American Tower (AMT)

Company ID: 67 | CIK: 0001053507
10-Q view:
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Segments are charted by their disclosed metrics (revenue, segment profit, etc.). Each line is a single segment. Reconciliation/corporate items are excluded. Major customers are shown as a percentage of revenue. Operational KPIs are grouped by metric concept; sub-metrics appear as separate lines.

Geographic Segments

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Business Unit / Product Segments

Major Customers (% of Revenue)

Operational KPIs

Tenant lease backlog (backlog)

New sites construction plan (capacity)

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Churn rate (churn)

Customers (customers)

Employees (headcount)

Total outstanding indebtedness (loans_outstanding)

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Build-to-suit commitments (order_book)

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AFFO (other)

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ALLTEL towers subleased (other)

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Acquisition commitments (other)

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Acquisition purchase price (other)

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Adjusted Consolidated Cash Flow (other)

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Adjusted EBITDA (other)

Adjusted consolidated cash flow (other)

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Annual rent escalation (other)

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Available borrowing capacity (other)

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Available liquidity (other)

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Average tenants per tower (other)

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Broadband equivalent tenants added (other)

Broadcast tower rights (other)

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Broadcast towers (other)

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Build-to-suit commitment (other)

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Build-to-suit sites (other)

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Build-to-suit sites constructed (other)

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Build-to-suit tower commitment (other)

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Build-to-suit tower commitments (other)

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Build-to-suit towers (other)

Build-to-suit towers built (other)

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Build-to-suit towers completed (other)

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Build-to-suit towers constructed (other)

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Build-to-suit towers obligated (other)

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Build-to-suit towers remaining (other)

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Capital expenditures (other)

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Carrier consolidation impact (other)

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Carrier consolidation margin impact (other)

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Carrier consolidation revenue impact (other)

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Cash and cash equivalents (other)

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Cash held by foreign subsidiaries (other)

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Cash interest paid (other)

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Churn impact on property revenue (other)

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Class A shares outstanding (other)

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Common Stock Outstanding (other)

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Common shares outstanding (other)

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Common stock outstanding (other)

Communication sites acquired (other)

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Communications sites (other)

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Communications sites acquired (other)

Communications sites constructed (other)

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Communications sites operated (other)

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Concrete poles (other)

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Construction capital expenditures (other)

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Contractual rent escalation (other)

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Countries of operation (other)

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Credit facility availability (other)

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Credit facility interest rate (other)

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DAS networks (other)

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DAS networks installed (other)

DAS sites (other)

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Data center facilities (other)

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Data center markets (other)

Debt repaid or refinanced (other)

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Debt service coverage ratio (other)

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Debt to Adjusted Consolidated Cash Flow (other)

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Debt to adjusted cash flow ratio (other)

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Effective tax rate (other)

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Fiber route miles (other)

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Field offices (other)

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Floating-rate debt share (other)

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Foreign currency exposure (other)

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GTP Cellular Sites DSCR (other)

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GTP Partners DSCR (other)

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GTP Towers DSCR (other)

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Ground agreements expiring 2017+ (other)

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Ground agreements expiring 2018 and beyond (other)

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Ground agreements expiring 2018+ (other)

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Ground agreements expiring 2019 or later (other)

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Ground lease coverage (other)

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Ground lease expiration profile (other)

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Ground lease expirations (other)

Ground leases 2035+ (other)

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Ground leases expiring 2020+ (other)

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Ground leases expiring 2021+ (other)

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Ground leases expiring 2022+ (other)

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Ground leases expiring 2024 or later (other)

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Ground leases expiring 2034+ (other)

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Ground leases expiring 2035+ (other)

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Ground leases with long-dated expirations (other)

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In-building system rights (other)

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In-building systems (other)

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In-building systems in operation (other)

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In-building systems installed (other)

In-building systems planned (other)

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Incremental revenue from existing towers (other)

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Interest rate cap notional (other)

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Interest rate swap agreements (other)

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Interest rate swap notional amount (other)

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Interest rate swaps (other)

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International communications sites (other)

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International revenue share (other)

Land lease expiry coverage (other)

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Land leases (other)

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Land leases expiring 2016 or later (other)

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Lease cancellation rate (other)

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Lease cancellations (other)

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Leases renewable 2031+ (other)

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Leases renewing 2020 or later (other)

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Leases renewing 2028+ (other)

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Long-dated tenant leases (other)

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Long-term debt outstanding (other)

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Managed communications sites (other)

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Managed rooftop sites (other)

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Managed third-party tower sites (other)

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Metropolitan areas with tower clusters (other)

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NAREIT FFO (other)

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NII acquisition consideration (other)

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NII communication sites acquired (other)

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NII towers closed (other)

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New domestic sites added (other)

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New international sites added (other)

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New sites (acquired or constructed) (other)

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New sites acquired or constructed (other)

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New sites added (other)

New sites constructed or acquired (other)

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New towers planned (other)

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Non-core towers disposed (other)

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Non-core towers sold (other)

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Non-tower Cash Flow (other)

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Notional amount of interest rate swaps (other)

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Number of Reportable Segments (other)

Operated towers (other)

Organic revenue growth (other)

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Outstanding debt (other)

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Owned DAS networks (other)

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Owned DAS sites (other)

Owned sites (other)

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Owned towers (other)

Pending acquisition sites (other)

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Planned tower construction (other)

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Pro forma indebtedness (other)

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Property interests acquired (other)

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Regional offices (other)

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Remaining lease term (other)

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Rent escalation rate (other)

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Revenue by industry sector (other)

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Revenue lost from cancellations (other)

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Revenue mix by segment (other)

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Revenue-producing rooftops (other)

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Revolver availability (other)

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Rooftop sites managed (other)

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SNAP land acreage (other)

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SNAPs (other)

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Same tower cash flow growth (other)

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Same tower revenue growth (other)

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Same-tower revenue growth (other)

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Satellite Antennae (other)

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Satellite antennae (other)

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Satellite antennae operated (other)

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Satellite antennas (other)

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Satellite dishes (other)

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Satellite network access points (other)

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Securitization DSCR (other)

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Securitization debt service coverage (other)

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Securitization towers (other)

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Shared generators installed (other)

Shares Outstanding (other)

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Shares outstanding (other)

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Shares repurchased (other)

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Sites acquired (other)

Sites acquired or constructed (other)

Sites added (other)

Sites added since 2005 (other)

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Sites built or acquired (other)

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Sites by country (other)

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Sites by region (other)

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Sites committed to acquire (other)

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Sites constructed (other)

Sites constructed or acquired (other)

Sites damaged by hurricanes (other)

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Sites no longer planned (other)

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Sites on land not owned (other)

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Sites on leased land (other)

Sites written off (other)

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SpectraSite indebtedness (other)

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States covered (other)

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States in network (other)

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Stock options outstanding (other)

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Stock repurchases (other)

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Teleport antennas (other)

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Tenant lease renewal profile (other)

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Tenant lease renewals (other)

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Tenant leases renewing 2017 and beyond (other)

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Tenant leases renewing 2017+ (other)

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Tenant leases renewing 2030+ (other)

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Tenant leases renewing 2031+ (other)

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Tenant leases with distant renewal (other)

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Tenant leases with extended renewal dates (other)

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Tenant leases with long renewal dates (other)

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Tenant leases with long-dated renewals (other)

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Tenant leases with renewal date (other)

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Tenants per tower (other)

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Third-party sites under lease (other)

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Top-100 market coverage (other)

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Total debt outstanding (other)

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Total indebtedness (other)

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Total liquidity (other)

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Total outstanding indebtedness (other)

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Total revenue growth (other)

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Total shares repurchased (other)

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Total towers closed (other)

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Tower clusters in top 50 MSAs (other)

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Tower portfolio count (other)

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Tower sale proceeds (other)

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Tower sites by land tenure (other)

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Tower sites constructed (other)

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Towers acquired (other)

Towers acquired and constructed (other)

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Towers acquired or constructed (other)

Towers acquired under ALLTEL agreement (other)

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Towers acquired/constructed (other)

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Towers added (other)

Towers added since 2002 (other)

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Towers built (other)

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Towers built or acquired (other)

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Towers completed (other)

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Towers constructed (other)

Towers constructed for third parties (other)

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Towers constructed or acquired (other)

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Towers disposed (other)

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Towers in pending acquisition (other)

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Towers in portfolio (other)

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Towers obligated to construct (other)

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Towers on leased land (other)

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Towers operated (other)

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Towers planned (other)

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Towers planned for construction (other)

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Towers sold (other)

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Towers subleased from ALLTEL (other)

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Towers subleased under ALLTEL (other)

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Towers to be built (other)

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Towers under lease/sublease (other)

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U.S. cell sites (other)

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U.S. network top-market coverage (other)

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U.S. states covered (other)

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US network coverage (other)

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US network coverage in top 100 markets (other)

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US network states (other)

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US network top-market coverage (other)

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Undrawn revolver availability (other)

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Variable rate debt (other)

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Weighted average shares (other)

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Weighted-average incremental borrowing rate (other)

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Weighted-average lease term (other)

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Weighted-average remaining lease term (other)

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Wireless towers (other)

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Working capital (other)

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us-gaap:NumberOfReportableSegments (other)

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Towers constructed (production_volume)

Owned communications sites (properties)

Non-cancellable lease revenue (rpo)

Same-tower growth (same_store_sales)

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Office square footage (square_footage)

Wireless subscribers (subscribers)

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New sites acquired or constructed (units_shipped)

Human capital disclosures. Workforce totals and demographics are point-in-time. Flow metrics use the year-to-date period for 10-Q and full year for 10-K. Workforce actions (RIFs, restructurings, acquisition-related changes) are listed in the table at the bottom.

Workforce Totals

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Demographics

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Workforce Breakdowns

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HCM Metrics — Point-in-Time

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HCM Metrics — Flow (Annual / YTD)

No flow HCM metrics found.

Workforce Actions

Period EndTypeStatusAffected% WorkforceAnnouncedExpected CompletionGeographySegment / FunctionChargeSourceNote
2025-12-31reduction_in_forcecompletedInternational (APAC)Executive leadership — EVP and President, APACother
f5-10k / MiMo-V2.6-Flash-fp8-HTML		The EVP and President, APAC role was eliminated during 2025; associated $7.1M reversal of stock-based compensation and forfeiture of 2024/2023 PSUs. No severance charge or affected-headcount figure disclosed.
2025-12-31divestiture_reductioncompleted2025-03-06South AfricaAfrica & APAC property segment — fiber businessdiscontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Fiber assets sold for approximately $137.7M with a $53.6M gain; headcount transferred or removed not disclosed.
2025-12-31acquisition_additioncompletedUnited States, Canada, France, SpainU.S. & Canada, Europe and Data Centers segmentsbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		312 communications sites plus data center assets acquired for $403.6M aggregate purchase price; associated headcount added not disclosed.
2025-12-31restructuringcompleted2025-12-312025-12-31GlobalAsia-PacificUSD 7 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Reversal of $7.1 million of previously recognized stock-based compensation expense associated with awards forfeited in connection with the departure of the Executive Vice President and President, APAC due to such role being eliminated.
2025-09-30restructuringcompletedAsia-PacificExecutive LeadershipUSD 7 (millions)MD&A
f5-10q / Qwen3.6-27B-Q8_0		Role of Executive Vice President and President, APAC eliminated; $7.1M stock-based compensation reversed.
2025-06-30othercompletedAsia-PacificExecutive Leadershipother
f5-10q / Qwen3.6-27B-Q8_0		Executive Vice President and President, APAC left the Company due to such role being eliminated. Associated stock-based compensation awards were forfeited.
2025-03-31restructuringcompletedAsia-PacificExecutive leadership (Office of the EVP and President, APAC)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		During Q1 2025 the EVP and President, APAC departed because the role was eliminated; related equity awards were forfeited and $5.3M of previously recognized PSU expense reversed (part of a $7.1M total stock-comp reversal). No employee count or severance charge disclosed.
2025-03-31divestiture_reductioncompleted2025-03-06South AfricaAfrica & APAC property segment (South Africa Fiber)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Sale of South Africa fiber assets closed 2025-03-06 for ZAR 2.5 billion (~$137.7M) with a $53.6M gain; no headcount associated with the divested business was disclosed.
2025-03-31acquisition_additionannounced2025-04-012025-04-01United States (Denver, Colorado)Data CentersUSD 180 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquisition of the DE1 multi-tenant data center completed 2025-04-01 for ~$180.0M total consideration; charge value reflects purchase consideration, not a workforce charge. No headcount added disclosed.
2025-03-31othercompletedAsia-PacificExecutive ManagementUSD 7 (millions)MD&A
f5-10q / Qwen3.6-27B-Q8_0		Role of Executive Vice President and President, APAC eliminated; reversal of $7.1M stock-based compensation expense associated with forfeited awards.
2024-12-31divestiture_reductioncompleted2024-01-042024-09-12IndiaAsia-Pacific property segment (reported as discontinued operations)USD 5 (millions)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Sale of 100% of ATC Telecom Infrastructure Private Limited (India operations) to Data Infrastructure Trust closed September 12, 2024 for approximately $2.2 billion, removing the India workforce from the consolidated portfolio; headcount affected not disclosed. Includes $5.3 million of accelerated stock-based compensation recognized for unvested RSUs held by India employees that vested at closing (63,905 shares accelerated).
2024-12-31divestiture_reductioncompleted20242024-11-11AustraliaAfrica & APAC property segmentother
f5-10k / GLM-5.3-flash-HTML		Sale of 100% of ATC Australia completed November 11, 2024 for AUD 63.4 million (approximately $41.2 million at closing); employee headcount affected not disclosed.
2024-12-31divestiture_reductioncompleted20242024-12-11New ZealandAfrica & APAC property segmentother
f5-10k / GLM-5.3-flash-HTML		Sale of 100% of ATC New Zealand completed December 11, 2024 for NZD 62.5 million (approximately $36.4 million at closing); employee headcount affected not disclosed. Combined with ATC Australia, an $8.5 million gain was recorded in Other operating expenses.
2024-12-31divestiture_reductionannounced2025-02-132025-03South AfricaAfrica & APAC property segment (South Africa Fiber subsidiary)subsequent_events
f5-10k / GLM-5.3-flash-HTML		Agreement to sell the South Africa fiber-holding subsidiary for ZAR 2.5 billion (approximately $132.7 million), subject to adjustments; announcement date reflects government approval received February 13, 2025. Completion expected during the first quarter of 2025; headcount affected not disclosed.
2024-12-31divestiture_reductioncompleted2024-01-042024-09-12IndiaAsia-Pacific property (discontinued operations)USD 1,246 (millions)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of ATC TIPL to Data Infrastructure Trust (Brookfield affiliate) completed 2024-09-12 for ~$2.2B. Loss on sale of $1,245.5M primarily from reclassification of cumulative translation adjustment. Headcount affected not disclosed.
2024-12-31divestiture_reductioncompleted2024-11-11AustraliaAfrica & APAC propertyother
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of ATC Australia completed 2024-11-11 for ~$41.2M. Gain of $8.5M recorded across Australia and New Zealand combined. Headcount affected not disclosed.
2024-12-31divestiture_reductioncompleted2024-12-11New ZealandAfrica & APAC propertyother
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of ATC New Zealand completed 2024-12-11 for ~$36.4M. Headcount affected not disclosed.
2024-12-31restructuringcompleted2024-12-31GlobalMultiple segments including corporateUSD 22 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		2023 workforce restructuring plan; charge of $21.8M recorded in 2023. No amounts outstanding as of 2024-12-31, indicating completion during fiscal year 2024. Charge attributed to prior fiscal year.
2024-12-31restructuringcompleted20232023-12-31GlobalVariousUSD 22 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Plan approved in 2023. Severance and related costs of $21.8 million recorded in 2023. No amounts outstanding as of Dec 31, 2024.
2024-09-30divestiture_reductioncompleted2024-01-042024-09-12IndiaAsia-Pacific property segment (ATC TIPL)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Sale of ATC TIPL (India operations) to Data Infrastructure Trust completed 2024-09-12. No employee headcount affected disclosed. RSUs for certain India employees accelerated upon closing ($5.3M accelerated stock-based comp).
2024-09-30divestiture_reductionannounced2024-06-30Australia and New ZealandAsia-Pacific property segmentother
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Agreements signed during Q3 2024 to sell 100% of ATC Australia and ATC New Zealand subsidiaries for ~$78.2M aggregate consideration. Will not qualify as discontinued operations. No employee headcount disclosed.
2024-06-30divestiture_reductionannounced2024-01-042024-12-31IndiaAsia-Pacific propertyother
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Agreement to sell 100% of ATC TIPL (India operations) to Data Infrastructure Trust; expected to close in second half of 2024 subject to regulatory approval. No employee count or workforce impact disclosed in the filing.
2023-12-31restructuringcompleted2023United States and CanadaU.S. & Canada propertyUSD 2 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Segment-level severance under the workforce restructuring plan approved and communicated to employees during 2023; company-wide severance and related costs of $21.8 million were recorded in 2023, of which $19.9 million was paid by year-end, leaving a $1.9 million accrual at December 31, 2023. Number of employees affected not disclosed.
2023-12-31restructuringcompleted2023AfricaAfrica propertyUSD 1 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Segment-level severance under the 2023 workforce restructuring plan (plan-wide total $21.8 million; $19.9 million paid during 2023). Affected employee count not disclosed.
2023-12-31restructuringcompleted2023EuropeEurope propertyUSD 3 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Segment-level severance under the 2023 workforce restructuring plan (plan-wide total $21.8 million; $19.9 million paid during 2023). Affected employee count not disclosed.
2023-12-31restructuringcompleted2023Latin AmericaLatin America propertyUSD 5 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Segment-level severance under the 2023 workforce restructuring plan (plan-wide total $21.8 million; $19.9 million paid during 2023). Affected employee count not disclosed.
2023-12-31restructuringcompleted2023United StatesServicesUSD 3 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Segment-level severance under the 2023 workforce restructuring plan; the Services segment operates in the United States per Item 1. Plan-wide total $21.8 million; $19.9 million paid during 2023. Affected employee count not disclosed.
2023-12-31restructuringcompleted2023Corporate / Other (unallocated)USD 8 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Corporate and other unallocated severance under the 2023 workforce restructuring plan (plan-wide total $21.8 million; $19.9 million paid during 2023, $1.9 million accrued at year-end). Note 13 separately discloses $7.6 million of severance-related stock-based compensation recorded in Other operating expense, outside the $21.8 million severance figure. Affected employee count not disclosed.
2023-12-31divestiture_reductionannounced2024-01-04IndiaAsia-Pacific propertysubsequent_events
f5-10k / GLM-5.3-flash-HTML		Subsequent event: agreement to sell 100% of ATC TIPL (India operations, approximately 76,000 communications sites) to Data Infrastructure Trust for aggregate consideration of up to approximately $2.5 billion; expected to close in the second half of 2024 subject to government and regulatory approval. No employee count disclosed; the India workforce is expected to transfer with the business.
2023-12-31restructuringcompleted2023-12-312023-12-31GlobalMultiple segments including corporateUSD 22 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Workforce restructuring plan approved and communicated during 2023; severance by segment: US & Canada 2.4, Africa 0.7, Europe 2.8, Latin America 4.7, Services 3.4, Other/corporate 7.8 (USD millions). Headcount affected not disclosed.
2023-12-31divestiture_reductioncompleted2023-03-292023-03-29MexicoLatin America property (fiber assets)USD 80 (millions)other
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of Mexico fiber subsidiary for $252.5M total consideration; loss on sale of $80.0M. Headcount not disclosed.
2023-12-31divestiture_reductioncompleted2023-05-312023-05-31PolandEurope propertyother
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of ATC Poland for EUR 6.7M (~$7.2M); gain of $1.1M. Headcount not disclosed.
2023-12-31divestiture_reductionannounced2024-01-042024-12-31IndiaAsia-Pacific propertysubsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Agreement with Data Infrastructure Trust (Brookfield) for 100% sale of ATC TIPL; consideration up to ~INR 210B (~$2.5B). Expected close 2H 2024 subject to regulatory approval. Headcount not disclosed.
2023-12-31restructuringcompleted2023-12-312023-12-31GlobalVariousUSD 22 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Workforce restructuring plan approved during the year. Employee count not disclosed.
2023-12-31restructuringin_progressEmployee Severance [Member]USD 21,800,000 (absolute)restructuring_footnote
f5-10k / no-ai-xblr
2023-09-30divestiture_reductioncompleted2023-03-292023-03-29MexicoLatin America propertyUSD 80 (millions)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Sale of fiber subsidiary completed 2023-03-29 for $252.5M; loss on sale of $80.0M. No employee impact quantified in the filing.
2023-09-30divestiture_reductioncompleted2023-05-312023-05-31PolandEurope propertyother
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Sale of ATC Poland subsidiary completed 2023-05-31 for EUR 6.7M; gain of $1.1M. No employee impact quantified in the filing.
2020-12-31acquisition_additioncompleted2020-11-042020-12-23United States, Canada, AustraliaU.S. & Canada property; Asia-Pacific propertybusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 100% of IWG Holdings, LLC (InSite Wireless Group) for total consideration of approximately $3.5 billion; portfolio of approximately 3,000 communications sites. Employees added through the acquisition are not quantified in the filing.
2020-12-31acquisition_additionannounced2021-01-13Argentina, Brazil, Chile, Germany, Peru, SpainEurope property; Latin America propertysubsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Post-year-end announcement to acquire Telxius' European and Latin American tower divisions, approximately 31,000 communications sites, for approximately EUR 7.7 billion; expected to close in tranches beginning Q2 2021. Headcount impact not disclosed.
2019-12-31acquisition_additioncompleted2019-12-31Africa (Burkina Faso, Ghana, Kenya, Niger, Nigeria, Uganda)Africa propertybusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 100% of Eaton Towers Holdings Limited, adding approximately 5,800 communications sites; total consideration approximately $2.0 billion. Filer does not disclose associated headcount added.
2019-12-31acquisition_additioncompleted2019-12-192019-12-26Chile, PeruLatin America propertybusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		First tranche of approximately 2,400 communications sites closed for $672.8 million; remaining sites of an approximately 3,200-site portfolio expected to close in tranches beginning Q1 2020. Filer does not disclose associated headcount added.
2017-12-31acquisition_additioncompleted2017-02-152017-02-15FranceEMEA propertyUSD 771 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 100% of FPS Towers, owner/operator of nearly 2,500 wireless tower sites; purchase consideration $771.2 million. No employee count disclosed.
2017-12-31acquisition_additioncompleted2017-11-172017-11-17MexicoLatin America propertyUSD 506 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired entities holding urban telecommunications assets (50,000+ concrete poles, ~2,100 route miles of fiber). No employee count disclosed.
2017-12-31acquisition_additioncompleted2017-12-312017-12-31United States, Brazil, Chile, Colombia, Germany, Mexico, Nigeria, Paraguay, PeruMultiple property segmentsUSD 814 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		2,453 communications sites acquired during 2017 for aggregate purchase price of $814.0 million; no employee counts disclosed. Announcement date shown as fiscal year-end because individual transaction dates are not given.
2017-12-31acquisition_additionannounced2017-11-132018-06-30IndiaAsia propertyUSD 1,200 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Signed agreements to acquire ~9,900 sites from ICISL ($611.4M) and ~10,235 sites from Vodafone ($588.4M); expected to close in first half of 2018 subject to regulatory approval. No employee counts disclosed; charge value is combined cash consideration at signing.
2016-12-31acquisition_additioncompleted2016-04-212016-04-21IndiaAsia property segmentbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 51% controlling interest in Viom Networks (renamed ATC TIPL), operator of approximately 42,000 towers and 200 indoor DAS networks; purchase price $1.149 billion. No employee headcount associated with the transaction is disclosed.
2016-12-31acquisition_additioncompleted2016-12-312016-12-31United States, Brazil, Chile, Germany, Mexico, Nigeria, South Africa, ArgentinaMultiple property segmentsbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 891 communications sites plus a company holding urban telecommunications assets and fiber in Argentina for an aggregate purchase price of $304.4 million. No associated employee headcount disclosed.
2016-12-31othercompleted2016-12-312016-12-31GermanyEMEA property segmentItem_1_Business
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Contributed German business to new joint venture ATC Europe in exchange for PGGM investment; any workforce transferred to the JV is not quantified in the filing.
2016-12-31acquisition_additioncompleted2016-12-192017-02-15FranceEMEA property segment (ATC Europe joint venture)subsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		ATC Europe agreed in December 2016 to acquire FPS Towers (approximately 2,400 tower sites in France); transaction closed 2017-02-15 for EUR 713.9 million ($757.1 million). No employee headcount disclosed.
2016-03-31acquisition_additioncompleted2015-10-212016-04-21IndiaAsia propertysubsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Closed 2016-04-21: 51% controlling interest in Viom Networks (42,000+ towers); full consolidation expected. No employee count disclosed.
2016-03-31acquisition_additionannounced2016-03-172016-06-30TanzaniaEMEA propertyother
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Signed agreement to acquire ~1,350 towers for ~$179.0 million; expected to close in Q2 2016. No employee count disclosed.
2014-12-31acquisition_additioncompleted2014-11-192014-11-19BrazilInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of BR Towers S.A. (4,617 towers owned or under exclusive use rights); purchase price approximately $568.9 million. No employee headcount disclosed.
2014-12-31divestiture_reductioncompleted2014-09-302014-09-30PanamaInternational rental and managementother
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of Panama operations completed September 2014 (aggregate sale price $17.9 million with third-party structural analysis business); no employee headcount disclosed.
2014-12-31acquisition_additionannounced2015-02-05United StatesDomestic rental and managementsubsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Post-fiscal-year-end announcement (Feb 5, 2015) to acquire rights to approximately 11,324 towers and purchase approximately 165 more from Verizon for $5.056 billion; no headcount impact disclosed.
2014-12-31acquisition_additionannounced2014-11-21BrazilInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Signed agreement to acquire two tower portfolios totaling approximately 6,480 towers in Brazil for approximately BRL 3.0 billion, subject to closing conditions; no headcount disclosed.
2014-12-31acquisition_additionannounced2014-11-24NigeriaInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Signed definitive agreement to acquire over 4,800 Airtel communications towers in Nigeria for approximately $1.1 billion, subject to closing conditions; no headcount disclosed.
2013-12-31acquisition_additioncompleted2013-10-012013-10-01United States, Costa Rica, PanamaDomestic and international rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of MIP Tower Holdings LLC (parent of Global Tower Partners), approximately 5,370 communications sites; purchase price $4.9 billion. No employee headcount added disclosed.
2013-12-31acquisition_additioncompleted2013-01-312013-01-31MexicoInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		883 communications sites acquired for $248.5 million; no employee headcount added disclosed.
2013-12-31acquisition_additioncompleted2013-11-082013-11-08MexicoInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		1,483 communications sites acquired for approximately $436.9 million total cash consideration; no employee headcount added disclosed.
2013-12-31acquisition_additioncompleted2013-12-062013-12-06BrazilInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		1,940 communications sites acquired for approximately $349.0 million; no employee headcount added disclosed.
2011-12-31acquisition_additioncompleted2011-03-012011-03-01BrazilInternational rental and managementUSD 585 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 100% of a company owning 627 communications sites; purchase price later increased to $585.4 million. Headcount added not disclosed.
2011-12-31acquisition_additioncompleted2011-03-082011-12-14South AfricaInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Three tranches from Cell C completed 2011-03-08 (959 sites, $149.1M), 2011-07-25 (329 sites, $51.5M) and 2011-12-14 (76 sites, $11.2M). Headcount added not disclosed.
2011-12-31acquisition_additioncompleted2011-05-062011-12-23GhanaInternational rental and managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Joint venture with MTN Group acquired 400, 770 and 686 sites in three 2011 tranches (aggregate roughly $513M including VAT). Headcount added not disclosed.
2011-12-31acquisition_additioncompleted2011-10-142011-10-14United StatesDomestic rental and managementUSD 312 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired portfolio of approximately 1,910 property interests (leased under about 1,810 communications sites) plus 12 sites; $196.0M debt assumed. Headcount added not disclosed.
2011-12-31acquisition_additioncompleted2011-12-152011-12-28MexicoInternational rental and managementUSD 416 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Two December 2011 closings from Telefónica Mexico: 584 sites for $121.9M and 1,422 sites for $294.4M. Headcount added not disclosed.
2011-12-31acquisition_additioncompleted2011-12-212011-12-21ColombiaInternational rental and managementUSD 104 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Purchased 1,346 existing sites for $104.0M plus $15.3M contingent consideration within an agreement for up to 2,126 towers. Headcount added not disclosed.
2011-12-31acquisition_additioncompleted2011-12-302011-12-30ChileInternational rental and managementUSD 95 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Purchased subsidiary owning 558 communications sites for $94.9M; additional 2011 Chile site purchases (VTR, Telefónica) also completed. Headcount added not disclosed.
2011-12-31acquisition_additioncompleted2011-12-312011-12-31United StatesDomestic rental and managementUSD 83 (millions)business_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Aggregate of 179 U.S. communications sites and equipment acquired during 2011 for $82.7M. Headcount added not disclosed.
2009-12-31acquisition_additioncompleted2009-05-272009-05-27IndiaRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 100% of XCEL Telecom for approximately $96.0 million cash; XCEL owned about 1,660 towers plus roughly 70 under development. Headcount added not disclosed.
2009-12-31acquisition_additioncompleted2009-07-222009-07-22BrazilRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 230 towers and related third-party leases for approximately $51.3 million. Headcount added not disclosed.
2009-12-31acquisition_additioncompleted2009-10-282009-10-28IndiaRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired Insight Infrastructure (Transcend) for approximately $18.9 million cash; about 326 towers plus roughly 40 under development. Headcount added not disclosed.
2009-12-31acquisition_additioncompleted2009-12-232009-12-23United StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquired 196 towers from Cincinnati Bell for approximately $99.9 million. Headcount added not disclosed.
2009-12-31acquisition_additioncompleted2009-12-312009-12-31United StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		During 2009 acquired 96 additional U.S. towers from various third parties for approximately $35.2 million, including about $1.7 million contingent consideration. Exact transaction date not stated; headcount added not disclosed.
2009-12-31acquisition_additionannounced2010-02-242010-06-30IndiaRental and Managementsubsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Transcend agreed to acquire Essar Telecom Infrastructure (ETIPL), about 4,450 tower sites, for estimated consideration of $430 million; expected to close by end of Q2 2010. Headcount added not disclosed.
2008-12-31othercompleted2005-082008-12-31USD 1,901 (thousands)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Employee separation obligations for former SpectraSite employees assumed in the August 2005 merger. Fiscal 2008 activity comprised $0.3 million of severance expense and $1.9 million of cash payments under a liability roll-forward (2005 opening balance $20.96 million); the liability was fully settled by December 31, 2008. No employee count is disclosed for the program; separations originally occurred in 2005-2006, with 2008 limited to final payments.
2008-12-31restructuringcompleted2008-12-31United StatesCorporateUSD 0 (millions)other
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Residual activity in 2008 on the employee separation program assumed in the August 2005 SpectraSite merger: $0.284 million expense and $1.901 million cash payments during 2008; accrued liability was zero at December 31, 2008. No employee count is disclosed.
2008-12-31restructuringcompletedUSD 11,189 (thousands)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Includes impairments, net loss on sale of long-lived assets, restructuring and merger related expense. Specific headcount not disclosed.
2007-12-31restructuringin_progress2005-082008-09-30Former SpectraSite, Inc. employeesUSD 633 (thousands)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Multi-year severance program assumed in the August 2005 SpectraSite merger (assumed liability of $22.4M). FY2007 activity only: $0.6M severance expense, $6.1M cash payments, and a $1.5M remaining liability at year-end, which the Company expects to pay through the third quarter of 2008. Employee counts affected are not disclosed.
2007-12-31acquisition_additioncompleted2007-01-31United StatesNetwork Development ServicesUSD 7 (millions)Item_1_Business
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Acquisition of a structural analysis engineering firm in January 2007 for $7.1 million; headcount added not disclosed.
2006-12-31restructuringcompleted2006-12-31USD 0 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Legacy restructuring reserve fully settled during 2006: roughly a $0.3 million credit from changes in previous estimates (not a new charge) plus about $0.1 million of residual cash payments. Employee separation and lease termination liabilities were zero at December 31, 2006. No employee count disclosed for this program.
2006-12-31restructuringin_progress2005-08-082008-09-30United StatesPost-merger integration of SpectraSite, Inc. (employee separations)USD 12 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Severance program for former SpectraSite employees assumed at the August 8, 2005 merger closing, with an assumed liability of $22.4 million. Fiscal 2006 activity: $12.4 million of severance cash payments and $0.5 million of incremental expense; $7.3 million liability remained at December 31, 2006, with the long-term portion expected to be paid through the third quarter of 2008. Number of affected employees not disclosed.
2006-12-31restructuringin_progressUnited StatesCorporate / operationsUSD 0 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		FY2006 restructuring roll-forward shows a net expense reversal of $0.267M for employee separations and a $0.108M reversal for lease terminations, bringing the accrued restructuring liability to zero at year-end; no employees-affected count or program announcement date is disclosed. Amount reflects current-fiscal-year activity only.
2006-12-31restructuringin_progress2005-08-082008-09-30United StatesRental and management (SpectraSite merger integration)USD 0 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		SpectraSite merger-related employee separation program continued into FY2006: $0.496M expense and $12.389M cash payments during the year, with $7.327M liability remaining at year-end ($5.8M current, $1.5M long-term, payable through Q3 2008). Headcount affected is not disclosed; announcement date is the SpectraSite merger closing. Charge shown is FY2006 expense only.
2006-12-31restructuringcompleted2005-08-032008-09-30United StatesCorporate / GeneralUSD 0 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Merger-related employee separation costs from SpectraSite acquisition. 2006 expense was $0.5 million. Liability expected to be paid through Q3 2008.
2006-12-31restructuringcompleted2006-01-012006-12-31GlobalCorporate / GeneralUSD 0 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		General restructuring activity. 2006 expense was $0.0 million. Liability reduced by $0.3 million due to changes in estimates; no remaining liability.
2006-09-30restructuringin_progress2008-09-30USD 8,897 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Liability for employee separation costs assumed from SpectraSite merger. Cash payments of $10.9M made during the period. Long-term portion expected to be paid through Q3 2008.
2006-06-30restructuringin_progress2005-08-012008-09-30United StatesCorporate / GeneralUSD 572 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Ongoing severance payments to former SpectraSite employees assumed in August 2005 merger. Liability balance was $10.5 million as of June 30, 2006. Employee count not disclosed.
2006-03-31restructuringin_progress2008-09-30United StatesSpectraSite, Inc. (assumed employee separation plans)USD 488 (thousands)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Employee separation liability rolled from $20,963K at 1/1/06 to $16,411K at 3/31/06 after $488K expense and $5,040K cash payments; no employee counts disclosed. Long-term portion of $5.5M expected paid through Q3 2008; current portion of $10.9M in accounts payable and accrued expenses.
2006-03-31restructuringin_progress2005-08-012008-09-30USD 0 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Merger with SpectraSite, Inc. employee separation costs. Liability balance decreased from $20.9M to $16.4M due to $5.0M cash payments.
2005-12-31restructuringin_progress2005-08-082008-09-30United StatesPost-merger integration of SpectraSite, Inc. — employee separations of former SpectraSite employeesUSD 22 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Severance obligations of $22.4 million for former SpectraSite employees assumed upon completion of the merger on August 8, 2005 (separations subject to plans established by SpectraSite and assumed by the Company). In addition, ~$5.1 million of merger-related separation and retention expense was recorded in 2005, $6.5 million was paid in cash during 2005, and a $21.0 million liability remained at December 31, 2005 ($14.5 million current; $6.5 million long-term, expected to be paid through Q3 2008). Affected headcount not disclosed. Related items included a $1.6 million charge to modify option awards for employees terminated in connection with the merger; MD&A separately cites $3.1 million of merger employee separation costs within $9.0 million total merger-related expense.
2005-12-31restructuringin_progress2006-12-31Rental and management segment (functions reorganized in 2003)USD 96 (thousands)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Continuation of a 2003 reorganization of certain rental and management segment functions; program initiation date not restated in this filing. FY2005 activity comprised $96 thousand of restructuring expense ($84 thousand employee separations, $12 thousand lease terminations) and $773 thousand of cash payments against prior accruals, leaving a $419 thousand liability at December 31, 2005 that the Company expects to settle before the end of 2006. No affected-employee headcount disclosed for the 2005 period.
2005-12-31acquisition_additioncompleted2005-052005-08-08United StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Merger completed August 8, 2005; approximately 169.5 million Class A shares issued. No employee headcount added through the merger is disclosed anywhere in the filing.
2005-12-31restructuringin_progress2005-08-082008-09-30United StatesCorporate / former SpectraSite employeesUSD 5 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Employee separation costs for former SpectraSite employees assumed in the merger: $22.4M liability assumed at acquisition, $5.1M expense recognized in 2005, $6.5M cash paid in 2005, $21.0M liability outstanding at year-end (long-term portion payable through Q3 2008). No affected-employee count disclosed.
2005-12-31restructuringin_progress2006-12-31United StatesRental and Management / corporateUSD 0 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Legacy restructuring program; 2005 activity only: $96K expense ($84K employee separations, $12K lease terminations) and $773K cash payments, leaving $419K liability at year-end. Filer expects employee separation balances paid before end of 2006. No affected-employee count disclosed; multi-year program, current-year activity only.
2005-12-31restructuringcompleted2005USD 3 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Employee separation costs incurred in connection with the SpectraSite merger.
2005-12-31restructuringcompleted2005USD 1 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Employee separation expense for general restructuring activities (distinct from merger).
2005-12-31acquisition_additioncompleted2005-05-012005-08-08United StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Merger closed August 2005; approximately 169.5 million Class A shares issued. Filer does not disclose headcount added; SpectraSite owned roughly 7,800 towers and in-building systems.
2005-12-31restructuringin_progress2006-12-31United StatesRental and ManagementUSD 0 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		FY2005 restructuring expense for employee separations was $96 thousand with $773 thousand of cash payments against the accrued liability; $301 thousand employee separation liability remained at year-end, expected to be paid before end of 2006. Employee counts not disclosed. Activity attributable to current fiscal year only.
2005-12-31restructuringin_progress2005-05-012008-09-30United StatesRental and ManagementUSD 5 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		SpectraSite merger-related employee separations: $22.4 million liability assumed at closing, $5.1 million expense recognized in FY2005, $6.5 million cash paid, $21.0 million liability outstanding at 12/31/2005 (long-term portion payable through Q3 2008). Employee counts not disclosed; includes retention and separation costs for former SpectraSite employees.
2005-12-31acquisition_additioncompleted2005-052005-08-08United StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Merger with SpectraSite, Inc. completed August 8, 2005, adding approximately 7,800 towers and in-building systems. No employee headcount added through the merger is disclosed. Employee separation costs of former SpectraSite employees were assumed as a liability of $22.4 million in the purchase price allocation.
2005-12-31restructuringcompletedUnited StatesRental and ManagementUSD 1 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		During FY2005 the company made cash payments of $0.8 million against a previously accrued restructuring liability. No new restructuring expense was incurred in FY2005. Employee count not disclosed.
2005-12-31restructuringin_progress2005-08-082008-09-30United StatesCorporate / Merger IntegrationUSD 5 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Employee separation costs for former SpectraSite employees recognized as merger-related expense of $5.1 million in FY2005, with an assumed liability of $22.4 million at acquisition. Remaining liability of $21.0 million at Dec 31, 2005, expected to be paid through Q3 2008. Employee count not disclosed.
2005-12-31restructuringcompleted2005-01-012006-12-31GlobalRental and ManagementUSD 1 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		During the year ended December 31, 2005, the Company made cash payments against its previous accrued restructuring liability in the amount of $0.8 million. The Company expects to pay the balance of these employee separation liabilities prior to the end of 2006.
2005-12-31restructuringin_progress2005-08-032008-09-30United StatesCorporate / Rental and ManagementUSD 9 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Merger related expense of $9.0 million incurred in connection with the SpectraSite merger, including employee separation costs of $3.1 million, amortization of unearned compensation relating to unvested stock options assumed of $2.4 million and other employee stock option charges of $3.5 million. Note 13 indicates long-term portion of merger related liabilities expected to be paid through third quarter of 2008.
2005-12-31restructuringcompletedUSD 1 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Cash payments against previous accrued restructuring liability. Employee count not disclosed.
2005-12-31restructuringcompletedUSD 3 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Employee separation costs incurred in connection with the SpectraSite merger.
2005-12-31restructuringcompletedUSD 2 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Amortization of unearned compensation relating to unvested stock options assumed in the SpectraSite merger.
2005-12-31restructuringcompletedUSD 4 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Other employee stock option charges incurred in connection with the SpectraSite merger.
2005-12-31restructuringcompletedUSD 2 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Charge for modified option awards to revise vesting and exercise terms for certain employees terminated in connection with the SpectraSite merger.
2005-09-30acquisition_additioncompleted2005-05-032005-08-08United StatesRental and Managementbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger with SpectraSite completed August 8, 2005; added approximately 7,800 towers and expanded portfolio to over 22,000 sites. No employee headcount added was disclosed.
2005-09-30restructuringin_progressUnited StatesRental and ManagementUSD 21 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Assumed employee separation liability from SpectraSite merger; balance of $20.68M at September 30, 2005, expected to be paid largely within twelve months. No employee count disclosed.
2005-09-30restructuringin_progress2005-12-31United StatesCorporateUSD 0 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Pre-existing restructuring liability (employee separations and lease terminations) of $0.499M at September 30, 2005; expected to be paid through end of 2005. No employee count disclosed.
2005-09-30restructuringin_progress2005-08-082006-09-30United StatesCorporate / General AdministrativeUSD 3 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Employee separation costs assumed from SpectraSite merger. Liability of $20.7 million as of Sept 30, 2005. Majority expected to be paid over next twelve months.
2005-09-30restructuringin_progress2005-12-31United StatesCorporate / General AdministrativeUSD 0 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Continuation of prior restructuring liability. Employee separations expense of $84k for nine months ended Sept 30, 2005. Balance expected to be paid through end of 2005.
2005-06-30restructuringin_progress2005-12-31USD 45 (thousands)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Employee-separation restructuring expense of $45 thousand recorded in six months ended June 30, 2005; no headcount disclosed. Remaining employee separation liabilities expected to be paid through second half of 2005.
2005-06-30acquisition_additioncompleted2005-05-032005-08-08United Statessubsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		SpectraSite merger completed 2005-08-08 (post-quarter); no employee headcount added disclosed. Target operated approximately 7,800 wireless and broadcast towers.
2005-06-30restructuringin_progress2005-12-31USD 45 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Employee separation expense of $45,000 recorded for six months ended June 30, 2005. Company expects to pay balance of employee separation liabilities through second half of 2005.
2005-03-31restructuringin_progress2005-12-31United StatesCorporateUSD 0 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Employee separation costs of $45 thousand recognized in Q1 2005; no headcount affected disclosed. Separation liabilities expected to be paid through second half of 2005; lease terminations still under negotiation.
2005-03-31restructuringin_progress2005-12-31USD 45 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Incurred employee separation costs of $45,000 during the quarter. Company expects to pay balance of employee separation liabilities through second half of 2005.
2004-12-31restructuringin_progress2005-06-30USD 1 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Ongoing multi-year program first announced in late 2001 and Q1 2002. FY2004 activity: $0.8 million of employee separation costs and $2.4 million of cash payments against employee-separation liabilities, leaving $0.7 million accrued at year-end ($3.3 million total cash payments including lease terminations). No headcount figure disclosed for FY2004 separations (the program's 2002 phase affected approximately 460 employees). Severance liabilities expected to be substantially paid in the first half of 2005.
2004-12-31divestiture_reductioncompleted2004-102004-11United StatesNetwork development services — tower construction services unitUSD 2 (millions)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Tower construction services unit sold in November 2004 for total consideration of approximately $9.1 million ($6.8 million cash plus buyer assumption of $2.3 million of capital lease obligations); net loss on disposal of $1.7 million recorded. No employee headcount transferred or otherwise affected was disclosed.
2004-12-31divestiture_reductioncompleted2003-062004-03United StatesNetwork development services — Kline Iron & Steel (steel fabrication and tall tower design)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Substantially all net assets of the steel fabrication and tall tower design subsidiary sold in March 2004 for approximately $4.0 million in cash, plus up to $2.0 million payable in 2006 contingent on 2005 revenues. A $14.6 million impairment (including $10.3 million of goodwill) to write assets down to expected proceeds was recorded in 2003; no FY2004 disposal charge disclosed. No employee headcount disclosed.
2004-12-31restructuringin_progressUnited StatesRental and management segmentUSD 1 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		FY2004 restructuring activity: employee separation costs of $0.8M, partly offset by a $0.1M decrease in the lease termination/facility closing accrual; restructuring liability of $1.1M remained at year-end. Employees affected not disclosed for 2004; prior-year program (2002) terminated approximately 460 employees.
2004-12-31divestiture_reductioncompleted2004-10-012004-11-30United StatesNetwork development services (tower construction services unit)USD 2 (millions)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of tower construction services unit closed November 2004 for ~$9.1M total consideration; net loss on disposal of $1.7M recorded in discontinued operations. Headcount transferred not disclosed.
2004-12-31divestiture_reductioncompleted2003-06-302004-03-31United StatesNetwork development services (Kline Iron & Steel)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Sale of substantially all Kline net assets completed March 2004 for ~$4.0M cash plus up to $2.0M contingent on 2005 revenues; the $14.6M impairment (including $10.3M goodwill) was recorded in FY2003. Headcount not disclosed.
2004-12-31restructuringcompleted2004-01-012005-06-30United StatesRental and ManagementUSD 1 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Incurred employee separation costs of $0.8 million in 2004. Company expects to pay substantially all employee separation liabilities in the first half of 2005.
2004-09-30restructuringin_progress2005-03-31USD 340 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Employee separation costs incurred during the nine months ended Sept 30, 2004. Balance expected to be paid in remainder of 2004 or first quarter of 2005.
2004-09-30restructuringin_progressUSD -95 (thousands)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Lease terminations and other facility closing costs incurred during the nine months ended Sept 30, 2004. Company continues to negotiate certain lease terminations.
2004-06-30restructuringin_progress2004-12-31restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Restructuring liability roll-forward shows employee separation accrual of $2.2M at Jan 1, 2004 reduced to $0.4M at Jun 30, 2004 via $1.8M cash payments; no employee count disclosed. Company expects to pay remaining employee separation liabilities during remainder of 2004.
2004-06-30otherannounced2004-08-01Network development services — construction services groupsubsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		In August 2004 the company announced it is considering strategic alternatives, including a potential sale, for its construction services group; no headcount impact quantified.
2004-06-30restructuringin_progress2004-12-31USD 2 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Liability balance of $1.68 million as of June 30, 2004, comprising $0.43 million for employee separations and $1.25 million for lease terminations. Company expects to pay employee separation liabilities during remainder of 2004.
2004-03-31restructuringin_progress2004-12-31USD 2 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Cash payments of $1.7M against accrued restructuring liability in Q1 2004 (employee separations $1.68M, lease/facility $0.02M); liability fell from $3.689M to $1.985M. No employee counts disclosed; balance expected to be paid during remainder of 2004.
2004-03-31restructuringin_progress2004-12-31USD 2 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Cash payments of $1.683 million made against accrued employee separation liability. Company expects to pay balance of employee separation liabilities during remainder of 2004.
2003-12-31restructuringcompletedRental and management segment (reorganization of certain functions)USD 2 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		2003 restructuring expense of approximately $2.3M per the accrued-liability roll-forward ($1.9M employee separations; $0.3M lease terminations and facility closing costs). MD&A separately cites $3.4M of 2003 employee separation and facility closing costs, and a $1.4M CEO retirement charge was also recorded in the same income-statement line (Note 10). Charges arose within the restructuring program first announced in November 2001; 2003 activity was primarily tied to a 2003 reorganization of rental and management functions (Item 1 notes the streamlining of the U.S. rental and management organization from three regions/ten areas to seven areas). Remaining accrued employee-separation liability of approximately $2.2M expected to be paid substantially in 2004. No employee count disclosed for the 2003 action.
2003-12-31divestiture_reductioncompleted2502003-12-22Former satellite and fiber network access services segment (Verestar, Inc.)USD 27 (millions)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Verestar filed for Chapter 11 protection on December 22, 2003 and ceased to be consolidated from that date; the original plan to dispose of the business was committed in December 2002. The 2003 charge is an aggregate impairment that wrote the investment in Verestar to zero and recorded estimated guarantor contract costs (not severance). The employee count was still included within the reported approximately 1,400 total as of December 31, 2003.
2003-12-31divestiture_reductionin_progress802003-062004-06-30Network development services segment (Kline Iron & Steel Co., Inc.)USD 15 (millions)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Plan to sell Kline committed June 2003 with a June 30, 2004 target. Substantially all net assets were sold on March 1, 2004 for approximately $4.0M cash plus up to $2.0M contingent consideration (Note 19 - Subsequent Events); remaining real estate assets expected to be sold by June 30, 2004. The 2003 charge is a non-cash impairment reducing Kline's net assets to estimated disposal proceeds, including $10.3M of goodwill (not severance). Employee count included within the reported approximately 1,400 total as of December 31, 2003.
2003-12-31restructuringin_progressUnited StatesRental and ManagementUSD 2 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		2003 restructuring expense of $2,266 thousand: $1,919 thousand employee separations and $347 thousand lease terminations/facility closing costs, tied to a reorganization of functions within the rental and management segment. MD&A separately describes employee separation and facility closing costs aggregating $3.4 million for 2003. No employee count disclosed for 2003 actions; substantially all employee separation liabilities expected to be paid in 2004.
2003-12-31divestiture_reductioncompleted2003-01-31United StatesNetwork Development Services (lighting systems business)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Flash Technologies sold January 2003 for approximately $35.5 million cash; net gain on disposal of approximately $0.1 million. Headcount of the divested business not disclosed.
2003-12-31divestiture_reductioncompleted2003-08-31United StatesNetwork Development Services (radio frequency engineering and consulting)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Galaxy Engineering sold August 2003 for approximately $3.5 million; net loss on disposal of approximately $2.4 million. Headcount of the divested business not disclosed.
2003-12-31divestiture_reductioncompleted802003-06-302004-06-30United StatesNetwork Development Services (steel fabrication and tall tower construction)USD 15 (millions)subsequent_events
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Company committed in June 2003 to sell Kline by June 30, 2004; substantially all net assets sold 2004-03-01 for approximately $4.0 million cash. Charge is the 2003 non-cash impairment of Kline's net assets (including $10.3 million goodwill). The 80 figure is the disclosed Kline subsidiary headcount at 2003-12-31, not an explicit affected-employee count.
2003-12-31otherin_progress2502003-12-22United StatesSatellite and fiber network access services (Verestar)USD 27 (millions)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Verestar filed Chapter 11 on 2003-12-22 and ceased to be consolidated from that date; charge is the 2003 impairment written down the investment in Verestar to zero. The 250 figure is Verestar headcount at 2003-12-31, which remains included in the disclosed total workforce; no headcount reduction recorded by the parent as of fiscal year-end.
2003-12-31acquisition_additioncompleted2002-12-312003-12-31Mexico and BrazilRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Tower-site asset purchases from NII Holdings; minimum obligation satisfied during 2003, bringing cumulative towers acquired to 665 for approximately $112.4 million. No headcount acquired disclosed.
2003-12-31acquisition_additionin_progress2003-12-312004-09-30MexicoRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Agreement to acquire up to 143 communications sites in Mexico for up to $31.4 million; 34 towers acquired in December 2003 for approximately $8.5 million, balance expected through Q3 2004. No headcount acquired disclosed.
2003-12-31restructuringcompleted2003Rental and ManagementUSD 2 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Employee separation costs primarily associated with reorganization of certain functions within rental and management segment. Accrued liability increased by $2.3 million.
2003-12-31restructuringin_progress2004-12-31United StatesRental and management segmentUSD 2 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		FY2003 restructuring expense of $2.266 million comprises $1.919 million of employee separation costs from reorganizing certain rental and management functions and $0.347 million of lease termination and facility closing costs; employees affected not disclosed for 2003. Filer expects to pay substantially all employee separation liabilities during 2004. Continuation of a program announced November 2001 (prior-year activity of approximately 525 separations in 2001 and approximately 460 in 2002 not extracted).
2003-12-31divestiture_reductioncompleted2502002-12-312003-12-22United StatesSatellite and fiber network access services (Verestar)Item_1_Business
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Verestar committed to sale in December 2002 and filed Chapter 11 on 2003-12-22, after which the Company ceased consolidation. Headcount is the approximate number of Verestar employees as of 2003-12-31 and is included in the Company's disclosed total of approximately 1,400.
2003-12-31divestiture_reductionin_progress802003-06-302004-06-30United StatesNetwork development services (Kline Iron & Steel)USD 15 (millions)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Company committed in June 2003 to sell Kline by 2004-06-30; approximately 80 employees as of 2003-12-31 (still included in disclosed total headcount). Substantially all net assets sold 2004-03-01; $14.6 million non-cash impairment charge recorded in FY2003 (includes $10.3 million goodwill).
2003-12-31divestiture_reductioncompleted2003-01-31United StatesNetwork development services (Flash Technologies)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Lighting systems business sold January 2003 for approximately $35.5 million cash; net gain on disposal of approximately $0.1 million. Employees affected not disclosed.
2003-12-31divestiture_reductioncompleted2003-08-31United StatesNetwork development services (Galaxy Engineering)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Radio frequency engineering and tower consulting business sold August 2003 for approximately $3.5 million; net loss on disposal of approximately $2.4 million. Employees affected not disclosed.
2003-12-31divestiture_reductioncompleted2003-02-28United StatesSatellite and fiber network access services (Maritime Telecommunications Network)discontinued_operations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Verestar subsidiary sold February 2003 for approximately $25.5 million cash; proceeds used to repay Verestar credit facility loans. Employees affected not disclosed.
2003-12-31restructuringcompleted2003Rental and ManagementUSD 3 (millions)MD&A
f5-10k / Qwen3.6-27B-Q8_0		Incurred employee separation costs primarily associated with reorganization of certain functions in rental and management segment and facility closing costs aggregating $3.4 million. Specific headcount not disclosed for 2003 action.
2003-09-30restructuringcompleted2003-12-31USD 2 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Cash payments of $1.7 million made against accrued liability for employee separations and lease terminations from prior restructuring initiatives. Liability balance reduced to $1.9 million. Completion expected in remainder of 2003.
2003-06-30restructuringcompleted1852002-03-312002-12-31Development and AdministrativeUSD 3 (millions)MD&A
f5-10q / Qwen3.6-27B-Q8_0		Termination of approx. 185 employees (primarily development and administrative) and lease termination costs incurred in Q2 2002. Initiatives completed by Dec 31, 2002.
2003-06-30restructuringcompleted3702002-06-302002-12-31Development and AdministrativeUSD 6 (millions)MD&A
f5-10q / Qwen3.6-27B-Q8_0		Termination of approx. 370 employees (primarily development and administrative) and lease termination costs incurred in H1 2002. Initiatives completed by Dec 31, 2002.
2003-03-31restructuringcompleted2002-03-312003-03-31Development and AdministrativeUSD 0 (thousands)MD&A
f5-10q / Qwen3.6-27B-Q8_0		No restructuring charges incurred in Q1 2003. Company completed restructuring initiatives to consolidate operations as of Dec 31, 2002. Prior Q1 2002 charge of $2.8M related to termination of approx 185 employees.
2002-12-31restructuringcompleted4602001-112002-12-31Continuing operations — primarily development and administrative functionsUSD 10,638 (thousands)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		2002 activity under program announced November 2001 (reduced scope of tower development/acquisition and centralized operations). Charge comprised $6.5M employee separations and $4.1M lease terminations and facility closing costs; $9.9M paid in cash during 2002, leaving $3.6M accrued liability at year-end. Company states restructuring initiatives were completed as of December 31, 2002 with no future charges expected. Prior-year 2001 activity (~525 employees) excluded.
2002-12-31restructuringcompleted1502002Discontinued operations (Verestar, Flash Technologies, MTS Components, office buildings)USD 12 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		Approximately 150 employees terminated (primarily operational and administrative), with lease termination and facility closing costs, in connection with businesses reported as discontinued operations; costs recorded in loss from discontinued operations. $6.7M accrued restructuring liability included in liabilities held for sale at year-end; certain lease terminations still under negotiation at year-end.
2002-12-31divestiture_reductionin_progress2002-122003-12-31Satellite and fiber network access services segment (Verestar)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Committed in December 2002 to dispose of wholly owned subsidiary Verestar, the entire satellite and fiber network access services segment, within twelve months; accounted for as discontinued operations. Employee headcount affected not disclosed. Company guarantees up to $12.0M of Verestar contractual obligations. Subsidiary Maritime Telecommunications Network sold February 2003 for approximately $26.8M; remaining Verestar expected to be sold by December 31, 2003.
2002-12-31divestiture_reductioncompleted20022003-01Flash Technologies (lighting systems business; formerly network development services segment)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Committed to sell Flash Technologies in the fourth quarter of 2002; consummated in January 2003 for approximately $41.1M in cash, subject to post-closing working capital adjustment. Employee headcount affected not disclosed.
2002-12-31divestiture_reductioncompleted2002-072002-07MTS Components (components business; formerly network development services segment)USD 16 (millions)discontinued_operations_footnote
f5-10k / GLM-5.3-flash-HTML		Sold in July 2002 for approximately $32.0M, consisting of $20.0M cash and $12.0M notes receivable; loss on disposal of approximately $16.0M net of an $8.6M income tax benefit. Employee headcount affected not disclosed.
2002-12-31restructuringcompleted4602001-11-012002-12-31United StatesDevelopment and administrativeUSD 11 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		FY2002 activity under multi-year restructuring announced November 2001; includes employee separation costs and facility closing costs. Approximately 460 employees terminated, primarily development and administrative. Company states restructuring initiatives completed as of December 31, 2002.
2002-12-31restructuringcompleted1502002-12-012002-12-31United StatesDiscontinued operations (Verestar, Flash Technologies, office buildings)USD 12 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Employee separations and facility closing costs related to businesses reported as discontinued operations in 2002; primarily operational and administrative employees. Included within loss from discontinued operations.
2002-12-31restructuringcompleted4602001-11-012002-12-31GlobalDevelopment and AdministrativeUSD 11 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Part of continuing initiative announced Nov 2001. Includes employee separations and lease terminations. Company stated restructuring initiatives to consolidate operations were completed as of Dec 31, 2002.
2002-12-31restructuringcompleted1502001-11-012002-12-31GlobalOperational and AdministrativeUSD 12 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Related to businesses reported as discontinued operations. Includes employee separations and lease terminations.
2002-09-30restructuringin_progress5152001-11-01United StatesPrimarily development and administration; includes SFNA segment initiativesUSD 18 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Consolidated nine-month figure; approximately 145 employees and $1.7M of the charge occurred in Q3 2002. Program combines the November 2001 corporate restructuring with SFNA cost-reduction initiatives begun in Q2 2002; includes lease termination and office closing costs alongside severance.
2002-09-30restructuringannounced2002-09-302002-12-31United StatesCorporate-wide cost reduction initiativesUSD 2 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Company expects $1.0M to $2.0M of additional restructuring charges in Q4 2002 for employee separation and facility shut-down costs; employee count not disclosed.
2002-09-30divestiture_reductioncompleted2002-06-302002-07-30United StatesComponents division (MTS Components and related businesses), previously within network development services segmentUSD 16 (millions)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Sale of two components businesses consummated July 30, 2002; loss on disposal of approximately $16.0M net of tax benefit. Headcount removed through the sale not disclosed.
2002-09-30plant_closurein_progress2002-09-01United StatesNetwork development services / tower constructionUSD 40 (millions)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Scope of new tower construction reduced for remainder of 2002 and 2003; write-off of construction-in-progress for approximately 800 sites no longer planned. Asset write-down rather than a disclosed headcount reduction.
2002-09-30restructuringin_progress1452002-07-01development and administrationUSD 2 (millions)MD&A
f5-10q / Qwen3.6-27B-Q8_0		Termination of approximately 145 employees in Q3 2002; part of broader initiative announced Nov 2001 and Q2 2002.
2002-09-30restructuringin_progress5152002-04-01development and administrationUSD 18 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Cumulative terminations of approx 515 employees in Q2 and Q3 2002 related to SFNA cost reduction and Nov 2001 restructuring.
2002-06-30restructuringin_progress3702001-112002-09-30United StatesPrimarily development and administration; includes SFNA segment infrastructure/transponder consolidationUSD 16 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Approximately 370 employees terminated in the six months ended June 30, 2002 (about 185 in Q2 2002 alone); charge covers six months. Includes office lease terminations and transponder lease terminations. An additional $3.0M-$5.0M of restructuring expense expected in Q3 2002.
2002-06-30divestiture_reductioncompleted2002-06-302002-07-30United StatesComponents division (including MTS Components), previously within network development services segmentUSD 16 (millions)other
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Company committed to dispose of substantially all components-business assets effective June 30, 2002; sale closed July 30, 2002 for about $31.6M. Charge is the estimated loss on disposal, net of $8.6M tax benefit. No employee count disclosed for the divested operations.
2002-06-30restructuringin_progress1852002-04-01development and administrationUSD 12 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Termination of approx. 185 employees in Q2 2002; includes employee separation, office lease termination, office closing, and transponder lease termination costs.
2002-06-30restructuringin_progress3702002-01-01development and administrationUSD 16 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Cumulative termination of approx. 370 employees in first six months of 2002; includes employee separation, office lease termination, office closing, and transponder lease termination costs.
2002-03-31restructuringcompleted1852002-01-012002-03-31United StatesDevelopment and administrationUSD 4 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Employee separations (~185 employees) plus facility closings (five office locations); $3.8M cash restructuring charges recorded in Q1 2002. Part of a broader program announced November 2001.
2002-03-31restructuringannounced2002-04-012002-09-30Not specifiedInfrastructure / transponder operations (Verestar / SFNA)USD 14 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Additional cost reduction initiatives announced in Q2 2002 targeting infrastructure costs and transponder consolidation; expected charges of $12.0M–$15.0M (midpoint shown). No employee count disclosed.
2002-03-31restructuringin_progress1852002-01-01development and administrationUSD 4 (millions)restructuring_footnote
f5-10q / Qwen3.6-27B-Q8_0		Includes employee separation costs and facility closing costs for five office locations.
2002-03-31restructuringannounced2002-04-012002-09-30USD 14 (millions)subsequent_events
f5-10q / Qwen3.6-27B-Q8_0		Announced in Q2 2002; expected charges of $12.0M-$15.0M over Q2 and Q3 2002 for infrastructure cost reductions.
2001-12-31restructuringin_progress6752001-11-06Consolidation across business segments; terminated employees primarily tower development and administrative personnelUSD 69 (millions)restructuring_footnote
f5-10k / GLM-5.3-flash-HTML		FY2001 restructuring program announced November 6, 2001 comprised a ~$62.6M non-cash construction-in-progress write-off for abandoned tower sites, ~$3.4M employee separation costs covering termination of ~675 employees, and ~$3.3M office closing costs for shutdown of ~20 field office locations. Approximately $3.0M of additional restructuring charges expected in Q1 2002; accrued restructuring liability of $3.6M at 2001-12-31.
2001-12-31restructuringin_progress6752001-11-062002-03-31United StatesTower development and administrative functionsUSD 7 (millions)restructuring_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Employee separation and office closing costs recorded in Q4 2001; approximately $3.0M additional restructuring charges expected in Q1 2002. Separately, a non-cash charge of $62.6M was recorded for abandoned tower construction sites under the same program.
2001-12-31restructuringcompleted6752001-11-06United StatesTower development and administrativeUSD 7 (millions)restructuring_footnote
f5-10k / Qwen3.6-27B-Q8_0		Employee separation costs associated with termination of approximately 675 employees. Total restructuring charge was $69.2 million, including $62.6 million for asset write-downs.
2001-09-30restructuringannounced2001-11-06Not specifiedAll business segmentsUSD 41 (millions)restructuring_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Charge range $41–44M. ~$9M for employee separations and office closings across all segments, expected Q4 2001 and Q1 2002. Remaining $32–35M is non-cash write-off of construction in progress from reduced tower development, recorded Q4 2001. Number of employees affected not disclosed.
2001-09-30restructuringannounced2001-11-062002-03-31GlobalAll segmentsUSD 44 (millions)subsequent_events
f5-10q / Qwen3.6-27B-Q8_0		Announced Nov 6, 2001. Includes $9M for employee separations/office closings (Q4 2001-Q1 2002) and $32-35M non-cash write-off of construction in progress (Q4 2001). Employee count not disclosed.
2000-12-31acquisition_additioncompletedUnited States, Canada, MexicoMultiple segmentsItem_1_Business
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Over 60 transactions in 2000 acquiring approximately 4,600 communications sites and related businesses for ~$1.8 billion; specific employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedUnited StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		AirTouch transaction: 1,801 towers leased, $686.1M cash paid; employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedUnited StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		AT&T transaction: 1,929 towers acquired for $258.1M cash; employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedUnited StatesRental and Managementbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		UNISite merger: $196.4M purchase price including $147.7M cash and $48.7M assumed debt; employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedUnited StatesSatellite and Fiber Network Access Servicesbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		USEI (U.S. Electrodynamics) merger: ~1.1M shares plus $33.2M cash; employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedUnited StatesSatellite and Fiber Network Access Servicesbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		General Telecom acquisition: $28.8M cash; employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedUnited StatesNetwork Development Servicesbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Galaxy Engineering Services acquisition: 523,113 shares plus $0.3M cash; employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedUnited StatesSatellite and Fiber Network Access Servicesbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		Publicom acquisition: ~0.4M shares plus $14.5M cash; employee headcount added not disclosed.
2000-12-31acquisition_additioncompletedInternationalSatellite and Fiber Network Access Servicesbusiness_combinations_footnote
f5-10k / MiMo-V2.6-Flash-fp8-HTML		InterPacket Networks merger: ~1.1M shares plus $21.4M cash; employee headcount added not disclosed.
2000-09-30acquisition_additioncompleted2000-01United StatesRental and ManagementUSD 196 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger consummated January 2000; purchase price approximately $196.4 million. No employee headcount added disclosed.
2000-09-30acquisition_additioncompleted2000-06United StatesInternet, Voice, Data and Video Transmission Servicesbusiness_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		U.S. Electrodynamics merger consummated June 2000; consideration included approximately 1.1 million Class A shares, $25.7 million cash and options. No employee headcount added disclosed.
2000-09-30acquisition_additioncompleted2000-06United StatesInternet, Voice, Data and Video Transmission ServicesUSD 29 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Stock purchase consummated June 2000 for $28.8 million cash; voice switching and network management operations in New York, Miami and Los Angeles. No employee headcount added disclosed.
2000-09-30acquisition_additionannounced2000-10United StatesMultiple segmentsUSD 157 (millions)subsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Several acquisitions consummated after quarter-end, including Publicom, Inc. via Verestar, Inc., for an aggregate preliminary purchase price of approximately $157.2 million. No employee headcount disclosed.
2000-09-30acquisition_additionannounced2000-09-30United StatesMultiple segmentsUSD 113 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Pending agreements covering remaining AirTouch and AT&T tower transactions plus two Verestar acquisitions, estimated aggregate cost approximately $113.3 million, expected to close in Q4 2000 and Q1 2001. No employee headcount disclosed.
1999-03-31acquisition_additioncompleted1998-11-161999-02-28United StatesRental and management; ServicesUSD 367 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger consideration disclosed; employee headcount added not disclosed. Company also assumed Omni employee stock options convertible into ~1.0 million Class A shares.
1999-03-31acquisition_additioncompleted1998-11-161999-02-28United StatesRental and managementUSD 144 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger consideration disclosed; employee headcount added not disclosed.
1998-06-30acquisition_additioncompleted1998-01United States (Atlanta, Georgia)Site acquisition servicesUSD 80 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Purchase price approximately $80.0 million; no employee headcount for the acquired business disclosed. Company later granted options over 1,400,000 shares to Gearon employees.
1998-06-30acquisition_additioncompleted1998-01United StatesTower operationsUSD 21 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Acquired company owned approximately 90 towers with 160 more under development; total purchase price variable up to $105.0 million, approximately $21.3 million paid at closing. No headcount disclosed.
1998-06-30acquisition_additioncompleted1998-05United States (Washington, D.C. area)Video, voice and data transmissionUSD 31 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Asset acquisition of a teleport business for approximately $30.5 million; no employee headcount disclosed.
1998-06-30acquisition_additioncompleted1998-06-081998-06-08United StatesTower operationsUSD 550 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Largest transaction of the quarter; aggregate preliminary purchase price approximately $550.0 million, 28,782,386 Class A shares issued. Acquired entity owned ~775 towers and managed ~125 towers; no employee headcount disclosed. Company renamed American Tower Corporation upon closing.
1998-06-30acquisition_additioncompleted1998-071998-08United States (California, Texas, Louisiana, Massachusetts, Georgia)Tower operationssubsequent_events
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Post-quarter acquisitions: microwave site in southern California (~$80,000), ten tower sites in southern Texas (~$6.3 million), three tower sites in Louisiana (~$0.75 million), a Massachusetts tower (~$0.6 million), and two Atlanta towers (~$0.4 million) in August 1998. No headcount disclosed for any transaction.
1998-06-30acquisition_additionannounced1998-061999-06-30United States (Tampa, Florida area)Tower operationsother
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Agreement signed June 1998 to acquire a company constructing approximately 40 towers in Tampa (seven operational); purchase price tied to a multiple of run-rate cash flow, payable in stock and up to 49% cash. Expected to close Spring 1999, subject to HSR Act clearance. No headcount disclosed.
1998-03-31acquisition_additioncompleted1998-01-081998-01-22Atlanta, Georgia, United StatesSite acquisition, development, construction and facility managementUSD 80 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Purchase price approx. $80.0M ($32.0M cash/assumed liabilities plus 5.3M Class A shares at $9.00). Employee headcount added not disclosed; options granted for 1,400,000 shares to Gearon employees at $13.00 exercise price.
1998-03-31acquisition_additioncompleted1998-01-311998-01-31United StatesTower ownership and developmentUSD 105 (millions)business_combinations_footnote
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Completed in January 1998; purchase price variable, up to $105.0M based on towers completed and forward cash flow, approx. $21.3M paid at closing. OPM owned ~90 towers with ~160 more under development. Employee headcount added not disclosed; exact day of closing not stated.
1998-03-31acquisition_additionannounced1997-121998-06-3031 states, United StatesWireless communications site ownership and leasingother
f5-10q / MiMo-V2.6-Flash-fp8-HTML		Merger of American Tower Corporation into ATS, expected to issue ~30.0M Class A shares; ATC owned/operated ~775 towers at 1997-12-31. Completion subject to HSR Act waiting period, expected Spring 1998. Employee headcount not disclosed; expected completion date is approximate per filing.