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LONG-TERM OBLIGATIONS - Long-Term Debt Obligations (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Mar. 14, 2025 | Jan. 14, 2025 | Dec. 31, 2024
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Finance lease obligations | $ 16.1 |  |  | $ 16.6
Total | 36,862.3 |  |  | 36,501.8
Less current portion of long-term obligations | (2,816.9) |  |  | (3,693.0)
Long-term obligations | 34,045.4 |  |  | 32,808.8
American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 34,533.4 |  |  | 34,174.9
American Tower subsidiary |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 2,312.8 |  |  | 2,310.3
2021 Term Loan | Unsecured debt | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 997.5 |  |  | $ 997.9
2.950% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) |  |  | 2.95% | 2.95%
Long-term debt | 0.0 |  |  | $ 650.0
2.400% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) |  | 2.40% |  | 2.40%
Long-term debt | $ 0.0 |  |  | $ 749.7
1.375% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.375% |  |  |
Long-term debt | $ 540.8 |  |  | 517.3
4.000% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 4.00% |  |  |
Long-term debt | $ 749.8 |  |  | 749.4
1.300% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.30% |  |  |
Long-term debt | $ 499.5 |  |  | 499.3
4.400% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 4.40% |  |  |
Long-term debt | $ 499.5 |  |  | 499.3
1.600% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.60% |  |  |
Long-term debt | $ 698.8 |  |  | 698.5
1.950% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.95% |  |  |
Long-term debt | $ 539.7 |  |  | 516.4
1.450% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.45% |  |  |
Long-term debt | $ 597.8 |  |  | 597.4
3.375% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.375% |  |  |
Long-term debt | $ 997.0 |  |  | 996.6
3.125% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.125% |  |  |
Long-term debt | $ 399.4 |  |  | 399.3
2.750% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 2.75% |  |  |
Long-term debt | $ 748.2 |  |  | 748.0
0.450% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 0.45% |  |  |
Long-term debt | $ 809.1 |  |  | 774.1
0.400% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 0.40% |  |  |
Long-term debt | $ 538.5 |  |  | 515.0
3.650% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.65% |  |  |
Long-term debt | $ 646.8 |  |  | 646.4
4.125% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 4.125% |  |  |
Long-term debt | $ 646.6 |  |  | 618.5
3.55% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.55% |  |  |
Long-term debt | $ 748.1 |  |  | 747.9
3.600% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.60% |  |  |
Long-term debt | $ 697.2 |  |  | 697.0
0.500% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 0.50% |  |  |
Long-term debt | $ 807.7 |  |  | 772.6
1.500% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.50% |  |  |
Long-term debt | $ 648.0 |  |  | 647.8
5.500% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.50% |  |  |
Long-term debt | $ 695.4 |  |  | 695.0
5.250% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.25% |  |  |
Long-term debt | $ 645.5 |  |  | 645.2
5.800% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.80% |  |  |
Long-term debt | $ 744.9 |  |  | 744.6
5.200% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.20% |  |  |
Long-term debt | $ 644.1 |  |  | 643.7
3.950% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.95% |  |  |
Long-term debt | $ 595.1 |  |  | 594.8
0.875% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 0.875% |  |  |
Long-term debt | $ 808.0 |  |  | 773.0
3.800% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.80% |  |  |
Long-term debt | $ 1,641.0 |  |  | 1,640.5
2.900% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 2.90% |  |  |
Long-term debt | $ 745.4 |  |  | 745.1
5.000% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.00% |  |  |
Long-term debt | $ 593.5 |  |  | 593.2
4.900% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 4.90% | 4.90% |  |
Long-term debt | $ 643.9 | $ 650.0 |  | 0.0
3.900% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.90% |  |  |
Long-term debt | $ 536.2 |  |  | 512.9
2.100% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 2.10% |  |  |
Long-term debt | $ 744.4 |  |  | 744.1
0.950% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 0.95% |  |  |
Long-term debt | $ 536.0 |  |  | 512.6
1.875% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.875% |  |  |
Long-term debt | $ 794.5 |  |  | 794.3
2.700% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 2.70% |  |  |
Long-term debt | $ 695.8 |  |  | 695.6
4.625% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 4.625% |  |  |
Long-term debt | $ 535.0 |  |  | 511.7
2.300% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 2.30% |  |  |
Long-term debt | $ 693.8 |  |  | 693.6
1.000% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.00% |  |  |
Long-term debt | $ 697.9 |  |  | 667.6
4.050% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 4.05% |  |  |
Long-term debt | $ 643.9 |  |  | 643.7
5.650% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.65% |  |  |
Long-term debt | $ 791.6 |  |  | 791.4
1.250% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 1.25% |  |  |
Long-term debt | $ 535.4 |  |  | 512.1
5.550% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.55% |  |  |
Long-term debt | $ 841.6 |  |  | 841.4
5.900% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.90% |  |  |
Long-term debt | $ 742.3 |  |  | 742.2
5.450% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.45% |  |  |
Long-term debt | $ 640.8 |  |  | 640.6
4.100% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 4.10% |  |  |
Long-term debt | $ 533.8 |  |  | 510.5
5.400% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.40% |  |  |
Long-term debt | $ 592.0 |  |  | 591.9
5.350% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 5.35% | 5.35% |  |
Long-term debt | $ 346.1 | $ 350.0 |  | 0.0
3.700% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.70% |  |  |
Long-term debt | $ 592.6 |  |  | 592.6
3.100% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 3.10% |  |  |
Long-term debt | $ 1,038.9 |  |  | 1,038.8
2.950% senior notes | Senior notes | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt interest rate (as a percent) | 2.95% |  |  |
Long-term debt | $ 1,024.0 |  |  | 1,023.8
Series 2015-2 notes | Secured debt | American Tower subsidiary |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 524.9 |  |  | 524.7
Series 2018-1A securities | Secured debt | American Tower subsidiary |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 497.8 |  |  | 497.6
Series 2023-1A Securities | Secured debt | American Tower subsidiary |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 1,288.9 |  |  | 1,288.0
Other subsidiary debt | Unsecured debt | American Tower subsidiary |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 1.2 |  |  | 0.0
Revolving Credit Facility | 2021 Multicurrency Credit Facility | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 50.0 |  |  | 0.0
Revolving Credit Facility | 2021 Credit Facility | American Tower Corporation |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | $ 360.0 |  |  | $ 0.0

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