v3.24.1.u1
LONG-TERM OBLIGATIONS - Long-Term Debt Obligations (Details)
€ in Millions
Mar. 31, 2024
USD ($)
Mar. 31, 2024
EUR (€)
Mar. 07, 2024
USD ($)
Feb. 14, 2024
USD ($)
Jan. 12, 2024
USD ($)
Dec. 31, 2023
USD ($)
Debt Instrument [Line Items]            
Finance lease obligations $ 19,800,000         $ 20,600,000
Total 39,259,500,000         38,921,500,000
Less current portion of long-term obligations (3,067,600,000)         (3,187,500,000)
Long-term obligations 36,191,900,000         35,734,000,000
American Tower Corporation            
Debt Instrument [Line Items]            
Long-term debt 36,806,500,000         36,472,000,000
American Tower subsidiary            
Debt Instrument [Line Items]            
Long-term debt 2,433,200,000         2,428,900,000
2021 Multicurrency Credit Facility | Revolving Credit Facility | American Tower Corporation            
Debt Instrument [Line Items]            
Long-term debt 1,011,600,000         723,400,000
2021 Term Loan | Unsecured debt | American Tower Corporation            
Debt Instrument [Line Items]            
Long-term debt 997,200,000         997,000,000.0
2021 Credit Facility | Revolving Credit Facility | American Tower Corporation            
Debt Instrument [Line Items]            
Long-term debt 2,038,400,000         1,603,400,000
2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt | American Tower Corporation            
Debt Instrument [Line Items]            
Long-term debt $ 890,100,000 € 825.0       910,700,000
0.600% Senior Notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 0.60% 0.60%     0.60%  
Long-term debt $ 0       $ 0 500,000,000.0
5.00% Senior Notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.00% 5.00%   5.00%    
Long-term debt $ 0     $ 0   1,000,100,000
3.375% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.375% 3.375%        
Long-term debt $ 650,000,000.0         649,700,000
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 $ 648,600,000         648,200,000
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 $ 748,800,000         748,500,000
1.375% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.375% 1.375%        
Long-term debt $ 538,000,000.0         550,000,000.0
4.000% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 4.00% 4.00%        
Long-term debt $ 748,400,000         748,100,000
1.300% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.30% 1.30%        
Long-term debt $ 498,500,000         498,300,000
4.400% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 4.40% 4.40%        
Long-term debt $ 498,900,000         498,700,000
1.600% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.60% 1.60%        
Long-term debt $ 697,700,000         697,400,000
1.950% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.95% 1.95%        
Long-term debt $ 537,400,000         549,600,000
1.450% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.45% 1.45%        
Long-term debt $ 596,300,000         595,900,000
3.375% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.375% 3.375%        
Long-term debt $ 995,100,000         994,700,000
3.125% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.125% 3.125%        
Long-term debt $ 399,000,000.0         398,900,000
2.750% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 2.75% 2.75%        
Long-term debt $ 747,300,000         747,000,000.0
0.450% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 0.45% 0.45%        
Long-term debt $ 805,900,000         824,300,000
0.400% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 0.40% 0.40%        
Long-term debt $ 536,100,000         548,200,000
3.650% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.65% 3.65%        
Long-term debt $ 645,200,000         644,800,000
4.125% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 4.125% 4.125%        
Long-term debt $ 643,900,000         658,600,000
3.55% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.55% 3.55%        
Long-term debt $ 747,300,000         747,100,000
3.600% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.60% 3.60%        
Long-term debt $ 696,300,000         696,000,000.0
0.500% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 0.50% 0.50%        
Long-term debt $ 804,400,000         822,800,000
1.500% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.50% 1.50%        
Long-term debt $ 647,300,000         647,100,000
5.500% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.50% 5.50%        
Long-term debt $ 694,000,000.0         693,600,000
5.250% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.25% 5.25%        
Long-term debt $ 644,200,000         643,900,000
5.800% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.80% 5.80%        
Long-term debt $ 743,700,000         743,400,000
5.200% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.20% 5.20% 5.20%      
Long-term debt $ 642,700,000   $ 650,000,000.0     0
3.950% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.95% 3.95%        
Long-term debt $ 594,000,000.0         593,700,000
0.875% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 0.875% 0.875%        
Long-term debt $ 805,100,000         823,700,000
3.800% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.80% 3.80%        
Long-term debt $ 1,639,100,000         1,638,600,000
2.900% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 2.90% 2.90%        
Long-term debt $ 744,500,000         744,200,000
2.100% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 2.10% 2.10%        
Long-term debt $ 743,400,000         743,100,000
0.950% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 0.95% 0.95%        
Long-term debt $ 533,800,000         546,000,000.0
1.875% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.875% 1.875%        
Long-term debt $ 793,600,000         793,300,000
2.700% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 2.70% 2.70%        
Long-term debt $ 695,200,000         695,000,000.0
4.625% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 4.625% 4.625%        
Long-term debt $ 533,000,000.0         545,200,000
2.300% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 2.30% 2.30%        
Long-term debt $ 692,900,000         692,700,000
1.000% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.00% 1.00%        
Long-term debt $ 695,400,000         711,500,000
4.050% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 4.05% 4.05%        
Long-term debt $ 643,100,000         642,900,000
5.650% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.65% 5.65%        
Long-term debt $ 790,800,000         790,600,000
1.250% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 1.25% 1.25%        
Long-term debt $ 533,400,000         545,800,000
5.550% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.55% 5.55%        
Long-term debt $ 840,800,000         840,600,000
5.900% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.90% 5.90%        
Long-term debt $ 741,700,000         741,500,000
5.450% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 5.45% 5.45% 5.45%      
Long-term debt $ 640,000,000.0   $ 650,000,000.0     0
3.700% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.70% 3.70%        
Long-term debt $ 592,500,000         592,400,000
3.100% senior notes | Senior Notes | American Tower Corporation            
Debt Instrument [Line Items]            
Debt interest rate (as a percent) 3.10% 3.10%        
Long-term debt $ 1,038,600,000         1,038,600,000
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 $ 1,023,300,000         1,023,200,000
Series 2015-2 notes | Secured debt | American Tower subsidiary            
Debt Instrument [Line Items]            
Long-term debt 524,200,000         524,100,000
Series 2018-1A securities | Secured debt | American Tower subsidiary            
Debt Instrument [Line Items]            
Long-term debt 497,000,000.0         496,800,000
Series 2023-1A Securities | Secured debt | American Tower subsidiary            
Debt Instrument [Line Items]            
Long-term debt 1,285,300,000         1,284,400,000
Other subsidiary debt | Unsecured debt | American Tower subsidiary            
Debt Instrument [Line Items]            
Long-term debt $ 126,700,000         $ 123,600,000