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LONG-TERM OBLIGATIONS - Repayments of Senior Notes (Details) - American Tower Corporation - USD ($)
Feb. 14, 2024
Jan. 12, 2024
Mar. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]        
Long-term debt     $ 36,806,500,000 $ 36,472,000,000
0.600% Senior Notes | Senior Notes        
Debt Instrument [Line Items]        
Debt interest rate (as a percent)   0.60% 0.60%  
Aggregate principal amount   $ 500,000,000    
Long-term debt   $ 0 $ 0 500,000,000.0
5.00% Senior Notes | Senior Notes        
Debt Instrument [Line Items]        
Debt interest rate (as a percent) 5.00%   5.00%  
Aggregate principal amount $ 1,000,000,000      
Long-term debt $ 0   $ 0 $ 1,000,100,000