LONG-TERM OBLIGATIONS - American Tower Secured Revenue Notes and Repayment of Series 2015-2 Notes (Details) - Secured debt - American Tower subsidiary - USD ($) $ in Millions	1 Months Ended
Jun. 30, 2025	May 31, 2015
Series 2015-1 notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 350.0
Series 2015-2 notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 525.0
Aggregate principal amount repaid	$ 525.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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