FAIR VALUE MEASUREMENTS - Schedule of Debt (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Carrying Amount | Publicly traded debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 8,977.7	$ 9,225.8	$ 9,477.9
Carrying Amount | Non-publicly traded debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	0.2	0.2	0.7
Fair Value | Publicly traded debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	8,000.1	8,172.8	8,464.2
Fair Value | Non-publicly traded debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 0.2	$ 0.2	$ 0.6