DEBT - Outstanding Debt (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Debt Disclosure [Abstract]
Long-term debt (including current portion)	$ 9,597.4	$ 9,591.6	$ 9,589.5
Short-term borrowings	338.6	978.1	945.2
Total debt outstanding	$ 9,936.0	$ 10,569.7	$ 10,534.7