TAXATION - Income Before Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Domestic	$ (469.2)	$ 1,212.0	$ 2,089.5
Foreign	231.3	35.7	411.0
Income/(loss) before income taxes	$ (237.9)	$ 1,247.7	$ 2,500.5