TAXATION - Summary of (Provision) Benefit for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal	$ 287.5	$ 125.1	$ 102.0
State	68.7	19.7	17.0
Foreign	95.2	35.5	94.0
Current income tax (expense)/benefit	451.4	180.3	213.0
Federal	72.7	57.6	16.6
State	22.2	5.2	4.3
Foreign	(15.2)	18.5	1.2
Deferred income tax (expense)/benefit	79.7	81.3	22.1
Total income tax expense (benefit)	$ 531.1	$ 261.6	$ 235.1