INCOME TAXES - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Tax
Beginning Balance	$ 68.8	$ 66.3
Increase based on tax positions taken in a prior year	1.6	3.5
Decrease based on tax positions taken in a prior year	(3.0)	(3.3)
Increase based on tax positions taken in the current year	7.1	5.5
Decrease resulting from the lapse of statutes of limitations	(3.6)	(3.2)
Ending Balance	70.9	68.8
Interest and Penalties
Beginning Balance	15.6	11.7
Increase based on tax positions taken in a prior year	3.5	6.4
Decrease based on tax positions taken in a prior year	(1.0)	(1.0)
Increase based on tax positions taken in the current year	0.0	0.0
Decrease resulting from the lapse of statutes of limitations	(2.0)	(1.5)
Ending Balance	16.1	15.6
Total
Beginning balance	84.4	78.0
Increase based on tax positions taken in a prior year	5.1	9.9
Decrease based on tax positions taken in a prior year	(4.0)	(4.3)
Increase based on tax positions taken in the current year	7.1	5.5
Decrease resulting from the lapse of statutes of limitations	(5.6)	(4.7)
Ending balance	$ 87.0	$ 84.4