REVENUE - Contract Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract assets	$ 966.0	$ 886.8
Contract (liabilities)	(1,012.9)	(1,046.8)
Net contract (liabilities)	(46.9)	(160.0)
Contract assets, increase (decrease)	$ 79.2
Contract with customer, asset, net, current, increase (decrease), (in percent)	8.90%
Contract (liabilities), (increase) decrease	$ 33.9
Contract with customer liability, current, increase (decrease), (in percent)	3.20%
Net contract assets (liabilities), increase (decrease)	$ 113.1
Contract assets (liabilities), current, net, increase (decrease), (in percent)	70.70%
Contract with customer, liability, revenue recognized		305.3	$ 484.3
Contract with customer, performance obligation satisfied in previous period	$ 25.9	$ (21.7)