LEASE - OTHER INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lease Cost
Cash paid for amounts included in operating lease liabilities	$ 83.6	$ 71.3
Right of use assets obtained in the exchange for new operating lease liabilities	$ 70.1	$ 65.3
Weighted-average remaining operating lease term	7 years	7 years 6 months
Weighted-average incremental borrowing rate	3.70%	4.20%