LEASES - Lease Cost (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 103.1
Finance lease expense:
Amortization of right of use assets	2.2
Interest on lease liabilities	5.0
Total finance lease expense	7.2
Short-term lease expense	20.8
Variable lease expense	30.4
Total lease expense	161.5
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	109.8
Operating cash flows from finance leases	5.0
Financing cash flows from finance leases	1.3
Right of use assets obtained in exchange for new operating lease liabilities	20.9
Right of use assets obtained in exchange for new finance lease liabilities	$ 1.3
Weighted average remaining lease term (amounts in years)
Operating leases	6 years 4 months 13 days
Finance leases	22 years 11 months 26 days
Weighted average discount rate
Operating leases	5.60%
Finance leases	13.00%