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LEASES - Lessor (Details) - USD ($) $ in Millions	12 Months Ended
LEASES - Lessor (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessor, Lease, Description [Line Items]
Property and equipment	$ 761.4	$ 832.4
Net investment in sales-type leases		55.7
Prepaid and other current assets	21.9	26.3
Depreciation	132.2	$ 114.4	$ 70.2
Lease income	24.2
Asset Leased Under Operating Leases
Lessor, Lease, Description [Line Items]
Depreciation	$ 20.5
Asset Leased Under Operating Leases \| Minimum
Lessor, Lease, Description [Line Items]
Terms	30 months
Asset Leased Under Operating Leases \| Maximum
Lessor, Lease, Description [Line Items]
Terms	72 months
Accounting Standards Update 2016-02
Lessor, Lease, Description [Line Items]
Property and equipment	$ 59.4
Net investment in sales-type leases	(55.8)
Prepaid and other current assets	$ (3.6)