LEASES - Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 156.0		$ 0.0
Current portion of operating lease liabilities	38.0	$ 32.0	0.0
Operating lease liabilities	119.0		$ 0.0
Total operating lease liabilities	157.0
Sundry	4.7
Current maturities of long-term debt	1.2
Long-term debt	3.2
Total finance lease liabilities	$ 4.4