OTHER - Other General Expense - Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Income and Expenses [Abstract]
Provisions for environmental matters - net	$ 10.1	$ 10.6	$ 20.8	$ 17.9
(Gain) loss on sale or disposition of assets	0.4	1.4	(7.7)	0.8
Other general expense - net	$ 10.5	$ 12.0	$ 13.1	$ 18.7