ACCRUED LIABILITIES (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Pension and other postretirement benefits	$ 32.1	$ 31.4
Compensation and related employee costs	62.4	73.6
Interest	33.6	44.3
Income taxes	18.3	23.9
Other	12.4	12.8
Total accrued liabilities	$ 158.8	$ 186.0