INCOME TAXES - Significant components of income taxes, continuing operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
U.S.	$ 10.0	$ 7.4	$ (62.3)
Non - U.S.	32.9	50.8	53.5
State	0.0	0.1	0.1
Current expense (benefit)	42.9	58.3	(8.7)
Deferred:
U.S.	(20.9)	(6.3)	(140.3)
Non - U.S.	(17.0)	12.4	(1.7)
Deferred provision (benefit)	(37.9)	6.1	(142.0)
Total provision (benefit)	$ 5.0	$ 64.4	$ (150.7)