Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 0.5	$ (5.8)	$ (35.5)	$ (201.7)
Other comprehensive income (loss), net of tax
Unrealized income (loss) on derivatives, net of income tax provision of $0.0, $0.0, $0.0 and $1.1, respectively	0.1	(0.1)	0.6	1.5
Employee pension and postretirement benefits, net of income tax provision of $0.4, $0.0, $0.8 and $0.0, respectively	0.5	1.2	1.1	2.4
Foreign currency translation adjustments	23.1	(17.4)	33.2	31.8
Net current period other comprehensive income (loss)	23.7	(16.3)	34.9	35.7
Comprehensive income (loss)	$ 24.2	$ (22.1)	$ (0.6)	$ (166.0)