Shareholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ (25.3)
Total other comprehensive income (loss), net of tax	$ 0.1	$ (0.9)	0.2	$ 75.4
Ending balance	(27.5)		(27.5)
Selling, general and administrative	7.6	8.3	16.4	18.9
Restructuring and other	(0.6)	(1.0)	(0.1)	5.8
Net loss including noncontrolling interest	7.1	5.6	16.4	96.7
Cumulative translation adjustment	0.0	(0.1)	0.0	(75.8)
Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net loss including noncontrolling interest	0.1	1.3	0.2	78.3
Defined Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(19.6)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			0.2
Reclassification			(0.2)
Total other comprehensive income (loss), net of tax			0.0
Ending balance	(19.6)		(19.6)
Defined Benefit Plans | Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Selling, general and administrative	0.1	0.1	0.2	0.2
Restructuring and other	0.0	1.1	0.0	2.3
Net loss including noncontrolling interest	0.1	1.2	0.2	2.5
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(1.0)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			0.0
Reclassification			0.0
Total other comprehensive income (loss), net of tax			0.0
Ending balance	(1.0)		(1.0)
Foreign Currency Translation | Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative translation adjustment	0.0	$ 0.1	0.0	$ 75.8
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(20.6)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			0.2
Reclassification			(0.2)
Total other comprehensive income (loss), net of tax			0.0
Ending balance	$ (20.6)		$ (20.6)