Shareholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ 24.4
Total other comprehensive income (loss), net of tax	$ (0.9)	$ 2.1	75.4	$ (3.7)
Ending balance	3.2		3.2
Discontinued operation, foreign currency translation loss	0.1	0.0	75.8	0.0
Income tax provision (benefit)	(0.5)	0.0	(2.1)	0.1
Selling, general and administrative	8.3	17.1	18.9	33.9
Restructuring and other	(1.0)	0.9	5.8	1.5
Net loss	5.6	17.4	96.7	31.8
Gains (Losses) on Derivative Financial Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			0.0
Other comprehensive income (loss) before reclassifications, net of tax			0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			0.0
Total other comprehensive income (loss), net of tax			0.0
Ending balance	0.0		0.0
Defined Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(20.1)
Other comprehensive income (loss) before reclassifications, net of tax			(2.1)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			2.5
Total other comprehensive income (loss), net of tax			0.4
Ending balance	(19.7)		(19.7)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(76.0)
Other comprehensive income (loss) before reclassifications, net of tax			(0.8)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			75.8
Total other comprehensive income (loss), net of tax			75.0
Ending balance	(1.0)		(1.0)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(96.1)
Other comprehensive income (loss) before reclassifications, net of tax			(2.9)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			78.3
Total other comprehensive income (loss), net of tax			75.4
Ending balance	(20.7)		(20.7)
Reclassification out of Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net loss	1.3	(1.1)	78.3	(3.3)
Reclassification out of Accumulated Other Comprehensive Income | Gains (Losses) on Derivative Financial Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cost of goods sold	0.0	(2.0)	0.0	(5.3)
Income tax provision (benefit)	0.0	0.7	0.0	1.7
Net loss	0.0	(1.3)	0.0	(3.6)
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Income tax provision (benefit)	0.0	0.0	0.0	(0.1)
Selling, general and administrative	0.1	0.2	0.2	0.4
Restructuring and other	1.1	0.0	2.3
Net loss	1.2	0.2	2.5	0.3
Reclassification out of Accumulated Other Comprehensive Income | Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Discontinued operation, foreign currency translation loss	(0.1)	0.0	(75.8)
Income tax provision (benefit)	0.0	0.0	0.0	0.0
Net loss	0.1	$ 0.0	75.8
Nexsan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated foreign currency translation losses	$ 1.0		$ 1.0