Acquisitions and Divestitures - Schedule of Key Components of Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of income taxes	$ 0.0	$ (1.6)	$ 0.0	$ (2.3)
Discontinued Operations | XtremeMac and Memorex
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue	0.0	0.0	0.0	0.5
Loss on sale of discontinued businesses, before income taxes	0.0	(1.2)	0.0	(1.7)
Loss from operations of discontinued businesses, before income taxes	0.0	(0.4)	0.0	(0.6)
Income tax provision (benefit)	0.0	0.0	0.0	0.0
Loss from discontinued operations, net of income taxes	$ 0.0	$ (1.6)	$ 0.0	$ (2.3)