Acquisitions and Divestitures Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Long Lived Assets Held-for-sale [Line Items]
Loss from discontinued operations, net of income taxes	$ (0.7)	$ (5.5)
XtremeMac and Memorex [Member]
Long Lived Assets Held-for-sale [Line Items]
Net revenue	0.5	11.2
Loss on sale of discontinued businesses, before income taxes	(0.5)	0
Loss from operations of discontinued businesses, before income taxes	(0.2)	(5.5)
Income tax provision (benefit)	0	0
Loss from discontinued operations, net of income taxes	$ (0.7)	$ (5.5)