Acquisitions and Divestitures Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale, intangible	$ 1.7		$ 1.7
Discontinued operations	(3.3)	(2.5)	(8.8)	(5.5)
XtremeMac and Memorex
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale, inventory	18.4		18.4
Assets held for sale, intangible	1.7		1.7
Assets held for sale, tooling	1.7		1.7
Disposal group, net revenue	12.2	21.4	23.4	39.8
Loss from operations of discontinued businesses, before income taxes	(3.3)	(2.8)	(8.8)	(6.1)
Income tax benefit	0	(0.3)	0	(0.6)
Discontinued operations	$ (3.3)	$ (2.5)	$ (8.8)	$ (5.5)