Acquisitions and Divestitures Discontinued Operations Textual (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 XtremeMac and Memorex [Member]	Sep. 30, 2012 XtremeMac and Memorex [Member]	Sep. 30, 2013 XtremeMac and Memorex [Member]	Sep. 30, 2012 XtremeMac and Memorex [Member]	Oct. 15, 2013 Subsequent Event [Member] XtremeMac and Memorex [Member]	Sep. 30, 2013 Subsequent Event [Member] XtremeMac and Memorex [Member]
Long Lived Assets Held-for-sale [Line Items]
Adjustment to carrying value of disposal group	$ 5.5	$ 0	$ 5.5	$ 0	$ 5.5	$ 0		$ 5.5
Estimated proceeds							19
Estimated proceeds in next two filing periods							$ 10