Description Of Business (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Target Stores [Member] store	Dec. 31, 2009 Target Stores [Member] store	Dec. 31, 2012 RadioShack De Mexico [Member] store	Dec. 31, 2012 U.S. RadioShack Company-Operated Stores [Member] store	Dec. 31, 2012 United States Distribution Centers [Member] store	Dec. 31, 2012 Online Customers [Member] store	Dec. 31, 2010 Discontinued Operations [Member] Kiosks [Member] Sam's Club [Member] store	Dec. 31, 2012 Dealer Outlets [Member] store	Dec. 31, 2012 Dealer Outlets [Member] RadioShack De Mexico [Member] item	Dec. 31, 2012 Dealer Outlets [Member] Outside North American [Member] store
Description Of Business [Line Items]
Net sales and operating revenues from discontinued operations	$ 62.9	$ 206.9
Pretax income from discontinued operations	$ 8.4	$ 25.2
Number of stores			1,522	100	269	4,395			417	1,008	6	32
Number of distribution centers					1		3	1