Segment Reporting (Schedule Of Segment Reporting Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenue by reportable segment	$ 805.4		$ 898.0		$ 2,498.9		$ 2,659.9
Operating (loss) income	(118.0)		(34.0)		(177.9)		(41.0)
Interest income	0.3		0.5		1.0		1.3
Interest expense	(11.5)		(13.2)		(40.6)		(39.2)
Other loss			(0.6)		(0.3)		(0.6)
Loss from continuing operations before income taxes	(129.2)		(47.3)		(217.8)		(79.5)
U.S. RadioShack Company-Operated Stores [Member]
Segment Reporting Information [Line Items]
Revenue by reportable segment	733.9		814.4		2,272.7		2,420.4
Operating (loss) income	(26.5)		62.1		74.1		225.4
Other [Member]
Segment Reporting Information [Line Items]
Revenue by reportable segment	71.5		83.6		226.2		239.5
Operating (loss) income	1.6		10.1		13.2		24.5
Operating Segments Subtotal [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	(24.9)		72.2		87.3		249.9
Unallocated [Member]
Segment Reporting Information [Line Items]
Operating (loss) income	$ (93.1)	[1]	$ (106.2)	[1]	$ (265.2)	[1]	$ (290.9)	[1]

[1] The unallocated category included in operating income relates to our overhead and corporate expenses that are not allocated to our operating segments for management reporting purposes. Unallocated costs include corporate departmental expenses such as labor and benefits, advertising, insurance, distribution, and information technology costs, plus certain unusual or infrequent gains or losses.