Supplemental Guarantor Financial Information (Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Supplemental Guarantor Financial Information [Line Items]
Net cash (used in) provided by operating activities	$ 16.9	$ 48.5
Additions to property, plant and equipment	(5.1)	(11.2)
Proceeds from sale of property, plant and equipment	6.2
Changes in restricted cash		(28.0)
Other investing activities	(2.9)
Net cash (used in) provided by investing activites	(1.8)	(39.2)
Principal amount of long-term debt repayments	(70.5)
Payments of dividends		(12.4)
Changes in cash overdrafts	(45.4)	(22.2)
Net cash provided by (used in) financing activities	(115.9)	(34.6)
Net increase (decrease) in cash and cash equivalents	(100.8)	(25.3)
Cash and cash equivalents, beginning of period	535.7	591.7
Cash and cash equivalents, end of period	434.9	566.4
RadioShack Corporation [Member]
Supplemental Guarantor Financial Information [Line Items]
Net cash (used in) provided by operating activities	(8.0)	28.2
Additions to property, plant and equipment	(4.9)	(10.1)
Changes in restricted cash		(28.0)
Investment in subsidiary	(2.9)
Net cash (used in) provided by investing activites	(7.8)	(38.1)
Principal amount of long-term debt repayments	(70.5)
Payments of dividends		(12.4)
Changes in cash overdrafts	(45.4)	(22.2)
Change in intercompany receivable/payable	140.9	41.1
Net cash provided by (used in) financing activities	25.0	6.5
Net increase (decrease) in cash and cash equivalents	9.2	(3.4)
Cash and cash equivalents, beginning of period	84.9	154.6
Cash and cash equivalents, end of period	94.1	151.2
Guarantor Subsidiaries [Member]
Supplemental Guarantor Financial Information [Line Items]
Net cash (used in) provided by operating activities	33.0	30.3
Additions to property, plant and equipment		(1.0)
Proceeds from sale of property, plant and equipment	6.2
Investment in subsidiary	(2.9)
Net cash (used in) provided by investing activites	3.3	(1.0)
Capital contribution	2.9
Change in intercompany receivable/payable	(151.9)	(38.7)
Net cash provided by (used in) financing activities	(149.0)	(38.7)
Net increase (decrease) in cash and cash equivalents	(112.7)	(9.4)
Cash and cash equivalents, beginning of period	430.5	404.9
Cash and cash equivalents, end of period	317.8	395.5
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Financial Information [Line Items]
Net cash (used in) provided by operating activities	(8.1)	(10.0)
Additions to property, plant and equipment	(0.2)	(0.1)
Other investing activities	(2.9)
Net cash (used in) provided by investing activites	(3.1)	(0.1)
Capital contribution	2.9
Change in intercompany receivable/payable	11.0	(2.4)
Net cash provided by (used in) financing activities	13.9	(2.4)
Net increase (decrease) in cash and cash equivalents	2.7	(12.5)
Cash and cash equivalents, beginning of period	20.3	32.2
Cash and cash equivalents, end of period	23.0	19.7
Eliminations [Member]
Supplemental Guarantor Financial Information [Line Items]
Net cash (used in) provided by operating activities
Additions to property, plant and equipment
Changes in restricted cash
Investment in subsidiary	5.8
Net cash (used in) provided by investing activites	5.8
Payments of dividends
Changes in cash overdrafts
Capital contribution	(5.8)
Change in intercompany receivable/payable
Net cash provided by (used in) financing activities	(5.8)
Net increase (decrease) in cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period