Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Contributions to 401(k) Plan	$ 5.7	$ 5.6	$ 6.2
Net periodic benefit cost of the SERP	1.3	1.7	1.7
Defined benefit plan benefit obligation	$ 16.6	$ 19.1
RadioShack 401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of employer contribution on participant's contributions	100.00%
Percentage of participant's contributions on annual compensation	4.00%
Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Annual amount equal to a percentage of the average of their highest consecutive years	5
Benefits payment period (in months)	120 months
Percentage increases for each year as an officer	2.50%
Amount of maximum percentage of payment eligible	50.00%
Salary Continuation And Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit to be paid (in years)	10
Minimum [Member] | RadioShack 401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution by plan participants	1.00%
Minimum [Member] | Salary Continuation And Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement age limit, years	55
Maximum [Member] | RadioShack 401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution by plan participants	75.00%