Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified		0 Months Ended	1 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended		0 Months Ended		12 Months Ended
	Feb. 02, 2013	Mar. 20, 2009 Employee Claims Adams Claim item	Dec. 31, 2010 Employee Claims Adams Claim item	Feb. 02, 2013 Employee Claims Adams Claim item	Jan. 29, 2011 Employee Claims Adams Claim item	Sep. 15, 2011 Employee Claims Rea Claim item	Apr. 30, 2012 Consumer Class Action Claims Pricing and Promotion Maximum	Jun. 30, 2012 Consumer Class Action Claims Website Tracking and Coding Maximum	Feb. 10, 2011 Consumer Class Action Claims Zip Code Claims item	May 18, 2011 Consumer Class Action Claims Payment Card Terminal Tampering item	Feb. 02, 2013 Consumer Class Action Claims Payment Card Terminal Tampering item	Jan. 28, 2012 Consumer Class Action Claims Payment Card Terminal Tampering item	May 03, 2011 Consumer Class Action Claims Payment Card Terminal Tampering item
Commitments and Contingencies
Number of plaintiffs		114				4
Damages, penalties and fees sought by plaintiff							$ 5	$ 5
Number of additional plaintiffs				15	8
Additional purported class action lawsuits					2				3	2	4
Number of payment card terminals tampered													90
Number of cases subject to the consolidation order											4
Number of payment card terminals removed and replaced												7,100
Number of plaintiff's case had bench trial occurred			1
Aggregate estimate of possible loss	$ 14