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Income Taxes (Details) (USD $)	9 Months Ended
Income Taxes (Details) (USD $)	Oct. 29, 2011 basispoint	Oct. 30, 2010	Jan. 29, 2011
Income Taxes
Effective income tax rates (as a percent)	33.00%	30.00%
Settlement charge	$ 19,463,000
Effective income tax rate basis point increase	170
Aggregate accruals for uncertain tax positions, including penalties and interest and net of federal tax benefits	$ 17,700,000		$ 17,000,000

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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