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Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
Income Taxes (Details) (USD $)	Oct. 28, 2012	Oct. 30, 2011	Oct. 28, 2012	Oct. 30, 2011
Income Taxes
Income tax expense	$ 44,548,000	$ 26,514,000	$ 87,368,000	$ 73,754,000
Effective Income Tax Rate, Continuing Operations	17.60%	13.00%	18.40%	13.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			35.00%
Unrecognized Tax Benefits	56,200,000		56,200,000
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations			$ 5,000,000

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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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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