Summary of Significant Accounting Policies Lease Acquisition Costs (Details) (USD $) In Millions, unless otherwise specified	Jan. 28, 2012 year	Jan. 29, 2011
Summary of Significant Accounting Policies Disclosure [Abstract]
Lease Acquisition Cost Amortization Period Using Straight Line Method Low End of the Range	5
Lease Acquisition Cost Amortization Period Using Straight Line Method High End of the Range	40
Deferred Costs, Leasing, Net, Noncurrent	$ 20.0	$ 22.6

- Definition

This element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. The costs represented by this element are those costs not expected to be recognized in (amortized to) earnings within one year from the date of the statement of financial position or operating cycle, if longer.

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