Summary of Significant Accounting Policies Leases (Details) (USD $) In Millions, unless otherwise specified	Jan. 28, 2012	Jan. 29, 2011
Summary of Significant Accounting Policies [Abstract]
Deferred Rent Credit	$ 69.8	$ 47.0

- Definition

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

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