Annual report pursuant to Section 13 and 15(d)

Postretirement Health Care and Life Insurance Benefits (Narrative) (Details)

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Postretirement Health Care and Life Insurance Benefits (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Feb. 02, 2013
Jan. 29, 2011
Estimated net actuarial gain of postretirement benefit obligations $ (3)  
Deferred tax expense to reduce deferred tax asset as a result of eliminated deductibility of retiree health care payments   $ 4