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Information for Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets (Detail) (U.S. Qualified Pension Plan, USD $)
In Millions, unless otherwise specified
Jan. 28, 2012
Jan. 29, 2011
U.S. Qualified Pension Plan
   
Schedule of Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Line Items]    
Projected benefit obligation $ 619 $ 581
Accumulated benefit obligation 619 581
Fair value of plan assets $ 546 $ 511 [1]
[1] Each category of plan assets is classified within the same level of the fair value hierarchy for 2011 and 2010.