Annual report pursuant to Section 13 and 15(d)

Retirement Plans (Fair Value Of Pension Plan Assets) (Details)

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Retirement Plans (Fair Value Of Pension Plan Assets) (Details) (USD $)
In Millions, unless otherwise specified
Jan. 28, 2012
Jan. 29, 2011
Fair value of pension investments $ 81 $ 95
Pension Plan [Member]
   
Cash and cash equivalents 240 381
Fair value of pension investments 3,099 2,866
Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Cash and cash equivalents 0 0
Fair value of pension investments 251 238
Pension Plan [Member] | Significant Observable Inputs (Level 2) [Member]
   
Cash and cash equivalents 240 381
Fair value of pension investments 2,315 2,140
Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Cash and cash equivalents 0 0
Fair value of pension investments 533 488
Pension Plan [Member] | Equity securities [Member] | International [Member]
   
Fair value of pension investments 648 517
Pension Plan [Member] | Equity securities [Member] | U.S. [Member]
   
Fair value of pension investments 805 814
Pension Plan [Member] | Equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | International [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. [Member]
   
Fair value of pension investments 251 238
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | International [Member]
   
Fair value of pension investments 648 517
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | U.S. [Member]
   
Fair value of pension investments 554 576
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | International [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | U.S. Treasury bonds [Member]
   
Fair value of pension investments 128 54
Pension Plan [Member] | U.S. Treasury bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | U.S. Treasury bonds [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 128 54
Pension Plan [Member] | U.S. Treasury bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Other Government bonds [Member]
   
Fair value of pension investments 31 28
Pension Plan [Member] | Other Government bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Other Government bonds [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 31 28
Pension Plan [Member] | Other Government bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Agency backed bonds [Member]
   
Fair value of pension investments 5 11
Pension Plan [Member] | Agency backed bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Agency backed bonds [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 5 11
Pension Plan [Member] | Agency backed bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Corporate bonds [Member]
   
Fair value of pension investments 310 267
Pension Plan [Member] | Corporate bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Corporate bonds [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 310 267
Pension Plan [Member] | Corporate bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Mortgage-backed securities and forwards [Member]
   
Fair value of pension investments 112 107
Pension Plan [Member] | Mortgage-backed securities and forwards [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Mortgage-backed securities and forwards [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 112 107
Pension Plan [Member] | Mortgage-backed securities and forwards [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Asset-backed securities [Member]
   
Fair value of pension investments 21 19
Pension Plan [Member] | Asset-backed securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Asset-backed securities [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 21 19
Pension Plan [Member] | Asset-backed securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Pooled funds [Member]
   
Fair value of pension investments 266 180
Pension Plan [Member] | Pooled funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Pooled funds [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 266 180
Pension Plan [Member] | Pooled funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Real Estate [Member]
   
Fair value of pension investments 228 201
Pension Plan [Member] | Real Estate [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Real Estate [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 228 201
Pension Plan [Member] | Hedge Funds [Member]
   
Fair value of pension investments 143 143
Pension Plan [Member] | Hedge Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Hedge Funds [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Hedge Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments 143 143
Pension Plan [Member] | Private equity [Member]
   
Fair value of pension investments 162 144
Pension Plan [Member] | Private equity [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Private equity [Member] | Significant Observable Inputs (Level 2) [Member]
   
Fair value of pension investments 0 0
Pension Plan [Member] | Private equity [Member] | Significant Unobservable Inputs (Level 3) [Member]
   
Fair value of pension investments $ 162 $ 144