Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Retirement Plans (Fair Value Of Pension Plan Assets) (Details) - USD ($)
$ in Millions
Jan. 30, 2016
Jan. 31, 2015
Fair value of pension investments $ 132 $ 97
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension investments 0 0
Significant Observable Inputs (Level 2) [Member]    
Fair value of pension investments 132 97
Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member]    
Fair value of pension investments 3,246 3,685
Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension investments 295 344
Pension Plan [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension investments 907 1,007
Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Cash and Cash Equivalents [Member]    
Fair value of pension investments 15  
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension investments 15  
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension investments 0  
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension investments 0  
Pension Plan [Member] | Money market securities [Member]    
Fair value of pension investments 36 108
Pension Plan [Member] | Money market securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Money market securities [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension investments 36 108
Pension Plan [Member] | Money market securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Money market pooled funds [Member]    
Fair value of pension investments 46 140
Pension Plan [Member] | Money market pooled funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Money market pooled funds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Money market pooled funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | UNITED STATES    
Fair value of pension investments 280 344
Pension Plan [Member] | Equity securities [Member] | United States pooled funds [Member]    
Fair value of pension investments 391 477
Pension Plan [Member] | Equity securities [Member] | International [Member]    
Fair value of pension investments 575 659
Pension Plan [Member] | Equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | UNITED STATES    
Fair value of pension investments 280 344
Pension Plan [Member] | Equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | United States pooled funds [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] | International [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | UNITED STATES    
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | United States pooled funds [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | International [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | UNITED STATES    
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | United States pooled funds [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | International [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | U.S. Treasury bonds [Member]    
Fair value of pension investments 233 272
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 233 272
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 41 55
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 41 55
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 31 28
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 31 28
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 433 434
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 433 434
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 112 102
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 112 102
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 28 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 28 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 427 458
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 0 0
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 238 244
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 0 0
Pension Plan [Member] | Hedge Funds [Member]    
Fair value of pension investments 179 175
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 0 0
Pension Plan [Member] | Private equity [Member]    
Fair value of pension investments 188 181
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 0 0
Pension Plan [Member] | Derivatives in a positive position [Member]    
Fair value of pension investments 15 27
Pension Plan [Member] | Derivatives in a positive position [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Derivatives in a positive position [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension investments 15 27
Pension Plan [Member] | Derivatives in a positive position [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Derivatives in a negative position [Member]    
Fair value of pension investments (22) (38)
Pension Plan [Member] | Derivatives in a negative position [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension investments 0 0
Pension Plan [Member] | Derivatives in a negative position [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension investments (22) (38)
Pension Plan [Member] | Derivatives in a negative position [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension investments $ 0 $ 0