Annual report pursuant to Section 13 and 15(d)

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

v3.7.0.1
Retirement Plans (Fair Value Of Pension Plan Assets) (Details) - USD ($)
$ in Millions
Jan. 28, 2017
Jan. 30, 2016
Fair value of pension plan assets $ 112 $ 132
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 20 13
Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 92 119
Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member]    
Fair value of pension plan assets 3,377 3,246
Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 1,421 1,311
Pension Plan [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 821 907
Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Cash and Cash Equivalents [Member]    
Fair value of pension plan assets   15
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets   15
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets   0
Pension Plan [Member] | Cash and Cash Equivalents [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets   0
Pension Plan [Member] | Money market securities [Member]    
Fair value of pension plan assets 14 36
Pension Plan [Member] | Money market securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Money market securities [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 14 36
Pension Plan [Member] | Money market securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Money market pooled funds [Member]    
Fair value of pension plan assets 74 46
Pension Plan [Member] | Money market pooled funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 74 46
Pension Plan [Member] | Money market pooled funds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Money market pooled funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Equity securities [Member] | UNITED STATES    
Fair value of pension plan assets 309 280
Pension Plan [Member] | Equity securities [Member] | United States pooled funds [Member]    
Fair value of pension plan assets 654 391
Pension Plan [Member] | Equity securities [Member] | International [Member]    
Fair value of pension plan assets 649 575
Pension Plan [Member] | Equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | UNITED STATES    
Fair value of pension plan assets 309 280
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 plan assets 446 207
Pension Plan [Member] | Equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | International [Member]    
Fair value of pension plan assets 131 336
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | UNITED STATES    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | United States pooled funds [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | International [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | UNITED STATES    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | United States pooled funds [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | International [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | U.S. Treasury bonds [Member]    
Fair value of pension plan assets 194 233
Pension Plan [Member] | U.S. Treasury bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | U.S. Treasury bonds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 194 233
Pension Plan [Member] | U.S. Treasury bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Other Government bonds [Member]    
Fair value of pension plan assets 40 41
Pension Plan [Member] | Other Government bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Other Government bonds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 40 41
Pension Plan [Member] | Other Government bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Agency backed bonds [Member]    
Fair value of pension plan assets 24 31
Pension Plan [Member] | Agency backed bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Agency backed bonds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 24 31
Pension Plan [Member] | Agency backed bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Corporate bonds [Member]    
Fair value of pension plan assets 453 433
Pension Plan [Member] | Corporate bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Corporate bonds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 453 433
Pension Plan [Member] | Corporate bonds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Mortgage-backed securities and forwards [Member]    
Fair value of pension plan assets 85 112
Pension Plan [Member] | Mortgage-backed securities and forwards [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Mortgage-backed securities and forwards [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 85 112
Pension Plan [Member] | Mortgage-backed securities and forwards [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Asset-backed securities [Member]    
Fair value of pension plan assets 17 28
Pension Plan [Member] | Asset-backed securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Asset-backed securities [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 17 28
Pension Plan [Member] | Asset-backed securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Pooled funds [Member]    
Fair value of pension plan assets 461 427
Pension Plan [Member] | Pooled funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 461 427
Pension Plan [Member] | Pooled funds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Pooled funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Real Estate [Member]    
Fair value of pension plan assets 223 238
Pension Plan [Member] | Real Estate [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Real Estate [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Hedge Funds [Member]    
Fair value of pension plan assets   179
Pension Plan [Member] | Hedge Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets   0
Pension Plan [Member] | Hedge Funds [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets   0
Pension Plan [Member] | Hedge Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets   0
Pension Plan [Member] | Private equity [Member]    
Fair value of pension plan assets 186 188
Pension Plan [Member] | Private equity [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Private equity [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Private equity [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Derivatives in a positive position [Member]    
Fair value of pension plan assets 13 15
Pension Plan [Member] | Derivatives in a positive position [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Derivatives in a positive position [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets 13 15
Pension Plan [Member] | Derivatives in a positive position [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Derivatives in a negative position [Member]    
Fair value of pension plan assets (19) (22)
Pension Plan [Member] | Derivatives in a negative position [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair value of pension plan assets 0 0
Pension Plan [Member] | Derivatives in a negative position [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair value of pension plan assets (19) (22)
Pension Plan [Member] | Derivatives in a negative position [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair value of pension plan assets $ 0 $ 0