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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

X
- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph a, f, g -Article 7 + Details
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