Annual report pursuant to Section 13 and 15(d)

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

Retirement Plans (Fair Value Of Pension Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2015	Feb. 01, 2014
Fair value of pension investments	$ 97us-gaap_InvestmentsFairValueDisclosure	$ 75us-gaap_InvestmentsFairValueDisclosure
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	97	75
Significant Unobservable Inputs (Level 3) [Member]
Fair value of pension investments	0	0
Pension Plan [Member]
Cash and cash equivalents	248	211
Fair value of pension investments	3,685	3,580
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	344	354
Pension Plan [Member] \| Significant Observable Inputs (Level 2) [Member]
Cash and cash equivalents	248	211
Fair value of pension investments	2,741	2,678
Pension Plan [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Cash and cash equivalents	0	0
Fair value of pension investments	600	548
Pension Plan [Member] \| Equity securities [Member] \| UNITED STATES
Fair value of pension investments	821	834
Pension Plan [Member] \| Equity securities [Member] \| International [Member]
Fair value of pension investments	659	748
Pension Plan [Member] \| Equity securities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| UNITED STATES
Fair value of pension investments	344	354
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	477	480
Pension Plan [Member] \| Equity securities [Member] \| Significant Observable Inputs (Level 2) [Member] \| International [Member]
Fair value of pension investments	659	748
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] \| International [Member]
Fair value of pension investments	0	0
Pension Plan [Member] \| U.S. Treasury bonds [Member]
Fair value of pension investments	272	221
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	272	221
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	55	39
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	55	39
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	28	22
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	28	22
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	434	388
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	434	388
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	91	95
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	91	95
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	19	20
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	19	20
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	458	454
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	458	454
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	244	214
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	244	214
Pension Plan [Member] \| Hedge Funds [Member]
Fair value of pension investments	175	167
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	175	167
Pension Plan [Member] \| Private equity [Member]
Fair value of pension investments	181	167
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	$ 181	$ 167