Retirement Plans (Fair Value Of Pension Plan Assets) (Details) - USD ($) $ in Millions	Feb. 03, 2018	Jan. 28, 2017
Fair value of pension plan assets	$ 117	$ 112
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of pension plan assets	25	20
Significant Observable Inputs (Level 2) [Member]
Fair value of pension plan assets	92	92
Significant Unobservable Inputs (Level 3) [Member]
Fair value of pension plan assets	0	0
Pension Plan [Member]
Fair value of pension plan assets	3,447	3,377
Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of pension plan assets	2,097	1,421
Pension Plan [Member] | Significant Observable Inputs (Level 2) [Member]
Fair value of pension plan assets	686	821
Pension Plan [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of pension plan assets	0	0
Pension Plan [Member] | Money market securities [Member]
Fair value of pension plan assets	5	14
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	5	14
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	35	74
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	35	74
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	157	309
Pension Plan [Member] | Equity securities [Member] | United States pooled funds [Member]
Fair value of pension plan assets	481	654
Pension Plan [Member] | Equity securities [Member] | International [Member]
Fair value of pension plan assets	447	649
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	157	309
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	481	446
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	114	131
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	44	194
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	44	194
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	59	40
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	59	40
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	13	24
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	13	24
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	538	453
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	538	453
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	15	85
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	15	85
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	6	17
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	6	17
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	1,310	461
Pension Plan [Member] | Pooled funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of pension plan assets	1,310	461
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	148	223
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] | Private equity [Member]
Fair value of pension plan assets	183	186
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	9	13
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	9	13
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	(3)	(19)
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	(3)	(19)
Pension Plan [Member] | Derivatives in a negative position [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair value of pension plan assets	$ 0	$ 0