Retirement Plans (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status Of The Pension Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Supplemental Employee Retirement Plan
Projected benefit obligation, beginning of year	$ 920	$ 770
Service cost	0	0	$ 6
Interest cost	31	33	32
Actuarial (gain) loss	(70)	170
Benefits paid	(58)	(53)
Projected benefit obligation, end of year	823	920	770
Fair value of plan assets, beginning of year	0	0
Company contributions	58	53
Fair value of plan assets, end of year	0	0	0
Funded status at end of year	823	920
Accounts payable and accrued liabilities	(138)	(69)
Other liabilities	(685)	(851)
Defined Benefit Plan, Amounts Recognized in Balance Sheet	(823)	(920)
Net actuarial loss	261	341
Prior service credit	8	8
Total included in accumulated other comprehensive income	269	349
Pension Plan [Member]
Projected benefit obligation, beginning of year	3,966	3,473
Service cost	6	6	112
Interest cost	137	151	143
Actuarial (gain) loss	(282)	563
Benefits paid	(242)	(227)
Projected benefit obligation, end of year	3,585	3,966	3,473
Fair value of plan assets, beginning of year	3,636	3,636	3,546
Actual return on plan assets	(138)	317
Company contributions	0	0
Fair value of plan assets, end of year	3,256	3,636	$ 3,636
Funded status at end of year	329	330
Other liabilities	(329)	(330)
Net actuarial loss	$ 1,451	$ 1,397