Postretirement Health Care and Life Insurance Benefits (Reconciliation Of Benefit Obligations, Plan Assets, And Funded Status Of The Postretirement Obligations) (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
Projected benefit obligation, beginning of year	$ 133	$ 137
Service cost	0	0	$ 0
Interest cost	2	5	5
Actuarial loss	(6)	5
Defined Benefit Plan, Benefit Obligation, Prescription Drug Subsidy Receipt	0	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(10)	(14)
Projected benefit obligation, end of year	119	133	137
Fair value of plan assets, beginning of year	0	0
Company contributions	10	14
Fair value of plan assets, end of year	0	0	$ 0
Funded status at end of year	(119)	(133)
Accounts payable and accrued liabilities	(13)	(14)
Other liabilities	(106)	(119)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(119)	(133)
Net actuarial (gain) loss	(32)	(30)
Prior service credit	(7)	(8)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	$ (39)	$ (38)