Postretirement Benefits (Benefit Obligations And Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2021	Feb. 01, 2020
Postretirement Benefits Disclosure [Line Items]
Underfunded status at end of year	$ (229)	$ (224)
Change In Benefit Obligation [Member]
Postretirement Benefits Disclosure [Line Items]
Benefit obligation at beginning of year	224	190
Participant service cost	2	2
Interest cost	6	7
Benefits paid	(10)	(9)
Actuarial loss	7	34
Benefit obligation at end of year	229	224
Change In Plan Assets [Member]
Postretirement Benefits Disclosure [Line Items]
Fair value of plan assets at beginning of year	0	0
Employer contribution	10	9
Benefits paid	(10)	(9)
Fair value of plan assets at end of year	$ 0	$ 0