Postretirement Health Care and Life Insurance Benefits (Net Periodic Benefit Cost) (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Service cost	$ 0	$ 0	$ 0
Interest cost	5	5	5
Amortization of net actuarial (gain) loss	(6)	(5)	(5)
Amortization of prior service credit	(1)	(1)	0
Total net periodic benefit cost	(2)	(1)	0
Net actuarial (gain) loss recognized in OCI before tax	5	(11)	(9)
Amortization of net actuarial loss	6	5	5
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax	1	1	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	0	(10)
Total recognized in other comprehensive income	12	(5)	(14)
Total recognized in net periodic benefit cost and other comprehensive income	$ 10	$ (6)	$ (14)