Postretirement Health Care and Life Insurance Benefits (Net Periodic Benefit Cost) (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
Service cost	$ 0	$ 0	$ 0
Interest cost	2	5	5
Amortization of net actuarial gain	(4)	(6)	(5)
Amortization of prior service credit	(1)	(1)	(1)
Total net periodic benefit cost	(3)	(2)	(1)
Net actuarial loss (gain)	(6)	5	(11)
Amortization of net actuarial loss	4	6	5
Amortization of prior service credit	1	1	1
Prior service credit	0	0	0
Total recognized in other comprehensive income	(1)	12	(5)
Total recognized	$ (4)	$ 10	$ (6)