Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended
	May 01, 2021	May 02, 2020
Total Retirement Expense	$ 8	$ 5
Pension Plan [Member]
Service cost	0	1
Interest cost	12	19
Expected return on assets	(40)	(45)
Recognition of net actuarial (gain) loss	8	10
Total net periodic benefit cost	(20)	(15)
Supplementary Retirement Plan [Member]
Interest cost	3	4
Recognition of net actuarial (gain) loss	3	3
Total net periodic benefit cost	6	7
Other Postretirement Benefits Plan [Member]
Interest cost	0	1
Recognition of net actuarial (gain) loss	(1)	(1)
Total net periodic benefit cost	(1)	0
401(k) Qualified Plan [Member] | Defined Contribution Plan [Member]
Defined contribution plan, cost	$ 22	$ 13