Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 30, 2021	Oct. 31, 2020	Oct. 30, 2021	Oct. 31, 2020
Total Retirement Expense	$ 3	$ 2	$ 14	$ 17
Pension Plan [Member]
Service cost	0	1	1	4
Interest cost	11	13	36	51
Expected return on assets	(39)	(46)	(122)	(138)
Recognition of net actuarial (gain) loss	5	11	22	31
Total net periodic benefit cost	(23)	(21)	(63)	(52)
Supplementary Retirement Plan [Member]
Interest cost	3	3	8	11
Recognition of net actuarial (gain) loss	3	3	10	9
Total net periodic benefit cost	6	6	18	20
Other Postretirement Benefits Plan [Member]
Interest cost	1	1	1	3
Recognition of net actuarial (gain) loss	(1)	(1)	(4)	(4)
Total net periodic benefit cost	0	0	(3)	(1)
401(k) Qualified Plan [Member] | Defined Contribution Plan [Member]
Defined contribution plan, cost	$ 20	$ 17	$ 59	$ 49