Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans (Net Periodic Benefit Cost) (Details)

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Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
Total Retirement Expense $ 3 $ 10 $ 11 $ 15
Pension Plan [Member]        
Service cost 1 2 1 3
Interest cost 13 18 25 38
Expected return on assets (43) (46) (83) (92)
Recognition of net actuarial (gain) loss 9 10 17 20
Total net periodic benefit cost (20) (16) (40) (31)
Supplementary Retirement Plan [Member]        
Interest cost 3 4 6 8
Recognition of net actuarial (gain) loss 3 3 6 6
Total net periodic benefit cost 6 7 12 14
Other Postretirement Benefits Plan [Member]        
Interest cost 0 1 0 2
Recognition of net actuarial (gain) loss (2) (2) (3) (3)
Total net periodic benefit cost (2) (1) (3) (1)
401(k) Qualified Plan [Member] | Defined Contribution Plan [Member]        
Defined contribution plan, cost $ 17 $ 19 $ 39 $ 32