Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Total Retirement Expense	$ 2	$ 19	$ 17	$ 58
Settlement charges	26	12	65	12
Nonqualified Plan [Member]
Defined contribution plans expense	0	0	0	2
Qualified Plan [Member]
Defined contribution plans expense	17	25	49	74
Pension Plan [Member]
Service cost	1	2	4	4
Interest cost	13	26	51	78
Expected return on assets	(46)	(48)	(138)	(144)
Recognition of net actuarial (gain) loss	11	7	31	21
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(21)	(13)	(52)	(41)
Supplemental Employee Retirement Plan [Member]
Service cost	0	0	0	0
Interest cost	3	5	11	17
Recognition of net actuarial (gain) loss	3	2	9	6
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	6	7	20	23
Other Postretirement Benefits Plan [Member]
Service cost	0	0	0	0
Interest cost	1	1	3	3
Recognition of net actuarial (gain) loss	(1)	(1)	(4)	(4)
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 0	$ 0	$ (1)	$ (1)