Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 03, 2019	Aug. 04, 2018	Aug. 03, 2019	Aug. 04, 2018
Total Retirement Expense	$ 19	$ 15	$ 39	$ 29
Settlement charges	0	50	0	50
Nonqualified Plan [Member]
Defined contribution plans expense	1	1	2	1
Qualified Plan [Member]
Defined contribution plans expense	24	24	49	47
Pension Plan [Member]
Service cost	1	1	2	3
Interest cost	26	27	52	53
Expected return on assets	(48)	(53)	(96)	(106)
Recognition of net actuarial (gain) loss	7	8	14	16
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(14)	(17)	(28)	(34)
Supplemental Employee Retirement Plan [Member]
Service cost	0	0	0	0
Interest cost	6	5	12	11
Recognition of net actuarial (gain) loss	2	2	4	4
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	8	7	16	15
Other Postretirement Benefits Plan [Member]
Service cost	0	0	0	0
Interest cost	1	1	2	2
Recognition of net actuarial (gain) loss	(2)	(1)	(3)	(2)
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (1)	$ 0	$ (1)	$ 0