Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended
	May 02, 2020	May 04, 2019
Total Retirement Expense	$ 5	$ 20
Nonqualified Plan [Member]
Defined contribution plans expense	0	1
Qualified Plan [Member]
Defined contribution plans expense	13	25
Pension Plan [Member]
Service cost	1	1
Interest cost	19	26
Expected return on assets	(45)	(48)
Recognition of net actuarial (gain) loss	10	7
Amortization of prior service credit	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(15)	(14)
Supplemental Employee Retirement Plan [Member]
Service cost	0	0
Interest cost	4	6
Recognition of net actuarial (gain) loss	3	2
Amortization of prior service credit	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	7	8
Other Postretirement Benefits Plan [Member]
Service cost	0	0
Interest cost	1	1
Recognition of net actuarial (gain) loss	(1)	(1)
Amortization of prior service credit	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 0	$ 0