Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended
	May 04, 2019	May 05, 2018
Total Retirement Expense	$ 20	$ 14
Nonqualified Plan [Member]
Defined contribution plans expense	1	0
Qualified Plan [Member]
Defined contribution plans expense	25	23
Pension Plan [Member]
Service cost	1	2
Interest cost	26	26
Expected return on assets	(48)	(53)
Recognition of net actuarial (gain) loss	7	8
Amortization of prior service credit	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(14)	(17)
Supplemental Employee Retirement Plan [Member]
Service cost	0	0
Interest cost	6	6
Recognition of net actuarial (gain) loss	2	2
Amortization of prior service credit	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	8	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