Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017
Total Retirement Expense	$ 17	$ 7	$ 46	$ 27
Settlement charges	23	22	73	73
Nonqualified Plan [Member]
Defined contribution plans expense	0	0	1	0
Qualified Plan [Member]
Defined contribution plans expense	24	20	71	65
Pension Plan [Member]
Service cost	1	1	4	4
Interest cost	28	25	81	79
Expected return on assets	(51)	(55)	(157)	(168)
Recognition of net actuarial (gain) loss	7	8	23	24
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(15)	(21)	(49)	(61)
Supplemental Employee Retirement Plan [Member]
Service cost	0	0	0	0
Interest cost	6	6	17	17
Recognition of net actuarial (gain) loss	2	2	6	6
Amortization of prior service credit	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	8	8	23	23
Other Postretirement Benefits Plan [Member]
Service cost	0	0	0	0
Interest cost	1	1	3	4
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)	$ (1)	$ (1)	$ (1)	$ 0