Retirement Plans (Retirement Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Total Retirement Expense	$ 43	$ 44	$ 77
Pension Plan [Member]
Total net periodic benefit cost	(82)	(83)	(54)
Supplemental Employee Retirement Plan
Total net periodic benefit cost	31	31	41
Defined Contribution Qualified Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Contribution Plan, Cost	93	94	88
Non qualified defined contribution plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Contribution Plan, Cost	$ 1	$ 2	$ 2