Pension and Postretirement Plans (Net Benefit Expense (Income)) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5	$ 5	$ 15	$ 14
Interest cost	7	8	20	21
Expected return on plan assets	(9)	(10)	(27)	(29)
Amortization of net loss (gain)	3	3	9	9
Net benefit expense (income)	$ 6	$ 6	17	15
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of net loss (gain)			(1)	(1)
Net benefit expense (income)			$ (1)	$ (1)