Benefit Plans (Narrative) (Details) $ in Millions	3 Months Ended			9 Months Ended
	Oct. 30, 2021 USD ($)	Jul. 31, 2021 USD ($)	Oct. 31, 2020 USD ($)	Oct. 30, 2021 USD ($) Hour	Oct. 31, 2020 USD ($)
Pension And Other Postretirement Benefit Expense [Abstract]
Number of hours required for participation in defined benefit and defined contribution plans | Hour				1,000
Defined benefit plan, amount of transferred pension plan assets		$ 256
Defined benefit plan, settlement charges	$ 8		$ 26	$ 90	$ 65