Accumulated Other Comprehensive Loss (Reclassifications from Accumulated Other Comprehensive Loss) (Details) $ in Millions	9 Months Ended
	Nov. 03, 2018 USD ($)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost (see Note 12)	$ 8
Income tax benefit	(2)
Net of tax	6
Pension Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost (see Note 12)	9
Postretirement Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost (see Note 12)	$ (1)