Reclassifications from Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Aug. 02, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost	$ 6
Income tax expense	2
Net of tax	4
Pension Benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost	7
Postretirement Benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost	$ (1)