Reclassifications from Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 03, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost	$ 3
Income tax expense	1
Net of tax	2
Pension Benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost	4
Postretirement Benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost	$ (1)