Components of Net Periodic Pension Benefit Cost and Net Postretirement Benefit Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 3	$ 8	$ 7
Interest cost	7	7	14	13
Expected return on plan assets	(9)	(10)	(19)	(20)
Amortization of net loss (gain)	3	4	7	8
Net benefit expense (income)	5	4	10	8
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	0	0	0	0
Expected return on plan assets	0	0	0	0
Amortization of net loss (gain)	0	0	(1)	(1)
Net benefit expense (income)	$ 0	$ 0	$ (1)	$ (1)