Components of Net Periodic Pension Benefit Cost and Net Postretirement Benefit Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Nov. 01, 2014	Nov. 02, 2013
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 4	$ 11	$ 11
Interest cost	7	6	21	19
Expected return on plan assets	(9)	(10)	(28)	(30)
Amortization of net loss (gain)	5	4	12	12
Net benefit expense (income)	6	4	16	12
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)	(1)	(1)	(2)	(2)
Net benefit expense (income)	$ (1)	$ (1)	$ (2)	$ (2)