Operating Leases (Detail 1) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Oct. 30, 2015	Oct. 31, 2014	Oct. 30, 2015	Oct. 31, 2014
Leases [Abstract]
Rental expense for facilities and equipment	$ 14	$ 10	$ 42	$ 30

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration