Goodwill and Identifiable Intangible Assets - Amortization Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization Expense	$ 10	$ 10	$ 19	$ 21