Goodwill and Identifiable Intangible Assets - Amortization Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization Expense	$ 10	$ 13	$ 29	$ 34