Goodwill and Identifiable Intangible Assets - Amortization Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization Expense	$ 11	$ 10	$ 32	$ 29