Goodwill and Identifiable Intangible Assets - Estimated Amortization Expense (Detail) $ in Millions	Sep. 25, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated amortization expense, 2015	$ 38
Estimated amortization expense, 2016	38
Estimated amortization expense, 2017	35
Estimated amortization expense, 2018	30
Estimated amortization expense, 2019	$ 27