Goodwill and Identifiable Intangible Assets - Estimated Amortization Expense (Detail) (USD $) In Millions, unless otherwise specified	Sep. 26, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Estimated amortization expense, 2014	$ 42
Estimated amortization expense, 2015	41
Estimated amortization expense, 2016	34
Estimated amortization expense, 2017	32
Estimated amortization expense, 2018	$ 26