Identified Intangible Assets, Indefinite-Lived Intangible Asset (Detail) - USD ($) $ in Millions	Sep. 26, 2015	Dec. 27, 2014
Indefinite-lived Intangible Assets [Line Items]
Gross Assets, Not Subject to Amortization	$ 970	$ 991
Acquisition-related Trade Names [Member]
Indefinite-lived Intangible Assets [Line Items]
Gross Assets, Not Subject to Amortization	767	788
Other Intangible Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Gross Assets, Not Subject to Amortization	$ 203	$ 203