Goodwill and Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Details) - USD ($) $ in Millions	Jun. 24, 2016	Sep. 25, 2015
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount	$ 2,153	$ 1,934
Accumulated Amortization	1,493	1,418
Gross Carrying Amount, Non-Amortizable	306	306
Contracts and related customer relationships
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount	1,266	1,167
Accumulated Amortization	960	918
Intellectual property
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount	879	760
Accumulated Amortization	528	496
Gross Carrying Amount, Non-Amortizable	211	210
Franchise rights
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Non-Amortizable	76	76
Other
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount	8	7
Accumulated Amortization	5	4
Gross Carrying Amount, Non-Amortizable	$ 19	$ 20