Goodwill and Intangible Assets (Details 2) - USD ($) $ in Millions	3 Months Ended
	Dec. 25, 2015	Dec. 26, 2014	Sep. 25, 2015
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Amortizable	$ 2,132		$ 2,049
Accumulated Amortization	1,510		1,492
Gross Carrying Amount, Non-Amortizable	305		306
Intangible asset amortization expense and estimated aggregate amortization expense ($ in millions):
Intangible asset amortization expense	23	$ 21
Estimated aggregate amortization expense, remainder of 2014	89
Estimated aggregate amortization expense, 2015	92
Estimated aggregate amortization expense, 2016	86
Estimated aggregate amortization expense, 2017	80
Estimated aggregate amortization expense, 2018 and thereafter	275
Contracts and related customer relationships
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Amortizable	1,287		1,281
Accumulated Amortization	1,002		991
Intellectual property
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Amortizable	836		760
Accumulated Amortization	503		496
Gross Carrying Amount, Non-Amortizable	210		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, Amortizable	9		8
Accumulated Amortization	5		5
Gross Carrying Amount, Non-Amortizable	$ 19		$ 20