Goodwill and Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 28, 2014	Mar. 29, 2013	Mar. 28, 2014	Mar. 29, 2013	Sep. 27, 2013
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Amortizable	$ 2,099		$ 2,099		$ 2,083
Accumulated Amortization	1,623		1,623		1,591
Gross Carrying Amount, Non-Amortizable	297		297		299
Intangible asset amortization expense and estimated aggregate amortization expense ($ in millions):
Intangible asset amortization expense	24	26	47	49
Estimated aggregate amortization expense, remainder of 2014	46		46
Estimated aggregate amortization expense, 2015	74		74
Estimated aggregate amortization expense, 2016	68		68
Estimated aggregate amortization expense, 2017	60		60
Estimated aggregate amortization expense, 2018 and thereafter	228		228
Contracts and related customer relationships
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Amortizable	1,438		1,438		1,420
Accumulated Amortization	1,126		1,126		1,101
Intellectual property
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Amortizable	621		621		623
Accumulated Amortization	481		481		477
Gross Carrying Amount, Non-Amortizable	221		221		223
Other
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Amortizable	40		40		40
Accumulated Amortization	16		16		13
Franchise rights
Gross carrying amount and accumulated amortization of intangible assets:
Gross Carrying Amount, Non-Amortizable	$ 76		$ 76		$ 76