Goodwill and Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011
Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount, Amortizable	$ 2,194	$ 2,192
Accumulated Amortization	1,689	1,722
Gross Carrying Amount, Non-Amortizable	299	301
Intangible asset amortization expense and estimated aggregate amortization expense ($ in millions):
Intangible asset amortization expense	99	102	98
Estimated aggregate amortization expense, 2014	92
Estimated aggregate amortization expense, 2015	74
Estimated aggregate amortization expense, 2016	67
Estimated aggregate amortization expense, 2017	58
Estimated aggregate amortization expense, 2018 and thereafter	214
Contracts and related customer relationships
Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount, Amortizable	1,531	1,604
Accumulated Amortization	1,199	1,245
Intellectual property
Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount, Amortizable	623	552
Accumulated Amortization	477	468
Gross Carrying Amount, Non-Amortizable	223	224
Other
Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount, Amortizable	40	36
Accumulated Amortization	13	9
Franchise rights
Intangible Assets, Excluding Goodwill [Line Items]
Gross Carrying Amount, Non-Amortizable	$ 76	$ 77