Fair Value Measurements (Details) (Fair value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Apr. 13, 2014	Sep. 29, 2013
Level 1 Inputs [Member]
Assets, Fair Value Disclosure [Abstract]
Total	$ 31	$ 73
Level 2 Inputs [Member]
Assets, Fair Value Disclosure [Abstract]
Total	1,121	1,156
Total [Member]
Assets, Fair Value Disclosure [Abstract]
Total	1,152	1,229
Money Market Funds [Member] | Level 1 Inputs [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Equivalents	31	73
Money Market Funds [Member] | Total [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Equivalents	31	73
Commercial Paper [Member] | Level 2 Inputs [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Equivalents	64	104
Marketable Securities - Available-for-sale	110
Commercial Paper [Member] | Total [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Equivalents	64	104
Marketable Securities - Available-for-sale	110
Municipal Notes Bonds [Member] | Level 2 Inputs [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Equivalents		17
Marketable Securities - Available-for-sale	908	1,010
Municipal Notes Bonds [Member] | Total [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Equivalents		17
Marketable Securities - Available-for-sale	908	1,010
Corporate Debt Securities [Member] | Level 2 Inputs [Member]
Assets, Fair Value Disclosure [Abstract]
Marketable Securities - Available-for-sale	22	5
Corporate Debt Securities [Member] | Total [Member]
Assets, Fair Value Disclosure [Abstract]
Marketable Securities - Available-for-sale	22	5
Variable Rate Demand Obligation [Member] | Level 2 Inputs [Member]
Assets, Fair Value Disclosure [Abstract]
Marketable Securities - Available-for-sale	17	20
Variable Rate Demand Obligation [Member] | Total [Member]
Assets, Fair Value Disclosure [Abstract]
Marketable Securities - Available-for-sale	$ 17	$ 20