Debt (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		1 Months Ended	9 Months Ended
	Jun. 28, 2013	Jun. 29, 2012	Oct. 31, 2012 6.00% senior notes due 2012	Jun. 28, 2013 5.95% senior notes due 2014	Jun. 28, 2013 Commercial paper	Sep. 28, 2012 Commercial paper
Debt Instrument:
Repayments of debt	$ 715	$ 642	$ 714
Debt instrument, interest rate (as a percent)			6.00%	5.95%
Long term debt reclassified to current maturities				300
Ownership percentage in TEGSA	100.00%
Total debt					$ 350	$ 300
Debt instrument, weighted-average interest rate at period end (as a percent)					0.30%	0.40%