Debt (Narrative) (Details) - USD ($)	6 Months Ended
	Apr. 01, 2017	Oct. 01, 2016
Line of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,250,000,000.00
Amount available for borrowing under credit facility	739,000,000
Commercial Paper [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	500,000,000
Commercial Paper	$ 500,000,000	$ 0
Short-term Debt, Weighted Average Interest Rate	1.27%
Debt Instrument, Term	45 days
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 8,000,000
Bilateral Letters Of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 82,000,000