Borrowing Facilities and Debt (Narrative) (Details) - USD ($)	1 Months Ended
	Nov. 30, 2015	Oct. 25, 2015	Sep. 30, 2015	Oct. 26, 2014	Oct. 30, 2011
Line of Credit Facility [Line Items]
Amount outstanding		$ 0
Commercial paper program amount					$ 1,500,000,000
Total short-term debt		1,200,000,000		$ 0
Long-term debt		3,350,000,000		1,950,000,000
Long-term debt		3,342,000,000		1,947,000,000
Senior Notes
Line of Credit Facility [Line Items]
Long-term debt			$ 1,800,000,000	1,950,000,000
Total unamortized discount		(8,000,000)		(3,000,000)
Long-term debt				1,947,000,000
Other debt
Line of Credit Facility [Line Items]
Other debt		800,000,000		0
Commercial Paper
Line of Credit Facility [Line Items]
Total short-term debt		0		$ 0
Revolving Credit
Line of Credit Facility [Line Items]
Available revolving credit agreement		1,500,000,000.0
Foreign Line of Credit
Line of Credit Facility [Line Items]
Available revolving credit agreement		$ 67,000,000
2.650% Senior Notes Due 2016 | Senior Notes
Line of Credit Facility [Line Items]
Stated interest rate		2.65%		2.65%
Long-term debt		$ 0		$ 400,000,000
2.650% Senior Notes Due 2016 | Senior Notes
Line of Credit Facility [Line Items]
Short-term debt		$ 400,000,000		$ 0
2.650% Senior Notes Due 2016 | Senior Notes | Subsequent Event
Line of Credit Facility [Line Items]
Short-term debt	$ 400,000,000
Repurchase amount	405,000,000
Loss on repurchase of debt instrument	$ 5,000,000