Financing Arrangements (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Total notes payable	$ 1,408	$ 20
Commercial paper
Short-term Debt [Line Items]
Total notes payable	1,196	0
Short-term borrowings to banks
Short-term Debt [Line Items]
Total notes payable	$ 212	$ 20