Derivative Financial Instruments and Risk Management (Details 2) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value
Asset Fair Value	$ 17	$ 22
Liability Fair Value	(116)	(68)
Designated derivatives
Derivatives, Fair Value
Asset (Liability) Fair Value	(94)	(49)
Designated derivatives | Interest rate contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	2	3
Designated derivatives | Interest rate contracts | Accrued expenses
Derivatives, Fair Value
Liability Fair Value	(3)	(2)
Designated derivatives | Cross currency contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	1	7
Designated derivatives | Cross currency contracts | Accrued expenses
Derivatives, Fair Value
Liability Fair Value	(94)	(57)
Undesignated derivatives
Derivatives, Fair Value
Asset (Liability) Fair Value	(5)	3
Undesignated derivatives | Foreign exchange contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	14	12
Undesignated derivatives | Foreign exchange contracts | Accrued expenses
Derivatives, Fair Value
Liability Fair Value	$ (19)	$ (9)