Derivative Financial Instruments and Risk Management (Details 2) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value
Asset Fair Value	$ 95	$ 101
Liability Fair Value	(11)	(23)
Designated derivatives
Derivatives, Fair Value
Asset (Liability) Fair Value	59	71
Designated derivatives | Interest rate contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	64	79
Designated derivatives | Interest rate contracts | Accrued expenses
Derivatives, Fair Value
Liability Fair Value	(5)	(8)
Undesignated derivatives
Derivatives, Fair Value
Asset (Liability) Fair Value	25	7
Undesignated derivatives | Foreign exchange contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	5	5
Undesignated derivatives | Foreign exchange contracts | Accrued expenses
Derivatives, Fair Value
Liability Fair Value	(6)	(15)
Undesignated derivatives | Cross currency contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	$ 26	$ 17