Derivative Financial Instruments and Risk Management (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value
Asset Fair Value	$ 119	$ 138
Liability Fair Value	(12)	(10)
Designated derivatives
Derivatives, Fair Value
Asset (Liability) Fair Value	102	116
Designated derivatives | Interest rate contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	108	122
Designated derivatives | Interest rate contracts | Accrued expenses
Derivatives, Fair Value
Liability Fair Value	(6)	(6)
Undesignated derivatives
Derivatives, Fair Value
Asset (Liability) Fair Value	5	12
Undesignated derivatives | Foreign exchange contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	4	7
Undesignated derivatives | Foreign exchange contracts | Accrued expenses
Derivatives, Fair Value
Liability Fair Value	(6)	(4)
Undesignated derivatives | Cross currency contracts | Other assets
Derivatives, Fair Value
Asset Fair Value	$ 7	$ 9