Derivatives (Details 5) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012 CounterParties	Sep. 30, 2012	Dec. 31, 2011
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	$ 80	$ 80	$ 135
Fair Value of Derivative Instruments, Liabilities	72	72	49
Year-on-year currency effects impact on net income, including hedging impact	(42)	(104)
Year-on-year derivative and other transaction gains and (losses) impact	3	38
Number of primary derivative counterparties	6
Number of master netting agreements supported by primary counterparty's parent guarantee	1
Derivatives designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	66	66	110
Fair Value of Derivative Instruments, Liabilities	55	55	41
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	40	40	82
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	54	54	34
Derivatives designated as hedging instruments | Commodity price swap contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	1	1	0
Derivatives designated as hedging instruments | Commodity price swap contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	1	1	7
Derivatives designated as hedging instruments | Interest rate swap contracts | Other assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	25	25	28
Derivatives designated as hedging instruments | Interest rate swap contracts | Other liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	0	0	0
Derivatives not designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	14	14	25
Fair Value of Derivative Instruments, Liabilities	17	17	8
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	14	14	25
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	$ 17	$ 17	$ 8