Derivatives (Details 5) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012 CounterParties	Jun. 30, 2012	Dec. 31, 2011
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	$ 133	$ 133	$ 135
Fair Value of Derivative Instruments, Liabilities	42	42	49
Year-on-year currency effects impact on net income, including hedging impact	(36)	(62)
Year-on-year derivative and other transaction gains and (losses) impact	42	35
Primary derivative counterparties	6
Derivatives designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	98	98	110
Fair Value of Derivative Instruments, Liabilities	39	39	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	73	73	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	35	35	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	0	0	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	4	4	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	35	35	25
Fair Value of Derivative Instruments, Liabilities	3	3	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	35	35	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	$ 3	$ 3	$ 8