Fair Value Measurements and Financial Instruments (Details 1) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Designated derivative instruments
Derivative Assets	$ 155	$ 94
Derivative Liabilities	8	7
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	11	8
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0
Total assets derivatives	166	102
Total liabilities derivatives	8	7
Financial Instruments, Owned, at Fair Value [Abstract]
Total other financial instruments	552	564
Bonds Issued By Venezuelan Government [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Available-for-sale Securities, Fair Value Disclosure	408	399	$ 385	$ 685
Other Current Assets [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Marketable Securities	146	200
Note Receivable, Fair Value Disclosure	36	42
Other Current Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Bonds Issued By Venezuelan Government [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Marketable Securities	38
Interest Rate Swap Contracts [Member] | Other Current Assets [Member]
Designated derivative instruments
Derivative Assets	0	1
Interest Rate Swap Contracts [Member] | Other accruals [Member]
Designated derivative instruments
Derivative Liabilities	0	0
Interest Rate Swap Contracts [Member] | Other Assets [Member]
Designated derivative instruments
Derivative Assets	19	12
Interest Rate Swap Contracts [Member] | Other Liabilities [Member]
Designated derivative instruments
Derivative Liabilities	0	2
Foreign Currency Contracts [Member] | Other Current Assets [Member]
Designated derivative instruments
Derivative Assets	34	21
Foreign Currency Contracts [Member] | Other accruals [Member]
Designated derivative instruments
Derivative Liabilities	8	4
Foreign Currency Contracts [Member] | Other Assets [Member]
Designated derivative instruments
Derivative Assets	102	60
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	11	8
Foreign Currency Contracts [Member] | Other Liabilities [Member]
Designated derivative instruments
Derivative Liabilities	0	0
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0
Commodity Contracts [Member] | Other Current Assets [Member]
Designated derivative instruments
Derivative Assets	0	0
Commodity Contracts [Member] | Other accruals [Member]
Designated derivative instruments
Derivative Liabilities	0	1
Estimate of Fair Value Measurement [Member] | Other Assets [Member] | Fair Value, Inputs, Level 2 [Member] | Bonds Issued By Venezuelan Government [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Available-for-sale Securities, Fair Value Disclosure	$ 370	$ 322