Fair Value Measurements and Financial Instruments (Details 1) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Designated Derivative Instruments [Abstract]
Derivative Assets	$ 138	$ 94
Derivative Liabilities	5	7
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	13	8
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0
Total asset derivatives	151	102
Total liability derivatives	5	7
Financial Instruments, Owned, at Fair Value [Abstract]
Total other financial instruments	61	564
Bonds Issued By Venezuelan Government [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	399	$ 685
Other Current Assets [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Marketable Securities	61	200
Notes Receivable, Fair Value Disclosure	0	42
Interest Rate Swap Contracts [Member] | Other Current Assets [Member]
Designated Derivative Instruments [Abstract]
Derivative Assets	0	1
Interest Rate Swap Contracts [Member] | Other Accruals [Member]
Designated Derivative Instruments [Abstract]
Derivative Liabilities	0	0
Interest Rate Swap Contracts [Member] | Other Assets [Member]
Designated Derivative Instruments [Abstract]
Derivative Assets	7	12
Interest Rate Swap Contracts [Member] | Other Liabilities [Member]
Designated Derivative Instruments [Abstract]
Derivative Liabilities	0	2
Foreign Currency Contracts [Member] | Other Current Assets [Member]
Designated Derivative Instruments [Abstract]
Derivative Assets	131	21
Foreign Currency Contracts [Member] | Other Accruals [Member]
Designated Derivative Instruments [Abstract]
Derivative Liabilities	5	4
Foreign Currency Contracts [Member] | Other Assets [Member]
Designated Derivative Instruments [Abstract]
Derivative Assets	0	60
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	13	8
Foreign Currency Contracts [Member] | Other Liabilities [Member]
Designated Derivative Instruments [Abstract]
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 [Abstract]
Derivative Assets	0	0
Commodity Contracts [Member] | Other Accruals [Member]
Designated Derivative Instruments [Abstract]
Derivative Liabilities	0	1
Estimate of Fair Value Measurement [Member] | Other Assets [Member] | Bonds Issued By Venezuelan Government [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Available-for-sale Securities, Fair Value Disclosure	$ 0	$ 322