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Fair Value Measurements and Financial Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Designated Derivative Instruments [Abstract]
Derivative Assets	$ 94us-gaap_DerivativeAssets	$ 35us-gaap_DerivativeAssets
Derivative Liabilities	7us-gaap_DerivativeLiabilities	19us-gaap_DerivativeLiabilities
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	8	0
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	3
Total asset derivatives	102	35
Total liability derivatives	7	22
Financial Instruments, Owned, at Fair Value [Abstract]
Total other financial instruments	564us-gaap_InvestmentsFairValueDisclosure	858us-gaap_InvestmentsFairValueDisclosure
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	399	685	642
Other Current Assets [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Marketable Securities	200	173
Notes Receivable, Fair Value Disclosure	42	0
Other Current 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	77
Interest Rate Swap Contracts [Member] \| Other Current Assets [Member]
Designated Derivative Instruments [Abstract]
Derivative Assets	1	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	12	20
Interest Rate Swap Contracts [Member] \| Other Liabilities [Member]
Designated Derivative Instruments [Abstract]
Derivative Liabilities	2	1
Foreign Currency Contracts [Member] \| Other Current Assets [Member]
Designated Derivative Instruments [Abstract]
Derivative Assets	21	14
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	0	0
Foreign Currency Contracts [Member] \| Other Accruals [Member]
Designated Derivative Instruments [Abstract]
Derivative Liabilities	4	8
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	3
Foreign Currency Contracts [Member] \| Other Assets [Member]
Designated Derivative Instruments [Abstract]
Derivative Assets	60	0
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	8	0
Foreign Currency Contracts [Member] \| Other Liabilities [Member]
Designated Derivative Instruments [Abstract]
Derivative Liabilities	0	10
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	1	0
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	$ 322	$ 685