Fair Value Measurements and Financial Instruments (Details 1) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Designated derivative instruments
Derivative Assets	$ 139	$ 94
Derivative Liabilities	10	7
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	10	8
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0
Total assets derivatives	149	102
Total liabilities derivatives	10	7
Financial Instruments, Owned, at Fair Value [Abstract]
Total other financial instruments	677	564
Bonds Issued By Venezuelan Government [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Available-for-sale Securities, Fair Value Disclosure	421	399	$ 447	$ 685
Other Current Assets [Member]
Financial Instruments, Owned, at Fair Value [Abstract]
Marketable Securities	248	200
Notes Receivable, Fair Value Disclosure	38	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	30
Interest Rate Swap Contracts [Member] | Other Current Assets [Member]
Designated derivative instruments
Derivative Assets	1	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	12	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	22	21
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	3	0
Foreign Currency Contracts [Member] | Other accruals [Member]
Designated derivative instruments
Derivative Liabilities	10	4
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0
Foreign Currency Contracts [Member] | Other Assets [Member]
Designated derivative instruments
Derivative Assets	103	60
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	7	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	1	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	$ 391	$ 322