Derivative Financial Instruments and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended										3 Months Ended						3 Months Ended			3 Months Ended										3 Months Ended					3 Months Ended										3 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Other current assets [Member]	Dec. 31, 2013 Other current assets [Member]	Jun. 30, 2014 Other long-term assets [Member]	Dec. 31, 2013 Other long-term assets [Member]	Jun. 30, 2014 Other current liabilities [Member]	Dec. 31, 2013 Other current liabilities [Member]	Jun. 30, 2014 Other long-term liabilities [Member]	Dec. 31, 2013 Other long-term liabilities [Member]	Jun. 30, 2014 Currency exchange contracts [Member]	Dec. 31, 2013 Currency exchange contracts [Member]	Jun. 30, 2014 Currency exchange contracts [Member] Other current assets [Member]	Dec. 31, 2013 Currency exchange contracts [Member] Other current assets [Member]	Jun. 30, 2014 Currency exchange contracts [Member] Other current liabilities [Member]	Dec. 31, 2013 Currency exchange contracts [Member] Other current liabilities [Member]	Jun. 30, 2014 Commodity contracts [Member]	Jun. 30, 2014 Commodity contracts [Member] Other current assets [Member]	Jun. 30, 2014 Commodity contracts [Member] Other current liabilities [Member]	Jun. 30, 2014 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Dec. 31, 2013 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Jun. 30, 2014 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other current assets [Member]	Dec. 31, 2013 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other current assets [Member]	Jun. 30, 2014 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other long-term assets [Member]	Dec. 31, 2013 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other long-term assets [Member]	Jun. 30, 2014 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other current liabilities [Member]	Dec. 31, 2013 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other current liabilities [Member]	Jun. 30, 2014 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other long-term liabilities [Member]	Dec. 31, 2013 Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member] Other long-term liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Floating-to-fixed interest rate swaps [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Floating-to-fixed interest rate swaps [Member] Other current assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Floating-to-fixed interest rate swaps [Member] Other long-term assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Floating-to-fixed interest rate swaps [Member] Other current liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Floating-to-fixed interest rate swaps [Member] Other long-term liabilities [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Currency exchange contracts [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Currency exchange contracts [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other current assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other current assets [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other long-term assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other long-term assets [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other current liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other current liabilities [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other long-term liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Currency exchange contracts [Member] Other long-term liabilities [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Commodity contracts [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Commodity contracts [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Commodity contracts [Member] Other current assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Commodity contracts [Member] Other current assets [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Commodity contracts [Member] Other long-term assets [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Commodity contracts [Member] Other long-term assets [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Commodity contracts [Member] Other current liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Commodity contracts [Member] Other current liabilities [Member]	Jun. 30, 2014 Cash Flow Hedging [Member] Commodity contracts [Member] Other long-term liabilities [Member]	Dec. 31, 2013 Cash Flow Hedging [Member] Commodity contracts [Member] Other long-term liabilities [Member]	Jun. 30, 2014 Derivatives designated as hedges [Member] Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Dec. 31, 2013 Derivatives designated as hedges [Member] Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Dec. 31, 2013 Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Floating-to-fixed interest rate swaps [Member]	Jun. 30, 2014 Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Currency exchange contracts [Member]	Dec. 31, 2013 Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Currency exchange contracts [Member]	Jun. 30, 2014 Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Commodity contracts [Member]	Dec. 31, 2013 Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Commodity contracts [Member]	Jun. 30, 2014 Derivatives not designated as hedges [Member] Currency exchange contracts [Member]	Dec. 31, 2013 Derivatives not designated as hedges [Member] Currency exchange contracts [Member]	Jun. 30, 2014 Derivatives not designated as hedges [Member] Commodity contracts [Member]
Derivatives, Fair Value [Line Items]
Notional amount																																																							$ 3,440	$ 3,090	$ 300	$ 490	$ 393	$ 1	$ 1	$ 4,894	$ 4,277	$ 14
Derivatives designated as hedges
Derivative asset designated as hedging instrument			14	13	60	36																0	1	60	36						0	0					14	12	0	0							0	0	0	0
Derivative liability designated as hedging instrument							4	4	26	76																0	0	26	76				1	0							4	3	0	0							0	0	0	0
Terms of derivatives designated as hedges																				3 to 20 years	3 months to 20 years									6 months					1 to 36 months	12 to 36 months									1 to 12 months	1 to 12 months
Derivatives not designated as hedges
Derivative instruments not designated as hedging instruments, asset, at fair value			18	22									18	22				0
Derivative instruments not designated as hedging instruments, liability, at fair value							19	26							19	26			0
Terms of derivatives not designated as hedges											1 to 12 months	1 to 12 months					1 to 12 months
Debt denominated in foreign currency designated as non-derivative net investment hedging instrument	$ 99	$ 95
Percentage of intercompany balance sheet exposure	100.00%