Derivative Financial Instruments and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended																																												0 Months Ended								0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Other current assets [Member]	Dec. 31, 2013 Other current assets [Member]	Sep. 30, 2014 Other long-term assets [Member]	Dec. 31, 2013 Other long-term assets [Member]	Sep. 30, 2014 Other current liabilities [Member]	Dec. 31, 2013 Other current liabilities [Member]	Sep. 30, 2014 Other long-term liabilities [Member]	Dec. 31, 2013 Other long-term liabilities [Member]	Sep. 30, 2014 Currency exchange contracts [Member] Other current assets [Member]	Dec. 31, 2013 Currency exchange contracts [Member] Other current assets [Member]	Sep. 30, 2014 Currency exchange contracts [Member] Other current liabilities [Member]	Dec. 31, 2013 Currency exchange contracts [Member] Other current liabilities [Member]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 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] 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]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 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]	Dec. 31, 2013 Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Floating-to-fixed interest rate swaps [Member]	Sep. 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]	Sep. 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]	Sep. 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]	Sep. 30, 2014 Minimum [Member] Derivatives designated as hedges [Member] Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Dec. 31, 2013 Minimum [Member] Derivatives designated as hedges [Member] Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Sep. 30, 2014 Minimum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Currency exchange contracts [Member]	Dec. 31, 2013 Minimum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Currency exchange contracts [Member]	Sep. 30, 2014 Minimum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Commodity contracts [Member]	Dec. 31, 2013 Minimum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Commodity contracts [Member]	Sep. 30, 2014 Minimum [Member] Derivatives not designated as hedges [Member] Currency exchange contracts [Member]	Dec. 31, 2013 Minimum [Member] Derivatives not designated as hedges [Member] Currency exchange contracts [Member]	Sep. 30, 2014 Maximum [Member] Derivatives designated as hedges [Member] Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Dec. 31, 2013 Maximum [Member] Derivatives designated as hedges [Member] Fair Value Hedging [Member] Fixed-to-floating interest rate swaps [Member]	Sep. 30, 2014 Maximum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Currency exchange contracts [Member]	Dec. 31, 2013 Maximum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Currency exchange contracts [Member]	Sep. 30, 2014 Maximum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Commodity contracts [Member]	Dec. 31, 2013 Maximum [Member] Derivatives designated as hedges [Member] Cash Flow Hedging [Member] Commodity contracts [Member]	Sep. 30, 2014 Maximum [Member] Derivatives not designated as hedges [Member] Currency exchange contracts [Member]	Dec. 31, 2013 Maximum [Member] Derivatives not designated as hedges [Member] Currency exchange contracts [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument			$ 7	$ 13	$ 55	$ 36									$ 0	$ 1	$ 53	$ 36					$ 0	$ 0			$ 7	$ 12	$ 2	$ 0					$ 0	$ 0	$ 0	$ 0
Derivative liability designated as hedging instrument							3	4	32	76									0	0	31	76			1	0					3	3	1	0					0	0	0	0
Derivative, Notional Amount																																											3,440	3,090		300	446	393	2	1	4,444	4,277
Derivative, Term of Contract																																													6 months								3 years	3 months	1 month	12 months	1 month	1 month	1 month	1 month	20 years	20 years	36 months	36 months	12 months	12 months	12 months	12 months
Derivatives not designated as hedges
Derivative instruments not designated as hedging instruments, asset, at fair value			35	22							35	22
Derivative instruments not designated as hedging instruments, liability, at fair value							37	26					37	26
Debt denominated in foreign currency designated as non-derivative net investment hedging instrument	$ 91	$ 95
Percentage of intercompany balance sheet exposure	100.00%