Derivative Financial Instruments and Hedging Activities (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2015	Dec. 31, 2014
Derivatives not designated as hedges
Debt denominated in foreign currency designated as non-derivative net investment hedging instrument	$ 82	$ 84
Percentage of intercompany balance sheet exposure	100.00%
Other current assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	$ 10	8
Derivatives not designated as hedges
Derivative instruments not designated as hedging instruments, asset, at fair value	25	47
Other noncurrent assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	82	85
Other current liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	4	5
Derivatives not designated as hedges
Derivative instruments not designated as hedging instruments, liability, at fair value	28	52
Other noncurrent liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	12	13
Currency exchange contracts [Member] \| Other current assets [Member]
Derivatives not designated as hedges
Derivative instruments not designated as hedging instruments, asset, at fair value	25	47
Currency exchange contracts [Member] \| Other current liabilities [Member]
Derivatives not designated as hedges
Derivative instruments not designated as hedging instruments, liability, at fair value	28	52
Fair value hedging [Member] \| Fixed-to-floating interest rate swaps [Member] \| Other current assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	0	0
Fair value hedging [Member] \| Fixed-to-floating interest rate swaps [Member] \| Other noncurrent assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	81	84
Fair value hedging [Member] \| Fixed-to-floating interest rate swaps [Member] \| Other current liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	0	0
Fair value hedging [Member] \| Fixed-to-floating interest rate swaps [Member] \| Other noncurrent liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	10	10
Cash Flow Hedging [Member] \| Currency exchange contracts [Member] \| Other current assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	10	8
Cash Flow Hedging [Member] \| Currency exchange contracts [Member] \| Other noncurrent assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	1	1
Cash Flow Hedging [Member] \| Currency exchange contracts [Member] \| Other current liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	4	5
Cash Flow Hedging [Member] \| Currency exchange contracts [Member] \| Other noncurrent liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	2	3
Cash Flow Hedging [Member] \| Commodity contracts [Member] \| Other current assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	0	0
Cash Flow Hedging [Member] \| Commodity contracts [Member] \| Other noncurrent assets [Member]
Derivatives designated as hedges
Derivative asset designated as hedging instrument	0	0
Cash Flow Hedging [Member] \| Commodity contracts [Member] \| Other current liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	0	0
Cash Flow Hedging [Member] \| Commodity contracts [Member] \| Other noncurrent liabilities [Member]
Derivatives designated as hedges
Derivative liability designated as hedging instrument	0	0
Derivatives designated as hedges [Member] \| Fair value hedging [Member] \| Fixed-to-floating interest rate swaps [Member]
Derivatives designated as hedges
Derivative, Notional Amount	3,440	3,440
Derivatives designated as hedges [Member] \| Cash Flow Hedging [Member] \| Currency exchange contracts [Member]
Derivatives designated as hedges
Derivative, Notional Amount	533	432
Derivatives designated as hedges [Member] \| Cash Flow Hedging [Member] \| Commodity contracts [Member]
Derivatives designated as hedges
Derivative, Notional Amount	1	1
Derivatives not designated as hedges [Member] \| Currency exchange contracts [Member]
Derivatives designated as hedges
Derivative, Notional Amount	$ 3,975	$ 4,447
Minimum [Member] \| Derivatives designated as hedges [Member] \| Fair value hedging [Member] \| Fixed-to-floating interest rate swaps [Member]
Derivatives designated as hedges
Derivative, Term of Contract	2 years	2 years
Minimum [Member] \| Derivatives designated as hedges [Member] \| Cash Flow Hedging [Member] \| Currency exchange contracts [Member]
Derivatives designated as hedges
Derivative, Term of Contract	1 month	1 month
Minimum [Member] \| Derivatives designated as hedges [Member] \| Cash Flow Hedging [Member] \| Commodity contracts [Member]
Derivatives designated as hedges
Derivative, Term of Contract	1 month	1 month
Minimum [Member] \| Derivatives not designated as hedges [Member] \| Currency exchange contracts [Member]
Derivatives designated as hedges
Derivative, Term of Contract	1 month	1 month
Maximum [Member] \| Derivatives designated as hedges [Member] \| Fair value hedging [Member] \| Fixed-to-floating interest rate swaps [Member]
Derivatives designated as hedges
Derivative, Term of Contract	20 years	19 years
Maximum [Member] \| Derivatives designated as hedges [Member] \| Cash Flow Hedging [Member] \| Currency exchange contracts [Member]
Derivatives designated as hedges
Derivative, Term of Contract	36 months	36 months
Maximum [Member] \| Derivatives designated as hedges [Member] \| Cash Flow Hedging [Member] \| Commodity contracts [Member]
Derivatives designated as hedges
Derivative, Term of Contract	12 months	12 months
Maximum [Member] \| Derivatives not designated as hedges [Member] \| Currency exchange contracts [Member]
Derivatives designated as hedges
Derivative, Term of Contract	12 months	12 months

Derivatives designated as hedges.

No definition available.

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- Definition

Derivatives not designated as hedges.

+ References

No definition available.

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- Definition

Percentage of intercompany balance sheet exposure.

+ References

No definition available.

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4D

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4D

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

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-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

+ References

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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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