Fair Value Measurements (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets:
Investments	$ 56us-gaap_InvestmentsFairValueDisclosure	$ 53us-gaap_InvestmentsFairValueDisclosure
Foreign Exchange Contracts	30	6
Total Assets at Fair Value	86us-gaap_AssetsFairValueDisclosure	59us-gaap_AssetsFairValueDisclosure
Liabilities:
Foreign Exchange Contracts	4	20
Total Liabilities at Fair Value	4us-gaap_LiabilitiesFairValueDisclosure	20us-gaap_LiabilitiesFairValueDisclosure
Fair Value of Long Term Fixed Rate and Variable Rate Debt, excluding Capital Leases
Carrying amount - liability	6,305us-gaap_LongTermDebt	6,173us-gaap_LongTermDebt
Fixed Rate Debt, Excluding Capital Leases
Fair Value of Long Term Fixed Rate and Variable Rate Debt, excluding Capital Leases
Carrying amount - liability	4,132	4,090
Fair value - liability	4,225	4,414
Variable Rate Debt, Excluding Capital Leases
Fair Value of Long Term Fixed Rate and Variable Rate Debt, excluding Capital Leases
Carrying amount - liability	2,173	2,083
Fair value - liability	2,170	2,095
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1)
Assets:
Investments	56	53
Foreign Exchange Contracts	0	0
Total Assets at Fair Value	56	53
Liabilities:
Foreign Exchange Contracts	0	0
Total Liabilities at Fair Value	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Investments	0	0
Foreign Exchange Contracts	30	6
Total Assets at Fair Value	30	6
Liabilities:
Foreign Exchange Contracts	4	20
Total Liabilities at Fair Value	4	20
Significant Unobservable Inputs (Level 3)
Assets:
Investments	0	0
Foreign Exchange Contracts	0	0
Total Assets at Fair Value	0	0
Liabilities:
Foreign Exchange Contracts	0	0
Total Liabilities at Fair Value	$ 0	$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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- Definition

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

+ References

No definition available.

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Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

+ References

No definition available.

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Available-for-Sale Securities

-URI http://asc.fasb.org/extlink&oid=6505594

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph a, f, g

-Article 7

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-Topic 320

-SubTopic 10

-Section 35

-Paragraph 1

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Fair value of financial and nonfinancial obligations.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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

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-Topic 210

-SubTopic 10

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-Subparagraph (SX 210.5-02.22)

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-Name Accounting Standards Codification

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-SubTopic 210

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-Subparagraph (SX 210.7-03.16)

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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