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

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

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Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

+ 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)(1)
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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
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Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Financing Arrangements and Derivative Financial Instruments - Schedule of Fair Values for Foreign Currency Contracts (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Accounts receivable
Derivative Instruments and Hedging Activities Disclosures
Fair value - asset, not designated as hedging instruments	$ 14		$ 14		$ 10
Fair value - asset, designated as hedging instruments	2		2		5
Other current liabilities
Derivative Instruments and Hedging Activities Disclosures
Fair value - liability, not designated as hedging instruments	(7)		(7)		(10)
Fair value - liability, designated as hedging instruments	(2)		(2)		(1)
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures
Foreign currency derivatives, notional amount	1,221		1,221		1,094
Foreign currency derivatives, net transaction gains (losses)	5	$ (28)	(18)	$ 30
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures
Foreign currency derivatives, notional amount	$ 167		$ 167		$ 168