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
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No definition available.

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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 liabilities designated as cash flow hedging instruments.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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-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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-Name Accounting Standards Codification
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-Section 50
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Financing Arrangements and Derivative Financial Instruments - Fair Values for Foreign Currency Contracts (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures
Foreign currency derivatives, notional amount	$ 1,121		$ 1,121		$ 1,812
Foreign currency derivatives, net transaction gains (losses)	(10)	$ (15)	(55)	$ (33)
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures
Foreign currency derivatives, notional amount	261		261		293
Accounts receivable
Derivative Instruments and Hedging Activities Disclosures
Fair value - asset, not designated as hedging instruments	6		6		30
Fair value - asset, designated as hedging instruments	0		0		9
Other current liabilities
Derivative Instruments and Hedging Activities Disclosures
Fair value - liability, not designated as hedging instruments	(8)		(8)		(18)
Fair value - liability, designated as hedging instruments	(10)		(10)		0
Other assets
Derivative Instruments and Hedging Activities Disclosures
Fair value - asset, designated as hedging instruments	0		0		2
Other long term liabilities
Derivative Instruments and Hedging Activities Disclosures
Fair value - liability, designated as hedging instruments	$ (2)		$ (2)		$ 0