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Derivative Financial Instruments - Additional Information (Detail) - Derivatives Not Designated as Hedging Instrument [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivatives Fair Value [Line Items]
Foreign currency forward contracts, notional amount	$ 20,000,000	$ 37,000,000	$ 76,000,000
Other Expense [Member]
Derivatives Fair Value [Line Items]
Foreign currency forward contracts, gain (loss) related to changes in fair value	(1,000,000)	1,000,000	12,000,000
Prepaid and Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Foreign currency forward contracts, assets			1,000,000
Prepaid and Other Current Assets [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Foreign currency forward contracts, assets	1,000,000	1,000,000
Other Current Liabilities [Member] | Maximum [Member]
Derivatives Fair Value [Line Items]
Foreign currency forward contracts, liability	$ 1,000,000	$ 1,000,000	$ 1,000,000

X

- 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

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- Definition

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+ References

No definition available.

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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.

+ Details

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- Definition

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

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 2
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