Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of foreign currency exchange rate derivatives held by the entity at the reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

+ Details

Name:	us-gaap_NumberOfForeignCurrencyDerivativesHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_AUD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_ShortMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PositionAxis=us-gaap_LongMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_CAD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_COP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CurrencyAxis=currency_NOK
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Designated Forward Foreign Currency Exchange Contracts Outstanding (Detail) - Derivatives Designated As Hedging Instruments - Foreign exchange contracts	Dec. 31, 2019 AUD ($) Derivative	Dec. 31, 2019 EUR (€) Derivative	Dec. 31, 2019 COP ($) Derivative	Dec. 31, 2019 CAD ($) Derivative	Dec. 31, 2019 NOK (kr) Derivative
Derivative [Line Items]
Number of Contracts	683	683	683	683	683
Australian Dollars \| Sell
Derivative [Line Items]
Number of Contracts	36	36	36	36	36
Aggregate Notional Amount in Foreign Currency \| $	$ 13,800,000
Euros \| Sell
Derivative [Line Items]
Number of Contracts	385	385	385	385	385
Aggregate Notional Amount in Foreign Currency \| €		€ 617,000,000.0
Euros \| Purchase
Derivative [Line Items]
Number of Contracts	146	146	146	146	146
Aggregate Notional Amount in Foreign Currency \| €		€ 175,400,000
Canadian Dollars \| Sell
Derivative [Line Items]
Number of Contracts	56	56	56	56	56
Aggregate Notional Amount in Foreign Currency \| $				$ 42,500,000
Colombian Pesos \| Sell
Derivative [Line Items]
Number of Contracts	24	24	24	24	24
Aggregate Notional Amount in Foreign Currency \| $			$ 99,850,000,000.0
Norwegian Krone \| Sell
Derivative [Line Items]
Number of Contracts	36	36	36	36	36
Aggregate Notional Amount in Foreign Currency \| kr					kr 90,800,000