Derivative Instruments and Hedging Strategies - Summary of Derivatives Designated as Hedging Instruments Outstanding (Detail) - Derivatives Designated As Hedging Instruments - Foreign exchange contracts € in Millions, kr in Millions, $ in Millions, $ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2019 NOK (kr) Derivative	Sep. 30, 2019 EUR (€) Derivative	Sep. 30, 2019 COP ($) Derivative	Sep. 30, 2019 AUD ($) Derivative	Sep. 30, 2019 CAD ($) Derivative
Derivative [Line Items]
Number of Contracts	648	648	648	648	648
Australian Dollars | Sell
Derivative [Line Items]
Number of Contracts	6	6	6	6	6
Aggregate Notional Amount in Foreign Currency | $				$ 2.8
Australian Dollars | Minimum | Sell
Derivative [Line Items]
Maturity	Oct. 31, 2019
Australian Dollars | Maximum | Sell
Derivative [Line Items]
Maturity	Dec. 31, 2019
Canadian Dollars | Sell
Derivative [Line Items]
Number of Contracts	24	24	24	24	24
Aggregate Notional Amount in Foreign Currency | $					$ 28.1
Canadian Dollars | Minimum | Sell
Derivative [Line Items]
Maturity	Oct. 31, 2019
Canadian Dollars | Maximum | Sell
Derivative [Line Items]
Maturity	Sep. 30, 2020
Colombian Pesos | Sell
Derivative [Line Items]
Number of Contracts	12	12	12	12	12
Aggregate Notional Amount in Foreign Currency | $			$ 89,400.0
Colombian Pesos | Minimum | Sell
Derivative [Line Items]
Maturity	Oct. 31, 2019
Colombian Pesos | Maximum | Sell
Derivative [Line Items]
Maturity	Sep. 30, 2020
Euros | Sell
Derivative [Line Items]
Number of Contracts	453	453	453	453	453
Aggregate Notional Amount in Foreign Currency | €		€ 624.2
Euros | Purchase
Derivative [Line Items]
Number of Contracts	150	150	150	150	150
Aggregate Notional Amount in Foreign Currency | €		€ 189.4
Euros | Minimum | Sell
Derivative [Line Items]
Maturity	Oct. 31, 2019
Euros | Minimum | Purchase
Derivative [Line Items]
Maturity	Oct. 31, 2019
Euros | Maximum | Sell
Derivative [Line Items]
Maturity	Sep. 30, 2022
Euros | Maximum | Purchase
Derivative [Line Items]
Maturity	Sep. 30, 2022
Norwegian Krone | Sell
Derivative [Line Items]
Number of Contracts	3	3	3	3	3
Aggregate Notional Amount in Foreign Currency | kr	kr 11.7
Norwegian Krone | Minimum | Sell
Derivative [Line Items]
Maturity	Oct. 31, 2019
Norwegian Krone | Maximum | Sell
Derivative [Line Items]
Maturity	Dec. 31, 2019