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Fair Value Measurements - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Fair Value, Measurements, Nonrecurring          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Asset impairment charges $ 0 $ 0 $ 0 $ 0  
Not Designated as Hedging Instrument          
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]          
Derivatives designated as hedging instruments 0   0   $ 0
Gains and losses recognized in other non-operating items, net $ 6,800,000 $ 5,800,000 $ (1,700,000) $ 2,600,000