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Debt - Credit Facilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]        
Credit facility maximum borrowing capacity $ 4,019,000      
Borrowings outstanding 53,000      
Outstanding letters of credit 19,000      
Current availability 3,947,000      
Ability to increase borrowing capacity subject to currency fluctuations and obtaining additional lender commitments 250,000      
Cash and cash equivalents 676,074 $ 598,086 $ 807,871 $ 1,088,855
Total liquidity $ 4,873,000