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Shareholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Thousands
1 Months Ended 3 Months Ended
Dec. 31, 2020
May 31, 2018
Mar. 31, 2021
Mar. 31, 2020
Dec. 01, 2020
May 08, 2018
Stockholders Equity Note Disclosure [Line Items]            
Dividends (in dollars per share)     $ 0.20 $ 0.19    
Dividends payable $ 33,200,000   $ 33,200,000      
May 2018 Share Repurchase Program [Member]            
Stockholders Equity Note Disclosure [Line Items]            
Repurchase of shares of our common stock up to a maximum aggregate value           $ 750,000,000.0
Common stock authorized for repurchase, expiration date   May 31, 2021        
Share repurchase program remaining available amount     90,100,000      
December 2020 Share Repurchase Program            
Stockholders Equity Note Disclosure [Line Items]            
Repurchase of shares of our common stock up to a maximum aggregate value         $ 750,000,000.0  
Common stock authorized for repurchase, expiration date Dec. 31, 2025          
Share repurchase program remaining available amount     $ 750,000,000.0      
Stock Repurchased During Period, Shares     200