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Shareholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Equity, Class of Treasury Stock [Line Items]        
Repurchase and retirement of common stock $ 58.3 $ 206.2 $ 159.4 $ 378.5
Number of shares authorized to be repurchased (in shares) 204.0   204.0  
Cash dividend paid during period, per share (in dollars per share) $ 0.65 $ 0.64 $ 1.95 $ 1.92
Common stock excluded from calculation of diluted earnings per share (shares) 1.0 1.4 1.4 1.6
Common Stock        
Equity, Class of Treasury Stock [Line Items]        
Repurchase and retirement of common stock (shares) 0.5 1.7 1.4 3.2