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Stock Option Plans - Additional information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Mar. 01, 2024
Mar. 15, 2023
May 10, 2022
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Stock Option Plans [Line Items]                  
Compensation expense related to stock option grants       $ 10.5 $ 15.1 $ 7.8 $ 7.7 $ 25.6 $ 15.5
Total intrinsic value of options exercised               173.7 $ 123.8
Total unrecognized compensation cost related to nonvested options       $ 149.9       $ 149.9  
Weighted average period, years               4 years  
Black-Scholes Option Pricing Model [Member]                  
Stock Option Plans [Line Items]                  
Weighted average fair value per option for all options               $ 69.55 $ 46.48
Long Term Incentive Plan [Member]                  
Stock Option Plans [Line Items]                  
Stock option granted, Share pool     13,500,000            
Shares against the pool     3.8            
Maximum number of shares available     3,500,000         2,500,000  
Number Of Periods Options Expire               7 years  
Shares available for grant       10,900,000       10,900,000  
Long Term Incentive Plan [Member] | Officer and Key Employees [Member]                  
Stock Option Plans [Line Items]                  
Shares available for grant 1,044,000 1,131,000              
Stock options granted, exercise percentage, on the third anniversary date of the grant 34.00% 34.00%              
Stock options granted, exercise percentage, on the fourth anniversary date of the grant 33.00% 33.00%              
Stock options granted, exercise percentage, on the fifth anniversary date of the grant 33.00% 33.00%              
Long Term Incentive Plan [Member] | Maximum [Member]                  
Stock Option Plans [Line Items]                  
Minimum exercise price of stock options, percent of fair market value of a share of common stock on the date of grant               100.00%  
Maximum period for the exercise of stock options, years               7 years 7 years
Long Term Incentive Plan [Member] | Minimum [Member]                  
Stock Option Plans [Line Items]                  
Period of service from grant date stock options awarded not subject to forfeiture   2 years             2 years
Long Term Incentive Plan [Member] | Minimum [Member] | Executive Officer [Member]                  
Stock Option Plans [Line Items]                  
Minimum age of employee with not subject to award forfeiture on condition compliance               62 years 55 years