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Restricted Stock, Performance Share and Cash Awards - Additional Information (Detail)
$ in Millions
 3 Months Ended
Mar. 15, 2023
USD ($)
shares
May 10, 2022
shares
Mar. 15, 2022
USD ($)
shares
Mar. 31, 2023
USD ($)
TIME
shares
Mar. 31, 2022
USD ($)
shares
Dec. 31, 2022
shares
Mar. 31, 2021
shares
Mar. 16, 2021
USD ($)
shares
Mar. 12, 2020
USD ($)
shares
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Share-based compensation, shares outstanding | shares       8,800,000   8,300,000      
Officer and Key Employees [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Performance awards period, years       1 year          
Restricted Stock Units (RSUs) [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Period of service from grant date stock options awarded not subject to forfeiture       2 years 2 years        
Restricted stock or unit expense       $ 9.7 $ 7.6        
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member] | Minimum [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Minimum age of employee with not subject to award forfeiture on condition compliance       55 years 55 years        
Restricted Stock Units (RSUs) [Member] | Tranche One [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Shares granted in the period | shares       378,000 295,000        
Fair value of grants in period       $ 67.0 $ 46.8        
Share based payment award vesting date       Mar. 15, 2028 Mar. 15, 2027        
Restricted Stock Units (RSUs) [Member] | Tranche Two [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Shares granted in the period | shares         335,000        
Fair value of grants in period         $ 52.6        
Share based payment award vesting date         Feb. 01, 2027        
Unvested Restricted Stock [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Total intrinsic value       $ 387.5 $ 384.6        
Equity awards with an aggregate fair value       60.8 60.8        
Performance Shares [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Restricted stock or unit expense       4.7 3.8        
Total intrinsic value       66.3 66.2        
Equity awards with an aggregate fair value       $ 28.9 $ 21.8        
Performance share awards approved, Fair value $ 10.3   $ 8.6            
Vesting period, years       2 years          
2017 Performance Share Awards [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Provisional awards, terms       The 2023 and 2022 awards are subject to a three-year performance period that began on January 1, 2023 and 2022, respectively, and vest on the three-year anniversary of the date of grant (March 15, 2026 and March 15, 2025).          
Cash Awards [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Shares granted in the period | shares       0          
Cash Awards [Member] | Officer and Key Employees [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Provisional awards, terms       The ultimate award value will be equal to the trailing twelve-month price of our common stock, multiplied by the number of units subject to the award, but limited to between 0.5 and 1.5 times the original value of the units determined as of the grant date.          
Vesting period, years       3 years          
Provisional compensation cash awards approved for future grant by compensation committee, value     $ 19.9         $ 18.8  
Provisional compensation cash award approved for future grant by compensation committee, units | shares     125,000   143,000   208,000 147,000  
Ultimate award value, multiples of original value of the units, minimum | TIME       0.5          
Ultimate award value, multiples of original value of the units, maximum | TIME       1.5          
2023 Provisional Cash Awards [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Cash-based compensation awards, expenses       $ 2.6          
2021 Provisional Cash Awards [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Cash-based compensation awards, expenses       $ 3.3 $ 2.6        
Performance awards expiration date       Jan. 01, 2024          
2020 Provisional Cash Awards [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Provisional compensation cash award approved for future grant by compensation committee, units | shares       191,000          
Cash-based compensation awards, expenses       $ 0.1 $ 3.1        
Cash award with aggregate fair value vested and distributed to participants       $ 24.7          
Performance awards expiration date       Jan. 01, 2023          
2019 Provisional Cash Awards [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Provisional compensation cash award approved for future grant by compensation committee, units | shares         177,000        
Cash award with aggregate fair value vested and distributed to participants         $ 21.1        
2019 Provisional Cash Awards [Member] | Officer and Key Employees [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Provisional compensation cash awards approved for future grant by compensation committee, value                 $ 18.4
Provisional compensation cash award approved for future grant by compensation committee, units | shares                 213,000
Long Term Incentive Plan [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Share-based compensation, shares outstanding, Value       $ 4.0          
Shares granted in the period | shares   3,500,000   2,900,000          
Long Term Incentive Plan [Member] | Performance Shares [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Shares authorized | shares 58,000                
2017 Long Term Incentive Plan [Member] | Minimum [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Period of service from grant date stock options awarded not subject to forfeiture       2 years 2 years        
2017 Long Term Incentive Plan [Member] | Executive Officer [Member] | Minimum [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Minimum age of employee with not subject to award forfeiture on condition compliance       55 years 55 years        
2017 Long Term Incentive Plan [Member] | Performance Shares [Member]                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                  
Shares authorized | shares     54,000