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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended 72 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost related to unvested share-based equity awards $ 52.4     $ 52.4
Weighted average period of recognition of unvested share-based equity awards (in years) 1 year 2 months 12 days      
Unrecognized compensation cost related to unvested share-based equity awards, Stock Options $ 5.1     5.1
Unrecognized compensation cost related to unvested share-based equity awards, Restricted Stock $ 47.3     47.3
Weighted average remaining contractual life of option outstanding 5 years 2 months 12 days      
Weighted average remaining contractual life of option exercisable 4 years 4 months 24 days      
Estimated weighted average fair value of options granted $ 37.41 $ 36.77 $ 21.76  
Total intrinsic value of options exercised $ 9.9      
Total intrinsic value of options outstanding 35.7     35.7
Total intrinsic value of options exercisable $ 33.6     $ 33.6
Weighted average fair values at the grant dates of grants awarded $ 146.08 $ 165.54 $ 98.09  
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 0.00%      
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 200.00%      
Omnibus Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares of common stock available for issuance 27,775,000     27,775,000
Omnibus Incentive Plan | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option awards granted, vesting period 1 year      
Omnibus Incentive Plan | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option awards granted, vesting period 4 years      
Omnibus Incentive Plan | Deferred Stock Units | Non-employee directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock shares granted 17,000 10,000 20,000  
Additional shares issued to retired directors 11,000 8,000 13,000 67,000
Omnibus Incentive Plan | Deferred Stock Units | Non-employee directors | Since 2007        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock shares granted 243,000      
Stock Option Plans        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock shares granted 346,535      
Directors Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum shares authorized for issuance 500,000     500,000
Shares of common stock earned 73,000      
Additional shares issued to retired directors 427,000      
Liabilities under share plan $ 9.2 $ 8.8   $ 9.2
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted 66,184      
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted 347,083      
Total intrinsic value of restricted stock expected to vest $ 91.3     $ 91.3
Weighted average fair values at the grant dates of grants awarded $ 119.42 $ 122.08 $ 92.23