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Share-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-Based Compensation
The following table presents share-based compensation expense:
For the Three Months Ended March 31,
20222023
Share-based compensation expense$14.7 $14.7 
Tax benefit1.7 1.7 
Schedule of Company Restricted Stock Units Transactions
The following table summarizes transactions in the Company’s restricted stock units:
Restricted Stock UnitsWeighted Average Grant Date Value
Unvested units— December 31, 20221.1 $106.88 
Units granted0.3 160.91 
Units vested(0.4)87.00 
Units forfeited(0.0 )125.94 
Performance condition changes0.0 73.81 
Unvested units— March 31, 20231.0 131.44 
Schedule of Company Stock Option Transactions
The following table summarizes transactions in the Company’s stock options:
Stock OptionsWeighted Average Exercise PriceWeighted Average Remaining Contractual Life (Years)
Unexercised options outstanding— December 31, 20223.2 $76.81  
Options granted— — 
Options exercised(0.0 )122.40 
Options forfeited— —  
Options expired— — 
Performance condition changes— — 
Unexercised options outstanding— March 31, 20233.2 76.77 3.5
Exercisable at March 31, 20230.0 116.62 3.1
Schedule of Fair Value of Options Granted and Assumptions The weighted average grant date assumptions used to estimate the fair value of stock options granted were as follows:
For the Three Months Ended March 31, 2022
Dividend yield0.0 %
Expected volatility36.8 %
Risk-free interest rate1.7 %
Expected life of options (in years)5.7
Forfeiture rate— %