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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Share-Based Compensation Expense | The following table presents share-based compensation expense:
Year |  | Share-Based Compensation Expense |  | Tax Benefit
2021 |  | $ | 63.4 |  |  | $ | 8.0 |
2022 |  | 62.4 |  |  | 7.6 |
2023 |  | 59.4 |  |  | 7.4 |
Schedule of Company Restricted Stock Units Transactions | The following table summarizes transactions in the Company’s restricted stock units:
|  | Restricted Stock Units |  | Weighted Average Grant Date Value
Unvested units–December 31, 2022 |  | 1.1 |  |  | $ | 106.88 |
Units granted |  | 0.3 |  |  | 159.51 |
Units vested |  | (0.5) |  |  | 85.07 |
Units forfeited |  | (0.0 | ) |  | 132.81 |
Performance condition changes |  | 0.0 |  |  | 129.15 |
Unvested units–December 31, 2023 |  | 0.9 |  |  | $ | 138.51 |
Schedule of Company Stock Option Transactions | The following table summarizes transactions in the Company’s stock options:
|  | Stock Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years)
Unexercised options outstanding–December 31, 2022 |  | 3.2 |  |  | $ | 76.81 |  |  |
Options granted |  | — |  |  | — |  |  |
Options exercised |  | (0.0 | ) |  | 127.77 |  |  |
Options forfeited |  | — |  |  | — |  |  |
Options expired |  | — |  |  | — |  |  |
Performance condition changes |  | — |  |  | — |  |  |
Unexercised options outstanding–December 31, 2023 |  | 3.2 |  |  | $ | 76.74 |  |  | 2.7
Exercisable at December 31, 2023 |  | 0.0 |  |  | $ | 119.54 |  |  | 2.8
Schedule of Assumptions Used to Determine Fair Value of Options Granted | The weighted average grant date assumptions used to estimate the fair value of stock options granted were as follows:
|  | For the Years Ended December 31,
|  | 2021 |  | 2022 |  |
Dividend yield |  | 0.0 | % |  | 0.0 | % |  |
Expected volatility(1) |  | 37.1 | % |  | 36.8 | % |  |
Risk-free interest rate(2) |  | 1.0 | % |  | 1.7 | % |  |
Expected life of stock options (in years)(3) |  | 5.7 |  | 5.7 |  |
Forfeiture rate |  | 0.0 | % |  | 0.0 | % |  |
___________________________ (1)Expected volatility is based on historical and implied volatility. (2)Risk-free interest rate is based on the U.S. Treasury yield curve in effect at the date of grant. (3)Expected life of options (in years) is based on the Company’s historical and expected exercise behavior.

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