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Share-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2024
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,
|  | 2023 |  | 2024
Share-based compensation expense |  | $14.7 |  | $21.1
Tax benefit |  | 1.7 |  | 2.3
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, 2023 |  | 0.9 |  | $138.51
Units granted |  | 0.2 |  | 158.51
Units vested |  | (0.3) |  | 129.42
Units forfeited |  | (0.0) |  | 147.04
Performance condition changes |  | 0.0 |  | 157.42
Unvested units—March 31, 2024 |  | 0.8 |  | 147.14
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, 2023 |  | 3.2 |  | $76.74 |  |
Options granted |  | — |  | — |  |
Options exercised |  | (0.0) |  | 86.65 |  |
Options forfeited |  | — |  | — |  |
Options expired |  | (0.0) |  | 152.36 |  |
Performance condition changes |  | 0.0 |  | 129.17 |  |
Unexercised options outstanding—March 31, 2024 |  | 3.2 |  | 76.77 |  | 2.5
Exercisable at March 31, 2024 |  | 0.0 |  | 123.38 |  | 2.7

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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