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Share-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2024
Share-Based Payment Arrangement [Abstract] |
Schedule of Share-Based Compensation | The following table presents share-based compensation expense:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2023 |  | 2024 |  | 2023 |  | 2024
Share-based compensation expense | $14.5 |  | $10.2 |  | $43.9 |  | $42.1
Tax benefit | 1.9 |  | 1.2 |  | 5.5 |  | 5.2
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 |  | 159.32
Units vested | (0.3) |  | 129.72
Units forfeited | (0.0) |  | 149.00
Performance condition changes | 0.0 |  | 154.72
Unvested units—September 30, 2024 | 0.8 |  | 147.40
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 | (1.3) |  | 74.82 |  |
Options forfeited | (0.0) |  | 185.98 |  |
Options expired | (0.0) |  | 152.36 |  |
Performance condition changes | 0.0 |  | 129.17 |  |
Unexercised options outstanding—September 30, 2024 | 1.9 |  | 78.02 |  | 2.1
Exercisable at September 30, 2024 | 1.5 |  | 75.89 |  | 1.9

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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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -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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