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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2024
Earnings Per Share [Abstract] |
Schedule of Reconciliation of Basic to Diluted Net Income Per Share | The following table reconciles the shares used in the calculation of basic net income per share to those used for diluted net income per share:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
($ in millions) | 2024 |  | 2023 |  | 2024 |  | 2023
Net income | $ | 136.0 |  |  | $ | 161.3 |  |  | $ | 362.6 |  |  | $ | 456.4 |
Weighted average common shares outstanding | 72.8 |  |  | 74.3 |  |  | 73.1 |  |  | 74.4 |
Dilutive effect of equity awards, based on the treasury stock method | 0.6 |  |  | 1.0 |  |  | 0.7 |  |  | 1.1 |
Weighted average shares assuming dilution | 73.4 |  |  | 75.3 |  |  | 73.8 |  |  | 75.5 |
Schedule of Repurchase of Common Stock | The below table summarizes the details of the Company's repurchases of common stock under this program:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Shares repurchased | 170,771 |  |  | 77,329 |  |  | 1,409,786 |  |  | 753,399 |
Total cost of repurchases ($ in millions) | $ | 52.4 |  |  | $ | 27.8 |  |  | $ | 506.5 |  |  | $ | 261.3 |
Average price per repurchased share | $ | 306.34 |  |  | $ | 360.25 |  |  | $ | 359.24 |  |  | $ | 346.86 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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- Definition Schedule Of Common Stock Repurchases + References No definition available. + Details
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