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Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings per Share |
| Three Months Ended |  |
| March 31, |  |
(in millions, except per share data) | 2023 |  | 2022 |  |  |  |
Net income attributable to common shareholders | $ | 105.7 |  |  | $ | 105.0 |  |  |  |  |
Average basic shares outstanding | 56.5 |  |  | 57.1 |  |  |  |  |
Effect of dilutive share-based awards | 0.8 |  |  | 0.8 |  |  |  |  |
Average diluted shares outstanding | 57.3 |  |  | 57.9 |  |  |  |  |
Earnings per basic share | $ | 1.87 |  |  | $ | 1.84 |  |  |  |  |
Earnings per diluted share | $ | 1.84 |  |  | $ | 1.81 |  |  |  |  |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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