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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Calculation of earnings per share | The following table sets forth the calculation of EPS on total net income for the years ended December 31, 2023, 2022 and 2021 (in millions, except share and per share data):
|  | Years Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Weighted average basic common shares outstanding |  | 13,681,660 |  |  | 15,441,292 |  |  | 17,655,365 |
Dilutive effect of stock-based awards and employee stock purchases |  | 53,139 |  |  | 52,324 |  |  | 66,847 |
Weighted average dilutive common shares outstanding |  | 13,734,799 |  |  | 15,493,616 |  |  | 17,722,212 |
Basic: |  |  |  |  |  |
Net income |  | $ | 601.6 |  |  | $ | 751.5 |  |  | $ | 552.1 |
Less: Earnings allocated to participating securities from continuing operations |  | 14.8 |  |  | 21.3 |  |  | 21.1 |
Less: Loss allocated to participating securities from discontinued operations |  | — |  |  | (0.1) |  |  | (2.5) |
Net income available to basic common shares |  | $ | 586.8 |  |  | $ | 730.3 |  |  | $ | 533.5 |
Basic earnings per common share |  | $ | 42.89 |  |  | $ | 47.29 |  |  | $ | 30.22 |
Diluted: |  |  |  |  |  |
Net income |  | $ | 601.6 |  |  | $ | 751.5 |  |  | $ | 552.1 |
Less: Earnings allocated to participating securities from continuing operations |  | 14.8 |  |  | 21.3 |  |  | 21.0 |
Less: Loss allocated to participating securities from discontinued operations |  | — |  |  | (0.1) |  |  | (2.5) |
Net income available to diluted common shares |  | $ | 586.9 |  |  | $ | 730.3 |  |  | $ | 533.6 |
Diluted earnings per common share |  | $ | 42.73 |  |  | $ | 47.14 |  |  | $ | 30.11 |

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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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