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Net Income Per Common Share Computations | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Net Income Per Common Share Computations | 20. NET INCOME PER COMMON SHARE COMPUTATION The following is a reconciliation of the numerator and denominator of the net income per common share computations:
| Years Ended December 31,
(in millions, except per share data) | 2023 |  | 2022 |  | 2021
Numerator for basic net income per common share: |  |  |  |  |
Net income | $ | 417.3 |  |  | $ | 439.4 |  |  | $ | 249.1 |
Denominator for net income per common share: |  |  |  |  |
Basic | 75.2 |  |  | 75.9 |  |  | 77.2 |
Plus dilutive effect of stock awards | 0.9 |  |  | 1.1 |  |  | 1.2 |
Diluted | 76.1 |  |  | 77.0 |  |  | 78.4 |
Net income per common share data: |  |  |  |  |
Basic net income | $ | 5.55 |  |  | $ | 5.79 |  |  | $ | 3.22 |
Diluted net income | $ | 5.49 |  |  | $ | 5.71 |  |  | $ | 3.18 |
All share and per-share amounts have been retroactively adjusted to reflect the effects of the Stock Split. Refer to Note 10, Shareholders' Equity for further information on the Stock Split.

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