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EARNINGS PER SHARE | 3 Months Ended
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Mar. 31, 2025
Earnings Per Share [Abstract] |
EARNINGS PER SHARE |
7. | EARNINGS PER SHARE
Basic earnings per share attributable to common stockholders is calculated by dividing net income attributable to common stockholders by the weighted average number of shares of common stock outstanding during the reporting period. Diluted earnings per share attributable to common stockholders reflects the assumed conversion of all dilutive securities, calculated using the treasury stock method. The tables below illustrate the reconciliation of the earnings and number of shares used in our calculation of basic and diluted earnings per share attributable to common stockholders.
| Three Months Ended |  |
(in millions, except per share amounts) | March 31, 2025 |  | March 31, 2024 |  |  |  |
Net income attributable to common stockholders | $ | 56 |  |  | $ | 47 |  |  |  |  |
Shares for basic earnings per share | 35.1 |  |  | 35.5 |  |  |  |  |
Basic earnings per share | $ | 1.60 |  |  | $ | 1.32 |  |  |  |  |
| Three Months Ended |  |
(in millions, except per share amounts) | March 31, 2025 |  | March 31, 2024 |  |  |  |
Net income attributable to common stockholders | $ | 56 |  |  | $ | 47 |  |  |  |  |
Add back of interest expense related to convertible notes, net of tax | 5 |  |  | 5 |  |  |  |  |
Numerator used to calculate diluted earnings per share | $ | 61 |  |  | $ | 52 |  |  |  |  |
Shares for basic earnings per share | 35.1 |  |  | 35.5 |  |  |  |  |
Effect of dilutive shares outstanding |  |  |  |  |  |  |
Restricted stock units | 0.2 |  |  | 0.1 |  |  |  |  |
2026 Convertible Notes | 3.7 |  |  | 3.6 |  |  |  |  |
2027 Convertible Notes | 3.0 |  |  | 3.0 |  |  |  |  |
Shares for diluted earnings per share | 42.0 |  |  | 42.2 |  |  |  |  |
Diluted earnings per share | $ | 1.46 |  |  | $ | 1.22 |  |  |  |  |
The computations of diluted earnings per share attributable to common stockholders above exclude approximately 529,000 and 396,000 shares of common stock, the maximum number of shares issuable as of March 31, 2025 and March 31, 2024, respectively, upon the vesting of certain performance-based awards, because the performance conditions required to be met for the shares subject to such awards to vest were not achieved by the end of the reporting period. In accordance with the applicable accounting guidance for calculating earnings per share, for the first quarter of 2025, we excluded from our calculation of diluted earnings per share 788,607 shares underlying stock appreciation rights (“SARs”) that may settle in shares of common stock because the exercise prices of such SARs, which ranged from $71.17 to $173.88, were greater than the average market price of our common stock for the applicable period. For the first quarter of 2024, we excluded from our calculation of diluted earnings per share 645,524 shares underlying SARs that may settle in shares of common stock because the exercise prices of such SARs, which ranged from $93.73 to $173.88, were greater than the average market price of our common stock for the applicable period.

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