10. Earnings Per Share
The computations of basic and diluted earnings per share were as follows:
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Nine Months Ended | | | September 30, | | September 30, | (Dollars in millions, shares in thousands, except per share data) | | 2022 | | 2021(1) | | 2022 | | 2021(1) | Net income attributable to common shares | | $ | 63 | | | $ | 72 | | | $ | 151 | | | $ | 97 | | | | | | | | | | | Basic weighted-average common shares | | 118,621 | | | 114,629 | | | 116,508 | | | 114,627 | | Dilutive effect of stock-based awards | | 444 | | | 900 | | | 599 | | | 900 | | Diluted weighted-average common shares | | 119,065 | | | 115,529 | | | 117,107 | | | 115,527 | | | | | | | | | | | Basic earnings per share | | $ | 0.53 | | | $ | 0.63 | | | $ | 1.30 | | | $ | 0.84 | | Diluted earnings per share | | $ | 0.53 | | | $ | 0.62 | | | $ | 1.29 | | | $ | 0.84 | | | | | | | | | | | Antidilutive shares excluded from diluted weighted-average common shares | | 2,013 | | | — | | | 1,735 | | | — | |
(1) On August 2, 2021, 114,626,250 shares of common stock of the Company were distributed and began regular-way trading. This share amount is utilized for the calculation of basic and diluted earnings per share for three and nine months ended September 30, 2021.
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