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Earnings Per Share | 9 Months Ended
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Sep. 30, 2024
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Computation of Earnings Per Share
| Third Quarter |  | Nine Months
| 2024 |  | 2023 |  | 2024 |  | 2023
| (in millions, except per share amounts)
Basic Earnings Per Share (EPS): |  |  |  |  |  |  |
Net income (loss) attributable to AGL | $ | 171 |  |  | $ | 157 |  |  | $ | 358 |  |  | $ | 363 |
Less: Distributed and undistributed income (loss) available to nonvested shareholders | 2 |  |  | 2 |  |  | 3 |  |  | 3 |
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic | $ | 169 |  |  | $ | 155 |  |  | $ | 355 |  |  | $ | 360 |
Basic shares | 52.4 |  |  | 58.5 |  |  | 54.1 |  |  | 58.9 |
Basic EPS | $ | 3.23 |  |  | $ | 2.65 |  |  | $ | 6.57 |  |  | $ | 6.11 |
Diluted EPS: |  |  |  |  |  |  |
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic | $ | 169 |  |  | $ | 155 |  |  | $ | 355 |  |  | $ | 360 |
Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries | — |  |  | — |  |  | — |  |  | — |
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted | $ | 169 |  |  | $ | 155 |  |  | $ | 355 |  |  | $ | 360 |
Basic shares | 52.4 |  |  | 58.5 |  |  | 54.1 |  |  | 58.9 |
Dilutive securities: |  |  |  |  |  |  |
Restricted stock awards | 1.0 |  |  | 1.1 |  |  | 1.1 |  |  | 1.1 |
Diluted shares | 53.4 |  |  | 59.6 |  |  | 55.2 |  |  | 60.0 |
Diluted EPS | $ | 3.17 |  |  | $ | 2.60 |  |  | $ | 6.44 |  |  | $ | 5.99 |
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect | — |  |  | 0.1 |  |  | 0.1 |  |  | 0.1 |

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