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Earnings Per Share | 3 Months Ended
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Mar. 31, 2022
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Computation of Earnings Per Share
| First Quarter
| 2022 |  | 2021
| (in millions, except per share amounts)
Basic Earnings Per Share (EPS): |  |  |
Net income (loss) attributable to AGL | $ | 66 |  |  | $ | 11 |
Less: Distributed and undistributed income (loss) available to nonvested shareholders | — |  |  | — |
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic | $ | 66 |  |  | $ | 11 |
Basic shares | 66.3 |  |  | 76.7 |
Basic EPS | $ | 1.00 |  |  | $ | 0.14 |
Diluted EPS: |  |  |
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic | $ | 66 |  |  | $ | 11 |
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 | $ | 66 |  |  | $ | 11 |
Basic shares | 66.3 |  |  | 76.7 |
Dilutive securities: |  |  |
Options and restricted stock awards | 1.1 |  |  | 0.8 |
Diluted shares | 67.4 |  |  | 77.5 |
Diluted EPS | $ | 0.98 |  |  | $ | 0.14 |
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect | 0.2 |  |  | 0.3 |

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