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Earnings Per Share | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Computation of Earnings Per Share
| First Quarter
| 2023 |  | 2022
| (in millions, except per share amounts)
Basic Earnings Per Share (EPS): |  |  |
Net income (loss) attributable to AGL | $ | 81 |  |  | $ | 66 |
Less: Distributed and undistributed income (loss) available to nonvested shareholders | — |  |  | — |
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic | $ | 81 |  |  | $ | 66 |
Basic shares | 59.1 |  |  | 66.3 |
Basic EPS | $ | 1.37 |  |  | $ | 1.00 |
Diluted EPS: |  |  |
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic | $ | 81 |  |  | $ | 66 |
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 | $ | 81 |  |  | $ | 66 |
Basic shares | 59.1 |  |  | 66.3 |
Dilutive securities: |  |  |
Restricted stock awards | 1.3 |  |  | 1.1 |
Diluted shares | 60.4 |  |  | 67.4 |
Diluted EPS | $ | 1.34 |  |  | $ | 0.98 |
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect | 0.1 |  |  | 0.2 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI https://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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