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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2022
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted earnings per share on net income (in millions, except per share information):
|  | Three months ended September 30, |  | Nine months ended September 30,
|  | 2022 |  | 2021 |  | 2022 |  | 2021
Earnings: |  |  |  |  |  |  |  |
Net income |  | $ | 285 |  |  | $ | (22) |  |  | $ | 421 |  |  | $ | 461 |
Less: Net income attributable to noncontrolling interest |  | 1 |  |  | — |  |  | 2 |  |  | — |
Net income available to RGA, Inc. shareholders |  | $ | 284 |  |  | $ | (22) |  |  | $ | 419 |  |  | $ | 461 |
Shares: |  |  |  |  |  |  |  |
Weighted average outstanding shares |  | 67 |  |  | 68 |  |  | 67 |  |  | 68 |
Equivalent shares from outstanding stock awards |  | 1 |  |  | — |  |  | 1 |  |  | — |
Denominator for diluted calculation |  | 68 |  |  | 68 |  |  | 68 |  |  | 68 |
Earnings per share: |  |  |  |  |  |  |  |
Basic |  | $ | 4.24 |  |  | $ | (0.32) |  |  | $ | 6.25 |  |  | $ | 6.78 |
Diluted |  | $ | 4.19 |  |  | $ | (0.32) |  |  | $ | 6.19 |  |  | $ | 6.74 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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