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Financial Condition and Net Income on a Statutory Basis - Significant Subsidiaries (Statutory Accounting Practices Disclosure) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
RGA Reinsurance [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | $ 2,262 | $ 2,368 |
Statutory Accounting Practices, Statutory Net Income Amount | (332) | (98) | $ (133)
RGA Canada [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 938 | 903 |
Statutory Accounting Practices, Statutory Net Income Amount | 108 | 25 | 152
RGA Barbados [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 1,074 | 1,781 |
Statutory Accounting Practices, Statutory Net Income Amount | (353) | 52 | 268
RGA Australia [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 387 | 485 |
Statutory Accounting Practices, Statutory Net Income Amount | (68) | (22) | 42
RGA Atlantic [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 759 | 1,137 |
Statutory Accounting Practices, Statutory Net Income Amount | 36 | (226) | 175
RGA International Reinsurance Company dac [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 214 | 1,121 |
Statutory Accounting Practices, Statutory Net Income Amount | 31 | 43 | 52
RGA Americas [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 1,607 | 6,812 |
Statutory Accounting Practices, Statutory Net Income Amount | (441) | (241) | 879
Other Reinsurance Subsidiaries [Member] |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 1,038 | 1,015 |
Statutory Accounting Practices, Statutory Net Income Amount | 300 | (152) | 194
RGA Worldwide Reinsurance Company |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 639 | 702 |
Statutory Accounting Practices, Statutory Net Income Amount | 8 | 10 | 104
RGA Global Reinsurance Company |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 382 | 565 |
Statutory Accounting Practices, Statutory Net Income Amount | 0 | 93 | 59
RGA Life and Annuity Insurance Company |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 2,516 | 2,362 |
Statutory Accounting Practices, Statutory Net Income Amount | $ 5 | $ (13) | $ 4

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- Definition The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529 + Details
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