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Related Parties - Summary of Investments (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Related Party Transaction [Line Items] |  |
Investment funds | $ 15,868 | $ 14,128
Related Party |  |
Related Party Transaction [Line Items] |  |
Investment funds | 1,636 | 1,569
Related Party | Athora |  |
Related Party Transaction [Line Items] |  |
Investment funds | 1,061 | 959
Equity Securities, FV-NI | 247 | 273
Investments | $ 1,308 | $ 1,232

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