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Investments - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Investments [Line Items] |  |
Short-term investments | $ 6,017 | $ 6,807
Accrued investment income | 347 | 371
Agent loans, net |  |
Investments [Line Items] |  |
Accrued investment income | $ 2 |
High credit quality, percentage | 85.00% |
Allowance | $ (6) |
Fixed income securities |  |
Investments [Line Items] |  |
Accrued investment income | 322 | 351
Mortgage loans |  |
Investments [Line Items] |  |
Accrued investment income | 4 | 2
Bank loans, net |  |
Investments [Line Items] |  |
Accrued investment income | $ 3 | $ 3

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