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Investments - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) security | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Schedule of Investments [Line Items] |  |  |  |  |
Unfunded commitments to limited partnerships | $ 275 |  | $ 275 |  | $ 290
Investments accounted for using the equity method | 1,378 |  | $ 1,378 |  | $ 1,235
Percentage (based on amount of unrealized loss) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade |  |  | 69.00% |  |
Percentage (based on fair value) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade |  |  | 91.00% |  |
Net investment income | $ 164 | $ 88 | $ 352 | $ 192 |
Multifamily |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percent of real-estate related investments by property type | 88.00% |  | 88.00% |  | 87.00%
Single Family |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percent of real-estate related investments by property type | 2.00% |  | 2.00% |  | 2.00%
Other Property |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Percent of real-estate related investments by property type | 10.00% |  | 10.00% |  | 11.00%
Annuity subsidiaries | Assets of discontinued annuity operations |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Investments accounted for using the equity method |  |  |  |  | $ 646
Neon Capital Limited |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Net investment income |  | 0 |  | (6) |
Neon Capital Limited | Maximum |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Net investment income |  | $ 1 |  |  |
Neon Capital Limited | Investment income |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Loss on sale of equity securities |  |  |  | $ (7) |
Fixed maturities |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Gross unrealized losses on fixed maturities | $ 12 |  | $ 12 |  | 21
Number of available for sale securities in an unrealized loss position | security |  |  | 366 |  |
Fixed maturities | Annuity subsidiaries | Assets of discontinued annuity operations |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Gross unrealized losses on fixed maturities |  |  |  |  | $ 97

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