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Investments - Narrative (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) swap security | Dec. 31, 2021 USD ($)
Schedule of Investments [Line Items] |  |
Unfunded commitments to limited partnerships | $ 354 | $ 366
Percentage (based on amount of unrealized loss) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade | 94.00% |
Percentage (based on fair value) of available for sale fixed maturities that are in an unrealized loss position and rated investment grade | 95.00% |
Interest rate swaps | Cash flow hedging | Designated as hedging instrument |  |
Schedule of Investments [Line Items] |  |
Number of interest rate swaps designated and qualifying as a cash flow hedges | swap | 5 |
Derivative, notional amount | $ 408 |
Derivative fair value | (5) |
Gain (loss) reclassified from AOCI into net investment income | 1 |
Receivable for collateral posted related to swaps | $ 15 |
Multifamily |  |
Schedule of Investments [Line Items] |  |
Percent of real-estate related investments by property type | 88.00% | 88.00%
Single Family |  |
Schedule of Investments [Line Items] |  |
Percent of real-estate related investments by property type | 1.00% | 1.00%
Other Property |  |
Schedule of Investments [Line Items] |  |
Percent of real-estate related investments by property type | 11.00% | 11.00%
Fixed maturities |  |
Schedule of Investments [Line Items] |  |
Gross unrealized losses on fixed maturities | $ 220 | $ 28
Number of available for sale securities in an unrealized loss position | security | 1,128,000,000 |

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