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Derivatives - Narrative (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) swap | Jun. 30, 2020 USD ($) swap | Mar. 31, 2020 USD ($) swap | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) swap | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Carrying value of collateral received to support purchased call options | $ 342,000,000 |  |  |  | $ 342,000,000 |  | $ 577,000,000
Not designated as hedging instrument | Fixed-Indexed Annuities (Embedded Derivative) | Annuity benefits |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Total realized/unrealized gains (losses) related to unlocking of actuarial assumptions | $ 240,000,000 |  |  | $ 181,000,000 | $ 240,000,000 | $ 181,000,000 |
Cash Flow Hedges | Designated as Hedging Instrument | Interest rate swaps |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Number of interest rate swaps designated and qualifying as a cash flow hedges | swap | 9 |  |  |  | 9 |  |
Derivative, notional amount | $ 1,650,000,000 |  |  |  | $ 1,650,000,000 |  | 1,980,000,000
Gain (loss) reclassified from AOCI into net investment income | 8,000,000 |  |  |  | 31,000,000 | $ (1,000,000) |
Collateral payable related to interest rate swaps | 7,000,000 |  |  |  | 7,000,000 |  |
Collateral receivable related to interest rate swaps |  |  |  |  |  |  | 20,000,000
Cash Flow Hedges | Designated as Hedging Instrument | Interest rate swaps | Maximum |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Gain (loss) reclassified from AOCI into net investment income |  |  |  | $ (1,000,000) |  |  |
Other assets | Cash Flow Hedges | Designated as Hedging Instrument | Interest rate swaps |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Net derivatives, at fair value | 114,000,000 |  |  |  | 114,000,000 |  | 50,000,000
Other liabilities | Cash Flow Hedges | Designated as Hedging Instrument | Interest rate swaps |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Net derivatives, at fair value | $ 0 |  |  |  | $ 0 |  | $ (5,000,000)
Contract termination | Cash Flow Hedges | Interest rate swaps |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, notional amount |  | $ 166,000,000 | $ 83,000,000 |  |  |  |
Number of interest rate derivatives terminated | swap |  | 2 | 1 |  |  |  |
Facility closing | Cash Flow Hedges | Interest rate swaps |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Derivative, notional amount |  | $ 44,000,000 |  |  |  |  |
Number of interest rate derivatives terminated | swap |  | 1 |  |  |  |  |

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