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Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Net Derivatives (2) |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |
Balance, beginning of period | $ 35 | $ 36
Total realized/unrealized gains (losses) included in net income (loss) (3) (4) | 0 | (10)
Total realized/unrealized gains (losses) included in AOCI | (1) | 4
Purchases (5) | 0 | 0
Sales (5) | 0 | 0
Issuances (5) | 0 | 0
Settlements (5) | 0 | 0
Transfers into Level 3 (6) | 0 | 0
Transfers out of Level 3 (6) | (1) | 0
Balance, end of period | 33 | 30
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | (10)
Changes in unrealized gains (losses) included in OCI | (1) | 4
Embedded Derivatives on Index-Linked Annuities |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |
Balance, beginning of period | (3,932) | (6,641)
Total realized/unrealized gains (losses) included in net income (loss) (3) (4) | (1,090) | 763
Total realized/unrealized gains (losses) included in AOCI | 0 | 0
Purchases (5) | 0 | 0
Sales (5) | 0 | 0
Issuances (5) | 0 | 0
Settlements (5) | (142) | 204
Transfers into Level 3 (6) | 0 | 0
Transfers out of Level 3 (6) | 0 | 0
Balance, end of period | (5,164) | (5,674)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (1,166) | 687
Changes in unrealized gains (losses) included in OCI | 0 | 0
Corporate (1) |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 1,787 | 1,399
Total realized/unrealized gains (losses) included in net income (loss) (3) (4) | 1 | 0
Total realized/unrealized gains (losses) included in AOCI | 24 | (99)
Purchases (5) | 142 | 422
Sales (5) | (13) | (93)
Issuances (5) | 0 | 0
Settlements (5) | 0 | 0
Transfers into Level 3 (6) | 19 | 86
Transfers out of Level 3 (6) | (24) | (97)
Balance, end of period | 1,936 | 1,618
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 1 | 0
Changes in unrealized gains (losses) included in OCI for the instrument still held at end of period | 23 | (98)
Structured Securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 365 | 220
Total realized/unrealized gains (losses) included in net income (loss) (3) (4) | (1) | 0
Total realized/unrealized gains (losses) included in AOCI | 1 | (5)
Purchases (5) | 19 | 87
Sales (5) | (4) | (2)
Issuances (5) | 0 | 0
Settlements (5) | 0 | 0
Transfers into Level 3 (6) | 1 | 1
Transfers out of Level 3 (6) | (31) | (107)
Balance, end of period | 350 | 194
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (1) | 0
Changes in unrealized gains (losses) included in OCI for the instrument still held at end of period | 1 | (5)
Foreign Government |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 38 | 26
Total realized/unrealized gains (losses) included in net income (loss) (3) (4) | 0 | 0
Total realized/unrealized gains (losses) included in AOCI | 1 | (3)
Purchases (5) | 0 | 0
Sales (5) | 0 | 0
Issuances (5) | 0 | 0
Settlements (5) | 0 | 0
Transfers into Level 3 (6) | 0 | 0
Transfers out of Level 3 (6) | 0 | 0
Balance, end of period | 39 | 23
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0
Changes in unrealized gains (losses) included in OCI for the instrument still held at end of period | 1 | (3)
Equity Securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 27 | 13
Total realized/unrealized gains (losses) included in net income (loss) (3) (4) | (2) | 0
Total realized/unrealized gains (losses) included in AOCI | 0 | 0
Purchases (5) | 0 | 0
Sales (5) | 0 | 0
Issuances (5) | 0 | 0
Settlements (5) | 0 | 0
Transfers into Level 3 (6) | 0 | 0
Transfers out of Level 3 (6) | 0 | 0
Balance, end of period | 25 | 13
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | (2) | 0
Changes in unrealized gains (losses) included in OCI for the instrument still held at end of period | 0 | 0
Short-term Investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance, beginning of period | 0 | 2
Total realized/unrealized gains (losses) included in net income (loss) (3) (4) | 0 | 0
Total realized/unrealized gains (losses) included in AOCI | 0 | 0
Purchases (5) | 0 | 0
Sales (5) | 0 | (2)
Issuances (5) | 0 | 0
Settlements (5) | 0 | 0
Transfers into Level 3 (6) | 0 | 0
Transfers out of Level 3 (6) | 0 | 0
Balance, end of period | 0 | 0
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period | 0 | 0
Changes in unrealized gains (losses) included in OCI for the instrument still held at end of period | $ 0 | $ 0

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