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Fair Value of Assets and Liabilities - Change in level 3 assets and liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair value assets measured on recurring basis, change in unrealized gain (loss) included in earnings | $ (2) | $ 6 | $ 36
Gains (losses) for Level 3 liabilities still held at the balance sheet date, included in earnings | (43) | (61) | 58
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date, included in earnings | (45) | (55) | 94
Changes in unrealized net capital gains and losses reported in OCI | (9) |  |
Net investment income |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Gains (losses) for Level 3 assets still held at the balance sheet date | (24) | (2) | 0
Realized capital gains (losses) |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Gains (losses) for Level 3 assets still held at the balance sheet date | 22 | 8 | 36
Life contract benefits |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Gains (losses) for Level 3 assets still held at the balance sheet date | (1) | 7 | (5)
Interest credited to contractholder funds |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Gains (losses) for Level 3 assets still held at the balance sheet date | (42) | (68) | 63
Contractholder funds: Derivatives embedded in life and annuity contracts |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Gains (losses) for Level 3 liabilities still held at the balance sheet date, included in earnings | (43) | (61) | 58
Municipal |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair value assets measured on recurring basis, change in unrealized gain (loss) included in earnings | 1 | 1 | 0
Changes in unrealized net capital gains and losses reported in OCI | 2 |  |
Fixed income securities |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair value assets measured on recurring basis, change in unrealized gain (loss) included in earnings | 1 | 1 | 0
Equity securities |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair value assets measured on recurring basis, change in unrealized gain (loss) included in earnings | (3) | 6 | 36
Free-standing derivatives, net |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair value assets measured on recurring basis, change in unrealized gain (loss) included in earnings | 0 | (1) | 0
Corporate - public |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair value assets measured on recurring basis, change in unrealized gain (loss) included in earnings | (2) | 0 | 0
Changes in unrealized net capital gains and losses reported in OCI | 1 |  |
Corporate - privately placed |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Fair value assets measured on recurring basis, change in unrealized gain (loss) included in earnings | 2 | $ 0 | $ 0
Changes in unrealized net capital gains and losses reported in OCI | (11) |  |
ABS |  |  |
Gains (losses) included in net income for Level 3 assets and liabilities: |  |  |
Changes in unrealized net capital gains and losses reported in OCI | $ (1) |  |

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