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Shareholders' Equity - Changes in AOCI by Component (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Changes in Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 5,064 |
Other comprehensive income (loss) before reclassifications | $ (120) | $ (294) | (74) | $ (993)
Less: Amounts reclassified from AOCI to: |  |  |  |
Net realized investment gains (losses) | (9) | (14) | (20) | (39)
Interest expense | 24 | 20 | 67 | 60
Income (loss) before income taxes | 202 | (22) | 466 | 49
Tax (provision) benefit | (43) | 27 | (84) | 6
Other comprehensive income (loss) | (107) | (282) | (50) | (952)
Ending balance | 5,252 |  | 5,252 |
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Net realized investment gains (losses) | (9) | (14) | (20) | (48)
Fair value gains (losses) on FG VIEs |  |  |  | (2)
Interest expense |  |  | 1 |
Income (loss) before income taxes | (15) | (14) | (27) | (50)
Tax (provision) benefit | 2 | 2 | 3 | 9
Total amount reclassified from AOCI, net of tax | (13) | (12) | (24) | (41)
Reclassification out of Accumulated Other Comprehensive Income | Financial Guaranty Variable Interest Entities |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs |  |  | (2) |
Reclassification out of Accumulated Other Comprehensive Income | Consolidated Investment Vehicles |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs | (6) |  | (6) |
Total AOCI |  |  |  |
Changes in Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning balance | (458) | (370) | (515) | 300
Less: Amounts reclassified from AOCI to: |  |  |  |
Ending balance | (565) | (652) | (565) | (652)
No Credit Impairment |  |  |  |
Changes in Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning balance | (284) | (205) | (343) | 375
Other comprehensive income (loss) before reclassifications | (115) | (286) | (54) | (886)
Less: Amounts reclassified from AOCI to: |  |  |  |
Other comprehensive income (loss) | (113) | (277) | (54) | (857)
Ending balance | (397) | (482) | (397) | (482)
No Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Net realized investment gains (losses) | (2) | (11) | 2 | (35)
Fair value gains (losses) on FG VIEs |  |  |  | 0
Interest expense |  |  | 0 |
Income (loss) before income taxes | (2) | (11) | 2 | (35)
Tax (provision) benefit | 0 | 2 | (2) | 6
Total amount reclassified from AOCI, net of tax | (2) | (9) | 0 | (29)
No Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income | Financial Guaranty Variable Interest Entities |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs |  |  | 0 |
No Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income | Consolidated Investment Vehicles |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs | 0 |  | 0 |
Credit Impairment |  |  |  |
Changes in Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning balance | (115) | (107) | (110) | (24)
Other comprehensive income (loss) before reclassifications | (14) | (1) | (31) | (92)
Less: Amounts reclassified from AOCI to: |  |  |  |
Other comprehensive income (loss) | (8) | 2 | (13) | (81)
Ending balance | (123) | (105) | (123) | (105)
Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Net realized investment gains (losses) | (7) | (3) | (22) | (13)
Fair value gains (losses) on FG VIEs |  |  |  | 0
Interest expense |  |  | 0 |
Income (loss) before income taxes | (7) | (3) | (22) | (13)
Tax (provision) benefit | 1 | 0 | 4 | 2
Total amount reclassified from AOCI, net of tax | (6) | (3) | (18) | (11)
Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income | Financial Guaranty Variable Interest Entities |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs |  |  | 0 |
Credit Impairment | Reclassification out of Accumulated Other Comprehensive Income | Consolidated Investment Vehicles |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs | 0 |  | 0 |
ISCR on FG VIEs’ Liabilities with Recourse |  |  |  |
Changes in Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning balance | (22) | (19) | (23) | (21)
Other comprehensive income (loss) before reclassifications | 10 | (3) | 9 | (2)
Less: Amounts reclassified from AOCI to: |  |  |  |
Other comprehensive income (loss) | 10 | (3) | 11 | (1)
Ending balance | (12) | (22) | (12) | (22)
ISCR on FG VIEs’ Liabilities with Recourse | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Net realized investment gains (losses) | 0 | 0 | 0 | 0
Fair value gains (losses) on FG VIEs |  |  |  | (2)
Interest expense |  |  | 0 |
Income (loss) before income taxes | 0 | 0 | (2) | (2)
Tax (provision) benefit | 0 | 0 | 0 | 1
Total amount reclassified from AOCI, net of tax | 0 | 0 | (2) | (1)
ISCR on FG VIEs’ Liabilities with Recourse | Reclassification out of Accumulated Other Comprehensive Income | Financial Guaranty Variable Interest Entities |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs |  |  | (2) |
ISCR on FG VIEs’ Liabilities with Recourse | Reclassification out of Accumulated Other Comprehensive Income | Consolidated Investment Vehicles |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs | 0 |  | 0 |
Cumulative Translation Adjustment |  |  |  |
Changes in Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning balance | (42) | (45) | (45) | (36)
Other comprehensive income (loss) before reclassifications | (1) | (4) | 2 | (13)
Less: Amounts reclassified from AOCI to: |  |  |  |
Other comprehensive income (loss) | 4 | (4) | 7 | (13)
Ending balance | (38) | (49) | (38) | (49)
Cumulative Translation Adjustment | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Net realized investment gains (losses) | 0 | 0 | 0 | 0
Fair value gains (losses) on FG VIEs |  |  |  | 0
Interest expense |  |  | 0 |
Income (loss) before income taxes | (6) | 0 | (6) | 0
Tax (provision) benefit | 1 | 0 | 1 | 0
Total amount reclassified from AOCI, net of tax | (5) | 0 | (5) | 0
Cumulative Translation Adjustment | Reclassification out of Accumulated Other Comprehensive Income | Financial Guaranty Variable Interest Entities |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs |  |  | 0 |
Cumulative Translation Adjustment | Reclassification out of Accumulated Other Comprehensive Income | Consolidated Investment Vehicles |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs | (6) |  | (6) |
Cash Flow Hedge |  |  |  |
Changes in Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |
Beginning balance | 5 | 6 | 6 | 6
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0 | 0
Less: Amounts reclassified from AOCI to: |  |  |  |
Other comprehensive income (loss) | 0 | 0 | (1) | 0
Ending balance | 5 | 6 | 5 | 6
Cash Flow Hedge | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Net realized investment gains (losses) | 0 | 0 | 0 | 0
Fair value gains (losses) on FG VIEs |  |  |  | 0
Interest expense |  |  | 1 |
Income (loss) before income taxes | 0 | 0 | 1 | 0
Tax (provision) benefit | 0 | 0 | 0 | 0
Total amount reclassified from AOCI, net of tax | 0 | $ 0 | 1 | $ 0
Cash Flow Hedge | Reclassification out of Accumulated Other Comprehensive Income | Financial Guaranty Variable Interest Entities |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs |  |  | 0 |
Cash Flow Hedge | Reclassification out of Accumulated Other Comprehensive Income | Consolidated Investment Vehicles |  |  |  |
Less: Amounts reclassified from AOCI to: |  |  |  |
Fair value gains (losses) on FG VIEs | $ 0 |  | $ 0 |

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