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Expected Loss to be Paid (Recovered) - Net Expected Loss to be Paid (Recovered) and Net Economic Loss Development (Benefit) by Accounting Model (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021 | Dec. 31, 2020
Schedule of Expected Losses to be Paid [Line Items] |  |  |  |  |  |  |  |
Net Expected Loss to be Paid (Recovered) | $ 442 | $ 466 | $ 442 | $ 466 | $ 432 | $ 411 | $ 472 | $ 529
Net economic loss development (benefit) | (32) | (20) | (76) | (7) |  |  |  |
Accretion of discount | 3 | 2 | 5 | 3 |  |  |  |
Changes in discount rates | (42) | 15 | (89) | (33) |  |  |  |
Changes in timing and assumptions | 7 | (37) | 8 | 23 |  |  |  |
Net (paid) recovered losses | 42 | 14 | 107 | (56) |  |  |  |
Insurance |  |  |  |  |  |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |  |  |  |  |  |
Net Expected Loss to be Paid (Recovered) | 405 |  | 405 |  |  | 364 |  |
Net economic loss development (benefit) | (26) | (25) | (70) | (9) |  |  |  |
FG VIEs' assets |  |  |  |  |  |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |  |  |  |  |  |
Net Expected Loss to be Paid (Recovered) | 32 |  | 32 |  |  | 42 |  |
Net economic loss development (benefit) | (6) | (1) | (10) | (7) |  |  |  |
Credit derivatives |  |  |  |  |  |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |  |  |  |  |  |
Net Expected Loss to be Paid (Recovered) | 5 |  | 5 |  |  | $ 5 |  |
Net economic loss development (benefit) | $ 0 | $ 6 | $ 4 | $ 9 |  |  |  |

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