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Variable Interest Entity and Noncontrolling Interests - Other variable interest entity disclosures (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | $ 58,906 |  | $ 47,990 | $ 45,101
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 1,242 |  | 3,595 |
Remaining Coverage, Amount |  | 311 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2017-1 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 |  | 37 |
Remaining Coverage, Amount | [1] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2018-1 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 90 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2018-3 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 |  | 199 |
Remaining Coverage, Amount | [1] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2019-1 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 71 |  | 108 |
Remaining Coverage, Amount | [1] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2019-2 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 325 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2019-3 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 99 |  | 223 |
Remaining Coverage, Amount | [1] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2019-4 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 266 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2020-2 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 105 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2020-3 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 244 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2020-4 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 98 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2021-1 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 467 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2021-2 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 0 | [2] | 458 |
Remaining Coverage, Amount | [1],[2] | 0 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2021-3 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 429 |  | 490 |
Remaining Coverage, Amount | [1] | 112 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2022-1 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 256 |  | 284 |
Remaining Coverage, Amount | [1] | 26 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2022-2 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 201 |  | $ 201 |
Remaining Coverage, Amount | [1] | 126 |  |  |
Variable Interest Entity, Not Primary Beneficiary | Bellemeade 2023-1 Ltd |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total VIE Assets |  | 186 |  |  |
Remaining Coverage, Amount | [1] | $ 47 |  |  |
[1] | Coverage from a separate panel of reinsurers remaining at December 31, 2023
[2] | Agreements terminated in the 2023 fourth quarter

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