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Policyholder Account Balances - Summary of Range Guaranteed Minimum Crediting Rate (Detail) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | $ 15,047 |  | $ 15,540 |
Policyholder account balance | 7,292 | [1] | 7,661 | [2]
At guaranteed minimum |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 5,187 |  | 5,533 |
1–50 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 854 |  | 893 |
51–150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 1,203 |  | 1,204 |
Greater than than 150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 48 |  | 31 |
Less than 2.00% |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 225 | [1] | 257 | [2]
Less than 2.00% | At guaranteed minimum |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 103 |  | 121 |
Less than 2.00% | 1–50 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 69 |  | 97 |
Less than 2.00% | 51–150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 53 |  | 39 |
Less than 2.00% | Greater than than 150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 0 |  | 0 |
2.00%–2.99% |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 909 | [1] | 1,282 | [2]
2.00%–2.99% | At guaranteed minimum |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 807 |  | 1,201 |
2.00%–2.99% | 1–50 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 102 |  | 81 |
2.00%–2.99% | 51–150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 0 |  | 0 |
2.00%–2.99% | Greater than than 150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 0 |  | 0 |
3.00%–3.99% |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 3,735 | [1] | 3,617 | [2]
3.00%–3.99% | At guaranteed minimum |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 1,887 |  | 1,732 |
3.00%–3.99% | 1–50 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 666 |  | 699 |
3.00%–3.99% | 51–150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 1,134 |  | 1,155 |
3.00%–3.99% | Greater than than 150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 48 |  | 31 |
4.00% and greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 2,423 | [1] | 2,505 | [2]
4.00% and greater | At guaranteed minimum |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 2,390 |  | 2,479 |
4.00% and greater | 1–50 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 17 |  | 16 |
4.00% and greater | 51–150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | 16 |  | 10 |
4.00% and greater | Greater than than 150 basis points above |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder account balance | $ 0 |  | $ 0 |
[1] | Excludes universal life insurance and investment contracts of approximately $4,654 million that have a market component to their crediting strategy.
[2] | Excludes universal life insurance and investment contracts of approximately $4,807 million that have a market component to their crediting strategy.

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