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Commercial Mortgage Loans By Year of Origination and Credit Quality Indicator (Detail) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
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Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 6,692 | $ 6,829
Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 6,692 | 6,829
0% - 50% |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 2,280 | 2,368
0% - 50% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 2,280 |
51% - 60% |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 1,452 | 1,393
51% - 60% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 1,452 |
61% - 75% |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 2,910 | 3,018
61% - 75% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 2,910 |
76% - 100% |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 50 | 50
76% - 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 50 |
Greater than 100% |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 | 0
Greater than 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
Less than 1.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 253 | 265
1.00 - 1.25 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 255 | 263
1.26 - 1.50 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 1,223 | 1,196
1.51 - 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 2,569 | 2,611
Greater than 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 2,392 | $ 2,494
2024 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 129 |
2024 | 0% - 50% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 29 |
2024 | 51% - 60% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 6 |
2024 | 61% - 75% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 94 |
2024 | 76% - 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2024 | Greater than 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2024 | Less than 1.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2024 | 1.00 - 1.25 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 3 |
2024 | 1.26 - 1.50 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 59 |
2024 | 1.51 - 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 42 |
2024 | Greater than 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 25 |
2023 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 269 |
2023 | 0% - 50% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 20 |
2023 | 51% - 60% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 28 |
2023 | 61% - 75% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 221 |
2023 | 76% - 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2023 | Greater than 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2023 | Less than 1.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2023 | 1.00 - 1.25 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 14 |
2023 | 1.26 - 1.50 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 171 |
2023 | 1.51 - 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 65 |
2023 | Greater than 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 19 |
2022 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 919 |
2022 | 0% - 50% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 74 |
2022 | 51% - 60% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 107 |
2022 | 61% - 75% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 738 |
2022 | 76% - 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2022 | Greater than 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2022 | Less than 1.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 17 |
2022 | 1.00 - 1.25 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 37 |
2022 | 1.26 - 1.50 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 220 |
2022 | 1.51 - 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 391 |
2022 | Greater than 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 254 |
2021 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 894 |
2021 | 0% - 50% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 85 |
2021 | 51% - 60% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 239 |
2021 | 61% - 75% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 570 |
2021 | 76% - 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2021 | Greater than 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2021 | Less than 1.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 4 |
2021 | 1.00 - 1.25 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 9 |
2021 | 1.26 - 1.50 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 102 |
2021 | 1.51 - 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 416 |
2021 | Greater than 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 363 |
2020 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 470 |
2020 | 0% - 50% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 114 |
2020 | 51% - 60% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 105 |
2020 | 61% - 75% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 247 |
2020 | 76% - 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 4 |
2020 | Greater than 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2020 | Less than 1.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 17 |
2020 | 1.00 - 1.25 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 16 |
2020 | 1.26 - 1.50 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 66 |
2020 | 1.51 - 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 201 |
2020 | Greater than 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 170 |
2019 and prior | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 4,011 |
2019 and prior | 0% - 50% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 1,958 |
2019 and prior | 51% - 60% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 967 |
2019 and prior | 61% - 75% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 1,040 |
2019 and prior | 76% - 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 46 |
2019 and prior | Greater than 100% | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 0 |
2019 and prior | Less than 1.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 215 |
2019 and prior | 1.00 - 1.25 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 176 |
2019 and prior | 1.26 - 1.50 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 605 |
2019 and prior | 1.51 - 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | 1,454 |
2019 and prior | Greater than 2.00 | Fixed Rate Commercial Mortgage Loans |  |
Disclosure Of Commercial Mortgage Loans By Year Of Origination And Credit Quality Indicator [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 1,561 |

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