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Interests in Structured Entities - Securitized Holdings by the Type and Asset Quality (Detail) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | $ 1,972 | $ 2,154
AAA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 1,181 | 1,375
AA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 319 | 227
A |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 378 | 438
BBB |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 41 | 107
BB and below |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 53 | $ 7
CMBS |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 309 |
CMBS | AAA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 309 |
CMBS | AA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 0 |
CMBS | A |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 0 |
CMBS | BBB |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 0 |
CMBS | BB and below |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 0 |
RMBS |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 5 |
RMBS | AAA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 2 |
RMBS | AA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 0 |
RMBS | A |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 3 |
RMBS | BBB |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 0 |
RMBS | BB and below |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 0 |
ABS |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 1,658 |
ABS | AAA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 870 |
ABS | AA |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 319 |
ABS | A |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 375 |
ABS | BBB |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | 41 |
ABS | BB and below |  |
Disclosure of unconsolidated structured entities [Line Items] |  |
Securitized holdings | $ 53 |

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