Commitments and Contingencies - Additional Information (Details) - CAD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of contingent liabilities [line items] | ||
| Investment commitments outstanding | $ 16,879 | $ 15,367 |
| Letters of credit outstanding | 251 | 271 |
| Subordinated Debentures Due On December | The Manufacturers Life Insurance Company | ||
| Disclosure of contingent liabilities [line items] | ||
| Guaranteed payment of amounts on subordinated debenture | 650 | |
| Mature in 30 days | ||
| Disclosure of contingent liabilities [line items] | ||
| Investment commitments outstanding | 1,619 | 1,143 |
| Less than 1 year | ||
| Disclosure of contingent liabilities [line items] | ||
| Investment commitments outstanding | 3,334 | 3,217 |
| Mature after 1 year | ||
| Disclosure of contingent liabilities [line items] | ||
| Investment commitments outstanding | $ 11,926 | $ 11,007 |