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Insurance and Reinsurance Contract Assets and Liabilities - Effect of New Business Recognized in the Year (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | $ (372) | $ (77)
Amount included in reinsurance assets for the year | 57 | 72
Estimates of present value of cash outflows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | (20,816) | (1,997)
Estimates of PV of future cash flows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 18,990 | 1,933
Risk adjustment for non-financial risk | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 1,261 | 399
Contractual service margin | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 622 | (263)
Non-Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 0 | 0
Non-Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 35,333 | 22,211
Non-Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 6,426 | 4,295
Non-Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 28,907 | 17,916
Non-Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | (39,381) | (25,541)
Non-Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 853 | 962
Non-Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 3,195 | 2,368
Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 104 | 253
Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 2,170 | 3,796
Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 398 | 623
Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 1,772 | 3,173
Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | (2,165) | (3,761)
Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 99 | 218
Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 0 | 0
Asia | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 16 | 12
Asia | Estimates of present value of cash outflows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | (7,144) | (916)
Asia | Estimates of PV of future cash flows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 6,950 | 815
Asia | Risk adjustment for non-financial risk | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 189 | 170
Asia | Contractual service margin | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 21 | (57)
Asia | Non-Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 0 | 0
Asia | Non-Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 26,508 | 16,209
Asia | Non-Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 4,764 | 3,011
Asia | Non-Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 21,744 | 13,198
Asia | Non-Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | (29,664) | (18,765)
Asia | Non-Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 600 | 679
Asia | Non-Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 2,556 | 1,877
Asia | Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 44 | 158
Asia | Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 1,019 | 2,399
Asia | Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 147 | 322
Asia | Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 872 | 2,077
Asia | Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | (1,002) | (2,330)
Asia | Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 27 | 89
Asia | Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 0 | 0
Canada | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 8 | 13
Canada | Estimates of present value of cash outflows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | (6,153) | (331)
Canada | Estimates of PV of future cash flows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 5,876 | 319
Canada | Risk adjustment for non-financial risk | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 68 | 76
Canada | Contractual service margin | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 217 | (51)
Canada | Non-Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 0 | 0
Canada | Non-Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 5,386 | 3,478
Canada | Non-Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 860 | 608
Canada | Non-Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 4,526 | 2,870
Canada | Non-Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | (5,876) | (3,823)
Canada | Non-Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 117 | 115
Canada | Non-Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 373 | 230
Canada | Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 16 | 26
Canada | Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 193 | 271
Canada | Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 40 | 68
Canada | Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 153 | 203
Canada | Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | (203) | (286)
Canada | Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 26 | 41
Canada | Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 0 | 0
U.S. | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 33 | 47
U.S. | Estimates of present value of cash outflows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | (7,519) | (750)
U.S. | Estimates of PV of future cash flows | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 6,164 | 799
U.S. | Risk adjustment for non-financial risk | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 1,004 | 153
U.S. | Contractual service margin | Reinsurance contracts held |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Amount included in reinsurance assets for the year | 384 | (155)
U.S. | Non-Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 0 | 0
U.S. | Non-Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 3,439 | 2,524
U.S. | Non-Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 802 | 676
U.S. | Non-Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 2,637 | 1,848
U.S. | Non-Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | (3,841) | (2,953)
U.S. | Non-Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 136 | 168
U.S. | Non-Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Contracts initially recognized during the year | 266 | 261
U.S. | Onerous | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 44 | 69
U.S. | Onerous | Estimates of present value of cash outflows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 958 | 1,126
U.S. | Onerous | Insurance acquisition cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 211 | 233
U.S. | Onerous | Claims and other insurance service expenses payable | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 747 | 893
U.S. | Onerous | Estimates of PV of future cash flows | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | (960) | (1,145)
U.S. | Onerous | Risk adjustment for non-financial risk | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | 46 | 88
U.S. | Onerous | Contractual service margin | Insurance contracts issued |  |
Disclosure of effect of insurance contracts initially recognised [line items] |  |
Recoveries and reversals of recoveries of losses on onerous underlying contracts | $ 0 | $ 0

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- Definition The increase (decrease) in insurance contracts liability (asset) resulting from the effects of contracts initially recognised in the period. [Refer: Insurance contracts liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 107 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_107&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 104 -Subparagraph a -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_104_a_iii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in insurance contracts liability (asset) resulting from the effects of groups of onerous contracts initially recognised in the period. An insurance contract is onerous at the date of initial recognition if the fulfilment cash flows allocated to the contract, any previously recognised acquisition cash flows and any cash flows arising from the contract at the date of initial recognition in total are a net outflow. [Refer: Insurance contracts liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 108 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_108_b&doctype=Standard -URIDate 2024-03-27 + Details
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