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Invested Assets and Investment Income - Schedule of Investment Income (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of Investment Income [line items] |  |
Rental income, net of depreciation | $ 840 | $ 825
Total investment income (loss) | 19,318 | 1,558
Investment income | 16,180 | 15,204
Investment expenses | (1,297) | (1,221)
Net investment income (loss) | 18,021 | 337
Debt securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 7,677 | 7,155
Gains (losses) | 414 | (1,050)
Impairment loss, net | (4) |
Cash and short-term securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 837 | 313
Gains (losses) | 10 | 121
Public equities [Member] |  |
Disclosure of Investment Income [line items] |  |
Dividend income | 625 | 548
Gains (losses) | 2,255 | (3,995)
Impairment loss, net |  |
Mortgages [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 2,290 | 1,914
Gains (losses) | 99 | (52)
Provision, net | (150) | 1
Private placements [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 2,318 | 2,008
Gains (losses) | 375 | 233
Impairment loss, net | (72) |
Loans to Bank clients [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 201 | 138
Provision, net | (3) | (4)
Real estate [Member] |  |
Disclosure of Investment Income [line items] |  |
Rental income, net of depreciation | 496 | 490
Gains (losses) | (1,286) | (591)
Derivatives [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | (561) | 515
Gains (losses) | 1,147 | (10,639)
Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 40 | 20
Energy, timber, agriculture and other income | 2,197 | 2,862
Gains (losses) | 488 | 1,645
Impairment loss, net | (75) | (74)
Interest income [member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 12,802 | 12,063
Dividend, rental and other income [member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 3,318 | 3,900
Impairments, provisions and recoveries, net [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | (304) | (77)
Other [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 364 | (682)
Insurance And Investment Contract [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 3,138 | (13,646)
Insurance And Investment Contract [Member] | Debt securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 430 | (504)
Insurance And Investment Contract [Member] | Public equities [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 2,157 | (3,825)
Insurance And Investment Contract [Member] | Mortgages [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 99 | (52)
Insurance And Investment Contract [Member] | Private placements [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 375 | 234
Insurance And Investment Contract [Member] | Real estate [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | (1,289) | (578)
Insurance And Investment Contract [Member] | Derivatives [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 875 | (10,712)
Insurance And Investment Contract [Member] | Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 491 | 1,791
FVTPL [Member] |  |
Disclosure of Investment Income [line items] |  |
Total investment income (loss) | 6,576 | (8,989)
Investment income | 2,788 | 3,883
FVTPL [Member] | Debt securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 212 | 139
Gains (losses) | 152 |
FVTPL [Member] | Public equities [Member] |  |
Disclosure of Investment Income [line items] |  |
Dividend income | 625 | 548
Gains (losses) | 2,255 | (3,995)
FVTPL [Member] | Mortgages [Member] |  |
Disclosure of Investment Income [line items] |  |
Gains (losses) | 99 |
FVTPL [Member] | Private placements [Member] |  |
Disclosure of Investment Income [line items] |  |
Gains (losses) | 20 |
FVTPL [Member] | Loans to Bank clients [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income |  | 0
Provision, net |  | 0
FVTPL [Member] | Real estate [Member] |  |
Disclosure of Investment Income [line items] |  |
Rental income, net of depreciation |  | 0
Gains (losses) |  | 0
FVTPL [Member] | Derivatives [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | (561) | 515
Gains (losses) | 1,147 | (10,639)
FVTPL [Member] | Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 17 | 14
Energy, timber, agriculture and other income | 2,197 | 2,862
Gains (losses) | 487 | 1,641
Impairment loss, net | (74) | (74)
FVTPL [Member] | Interest income [member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | (332) | 668
FVTPL [Member] | Dividend, rental and other income [member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 2,822 | 3,410
FVTPL [Member] | Impairments, provisions and recoveries, net [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | (74) | (74)
FVTPL [Member] | Other [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 372 | (121)
FVTPL [Member] | Insurance And Investment Contract [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 3,788 | (12,872)
FVTPL [Member] | Insurance And Investment Contract [Member] | Debt securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 153 |
FVTPL [Member] | Insurance And Investment Contract [Member] | Public equities [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 2,157 | (3,825)
FVTPL [Member] | Insurance And Investment Contract [Member] | Mortgages [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 99 |
FVTPL [Member] | Insurance And Investment Contract [Member] | Private placements [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 20 |
FVTPL [Member] | Insurance And Investment Contract [Member] | Real estate [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets |  | 0
FVTPL [Member] | Insurance And Investment Contract [Member] | Derivatives [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 875 | (10,712)
FVTPL [Member] | Insurance And Investment Contract [Member] | Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 484 | 1,665
FVOCI [Member] |  |
Disclosure of Investment Income [line items] |  |
Total investment income (loss) | 13,456 | 10,487
Investment income | 12,817 | 10,683
FVOCI [Member] | Debt securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 7,437 | 6,990
Gains (losses) | 262 | (1,050)
Impairment loss, net | (4) |
FVOCI [Member] | Cash and short-term securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 837 | 313
Gains (losses) | 10 | 121
FVOCI [Member] | Mortgages [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 2,290 | 1,914
Gains (losses) |  | (52)
Provision, net |  | 0
FVOCI [Member] | Private placements [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 2,318 | 2,008
Gains (losses) | 355 | 233
Impairment loss, net | (72) |
FVOCI [Member] | Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 23 | 6
Gains (losses) |  | 4
FVOCI [Member] | Interest income [member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 12,905 | 11,231
FVOCI [Member] | Impairments, provisions and recoveries, net [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | (76) | 0
FVOCI [Member] | Other [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | (12) | (548)
FVOCI [Member] | Insurance And Investment Contract [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 639 | (196)
FVOCI [Member] | Insurance And Investment Contract [Member] | Debt securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 277 | (504)
FVOCI [Member] | Insurance And Investment Contract [Member] | Mortgages [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets |  | (52)
FVOCI [Member] | Insurance And Investment Contract [Member] | Private placements [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 355 | 234
FVOCI [Member] | Insurance And Investment Contract [Member] | Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | 7 | 126
Other [Member] |  |
Disclosure of Investment Income [line items] |  |
Total investment income (loss) | (714) | 60
Investment income | 575 | 638
Other [Member] | Debt securities [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 28 | 26
Other [Member] | Mortgages [Member] |  |
Disclosure of Investment Income [line items] |  |
Provision, net | (150) | 1
Other [Member] | Loans to Bank clients [Member] |  |
Disclosure of Investment Income [line items] |  |
Interest income | 201 | 138
Provision, net | (3) | (4)
Other [Member] | Real estate [Member] |  |
Disclosure of Investment Income [line items] |  |
Rental income, net of depreciation | 496 | 490
Gains (losses) | (1,286) | (591)
Other [Member] | Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Gains (losses) | 1 |
Impairment loss, net | (1) |
Other [Member] | Interest income [member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 229 | 164
Other [Member] | Dividend, rental and other income [member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 496 | 490
Other [Member] | Impairments, provisions and recoveries, net [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | (154) | (3)
Other [Member] | Other [Member] |  |
Disclosure of Investment Income [line items] |  |
Investment income | 4 | (13)
Other [Member] | Insurance And Investment Contract [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | (1,289) | (578)
Other [Member] | Insurance And Investment Contract [Member] | Real estate [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets | $ (1,289) | (578)
Other [Member] | Insurance And Investment Contract [Member] | Derivatives [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets |  | 0
Other [Member] | Insurance And Investment Contract [Member] | Other invested assets [Member] |  |
Disclosure of Investment Income [line items] |  |
Realized and unrealized gains (losses) on assets |  | $ 0

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