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Risk Categories - Financial Liabilities and Contractual Obligations (Details) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | $ 313,219 | $ 287,646
Contractual loans, equities and mortgages | 3,800 | 2,933
Operating leases | 1,056 | 923
Total contractual commitments | 4,856 | 3,856
Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 20,523 | 18,439
Contractual loans, equities and mortgages | 1,157 | 1,138
Operating leases | 138 | 116
Total contractual commitments | 1,295 | 1,254
1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 9,635 | 8,704
Contractual loans, equities and mortgages | 1,044 | 820
Operating leases | 230 | 207
Total contractual commitments | 1,274 | 1,027
3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 9,326 | 8,916
Contractual loans, equities and mortgages | 536 | 214
Operating leases | 182 | 148
Total contractual commitments | 718 | 362
Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 273,735 | 251,587
Contractual loans, equities and mortgages | 1,063 | 761
Operating leases | 506 | 452
Total contractual commitments | 1,569 | 1,213
Insurance and investment contract liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 293,237 | 267,704
Insurance and investment contract liabilities | Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 11,950 | 10,242
Insurance and investment contract liabilities | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 8,388 | 7,552
Insurance and investment contract liabilities | 3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 8,653 | 7,729
Insurance and investment contract liabilities | Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 264,246 | 242,181
Senior debentures and unsecured financing |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 6,108 | 5,518
Senior debentures and unsecured financing | Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 438 | 120
Senior debentures and unsecured financing | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 556 | 516
Senior debentures and unsecured financing | 3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 234 | 489
Senior debentures and unsecured financing | Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 4,880 | 4,393
Subordinated Debt |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 4,241 | 4,857
Subordinated Debt | Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 103 | 126
Subordinated Debt | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 207 | 251
Subordinated Debt | 3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 207 | 251
Subordinated Debt | Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 3,724 | 4,229
Bond repurchase agreements |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 1,824 | 1,976
Bond repurchase agreements | Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 1,824 | 1,976
Bond repurchase agreements | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 0 | 0
Bond repurchase agreements | 3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 0 | 0
Bond repurchase agreements | Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 0 | 0
Accounts payable and accrued expenses |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 5,971 | 5,814
Accounts payable and accrued expenses | Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 5,971 | 5,814
Accounts payable and accrued expenses | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 0 | 0
Accounts payable and accrued expenses | 3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 0 | 0
Accounts payable and accrued expenses | Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 0 | 0
Secured borrowings from mortgage securitization |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 1,621 | 1,513
Secured borrowings from mortgage securitization | Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 182 | 81
Secured borrowings from mortgage securitization | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 435 | 333
Secured borrowings from mortgage securitization | 3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 187 | 398
Secured borrowings from mortgage securitization | Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 817 | 701
Borrowed funds |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 217 | 264
Borrowed funds | Under 1 Year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 55 | 80
Borrowed funds | 1 year to 3 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 49 | 52
Borrowed funds | 3 years to 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | 45 | 49
Borrowed funds | Over 5 years |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-derivative financial liabilities, undiscounted cash flows | $ 68 | $ 83

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