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Risk Management - Schedule of Distribution of Debt Securities and Private Placements Portfolio by Sector and Industry (Detail) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 221,348 | $ 206,132
% of total | 100.00% | 100.00%
Government and agency [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 73,858 | $ 71,888
% of total | 33.00% | 35.00%
Utilities [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 41,929 | $ 40,568
% of total | 19.00% | 20.00%
Financial [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 31,340 | $ 27,923
% of total | 14.00% | 13.00%
Energy [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 17,685 | $ 16,428
% of total | 8.00% | 8.00%
Industrial [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 17,508 | $ 14,691
% of total | 8.00% | 7.00%
Consumer (non-cyclical) [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 16,483 | $ 14,009
% of total | 7.00% | 7.00%
Consumer (cyclical) [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 7,707 | $ 5,916
% of total | 3.00% | 3.00%
Securitized [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 3,300 | $ 3,577
% of total | 2.00% | 2.00%
Telecommunications [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 3,716 | $ 3,324
% of total | 2.00% | 2.00%
Basic materials [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 3,539 | $ 3,248
% of total | 2.00% | 2.00%
Technology [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 2,352 | $ 2,475
% of total | 1.00% | 1.00%
Media and internet [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 1,112 | $ 1,136
% of total | 1.00% |
Diversified and miscellaneous [Member] |  |
Disclosure of Distribution of Debt Securities and Private Placement Portfolio by Sector and Industry [line items] |  |
Carrying value | $ 819 | $ 949

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