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Insurance Contract Liabilities and Reinsurance Assets - Summary of Change in Insurance Contract Liabilities (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of changes in insurance contract liabilities [Line Items] |  |
Beginning balance | $ 304,605 | $ 297,505
New policies | 3,657 | 3,986
Normal in-force movement | 1,879 | 13,025
Changes in methods and assumptions | (782) | 324
Impact of U.S. Tax Reform |  | 2,246
Increase due to decision to change the portfolio asset mix supporting legacy businesses |  | 1,383
Impact of changes in foreign exchange rates | 19,295 | (13,864)
Ending balance | 328,654 | 304,605
Net actuarial liabilities [Member] |  |
Disclosure of changes in insurance contract liabilities [Line Items] |  |
Beginning balance | 263,091 | 251,738
New policies | 3,269 | 3,545
Normal in-force movement | 2,044 | 15,192
Changes in methods and assumptions | (173) | 305
Impact of U.S. Tax Reform |  | 2,246
Impact of annuity coinsurance transactions | (11,156) |
Increase due to decision to change the portfolio asset mix supporting legacy businesses |  | 1,340
Impact of changes in foreign exchange rates | 15,686 | (11,275)
Ending balance | 272,761 | 263,091
Other insurance contract liabilities [Member] |  |
Disclosure of changes in insurance contract liabilities [Line Items] |  |
Beginning balance | 11,155 | 10,815
Normal in-force movement | 985 | 930
Changes in methods and assumptions | (1) | (28)
Impact of changes in foreign exchange rates | 829 | (562)
Ending balance | 12,968 | 11,155
Net insurance contract liabilities [Member] |  |
Disclosure of changes in insurance contract liabilities [Line Items] |  |
Beginning balance | 274,246 | 262,553
New policies | 3,269 | 3,545
Normal in-force movement | 3,029 | 16,122
Changes in methods and assumptions | (174) | 277
Impact of U.S. Tax Reform |  | 2,246
Impact of annuity coinsurance transactions | (11,156) |
Increase due to decision to change the portfolio asset mix supporting legacy businesses |  | 1,340
Impact of changes in foreign exchange rates | 16,515 | (11,837)
Ending balance | 285,729 | 274,246
Reinsurance assets [member] |  |
Disclosure of changes in insurance contract liabilities [Line Items] |  |
Beginning balance | 30,359 | 34,952
New policies | 388 | 441
Normal in-force movement | (1,150) | (3,097)
Changes in methods and assumptions | (608) | 47
Impact of annuity coinsurance transactions | 11,156 |
Increase due to decision to change the portfolio asset mix supporting legacy businesses |  | 43
Impact of changes in foreign exchange rates | 2,780 | (2,027)
Ending balance | $ 42,925 | $ 30,359

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- Definition The increase in liabilities under insurance contracts and reinsurance contracts issued, resulting from additions other than through business combinations. [Refer: Liabilities under insurance contracts and reinsurance contracts issued; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph IG37 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_IG37_b&doctype=Implementation%20Guidance&book=b -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph 37 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_37_e&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The change in insurance liabilities resulting from the net exchange differences that arise on the translation of the financial statements into a different presentation currency, and on the translation of a foreign operation into the presentation currency. [Refer: Liabilities under insurance contracts and reinsurance contracts issued] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph IG37 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_IG37_f&doctype=Implementation%20Guidance&book=b -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph 37 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_37_e&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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- Definition The amount of liabilities under insurance contracts and reinsurance contracts issued. [Refer: Types of insurance contracts [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph 37 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_37_b&doctype=Standard&book=b -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph 37 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_37_e&doctype=Standard&book=b -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph IG20 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_IG20_a&doctype=Implementation%20Guidance&book=b -URIDate 2018-03-16 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph IG37 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_IG37_a&doctype=Implementation%20Guidance&book=b -URIDate 2018-03-16 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-02&anchor=para_55&doctype=Standard&book=b -URIDate 2018-03-16 + Details
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