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Goodwill and Intangible Assets - Goodwill Allocated to CGUs (Details) - CAD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill impairment | $ 0 | $ 0 |
Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 5,832,000,000 | 5,412,000,000 | $ 5,183,000,000
SLF Canada, Individual | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 1,100,000,000 | 1,100,000,000 |
SLF Canada, Group retirement services | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 453,000,000 | 453,000,000 |
SLF Canada, Group benefits | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 1,054,000,000 | 1,054,000,000 |
SLF US, Employee benefits group | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 1,083,000,000 | 1,138,000,000 |
SLF Asia | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 676,000,000 | 705,000,000 |
SLF Asset Management, MFS | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 494,000,000 | 515,000,000 |
SLF Asset Management, SLIM | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | 787,000,000 | 260,000,000 |
Corporate, UK | Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Goodwill | $ 185,000,000 | $ 187,000,000 |
Bottom of range |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Price-to-earnings multiples used for valuation | 10.5 |  |
Price-to-assets-under-management multiples used for valuation | 0.70% |  |
CGU discount rate | 9.00% |  |
Top of range |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Price-to-earnings multiples used for valuation | 11.5 |  |
Price-to-assets-under-management multiples used for valuation | 2.00% |  |
CGU discount rate | 12.50% |  |
Income approach | Bottom of range |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Future sales projection for valuation, in years | 10 years |  |
Income approach | Top of range |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Future sales projection for valuation, in years | 15 years |  |

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- Definition The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2019-01-01 -Paragraph 134 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_d_v&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2019-01-01 -Paragraph 134 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_e_v&doctype=Standard -URIDate 2019-03-27 + Details
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