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Income Taxes - Narrative (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | $ 2,282 | $ 1,848
Unused tax losses for which a deferred tax asset has not been recognised | 696 | 499
Capital tax losses for which no deferred tax asset recognised | 181 | 137
Temporary differences associated with investments in subsidiaries, branches, joint ventures and associates for which a deferred tax liability has not been recognised | $ 5,711 | $ 5,452
Applicable tax rates | 27.75% | 26.30%
Benefit related to remeasurement of deferred tax balances | $ 86 |
Losses available for carry forward |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Accumulated non-capital tax losses | $ 4,349 | $ 3,758
Bottom of range |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Applicable tax rates | 0.00% |
Top of range |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Applicable tax rates | 25.00% |
United States |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Net capital losses | $ 10 | 7
United States | Losses available for carry forward |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 2 | 3
Canada |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Net capital losses | 0 | 13
Capital losses | 275 | 178
United Kingdom |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Capital losses | $ 434 | $ 452

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