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Exchangeable Securities - Option To Exchange (Details) - Option to exchange - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about borrowings [line items] |  |
Fair value | $ 0 | $ 0
Minimum |  |
Disclosure of detailed information about borrowings [line items] |  |
Sensitivity percentage | 0 | 0
Maximum |  |
Disclosure of detailed information about borrowings [line items] |  |
Sensitivity percentage | $ (32) | $ (33)

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