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v3.19.3.a.u2

Employee Future Benefits (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 CAD ($) age | Dec. 31, 2019 CAD ($) | Dec. 31, 2019 CAD ($) year | Dec. 31, 2019 CAD ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2017 CAD ($)
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Administration expenses |  | $ 2.0 |  |  | $ 1.0 | $ 2.0
Weighted average duration of defined benefit obligation | year |  |  | 15.6 |  |  |
Minimum |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Employer contribution (as percent) |  |  |  | 500.00% |  |
Maximum |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Employer contribution (as percent) |  |  |  | 1000.00% |  |
Registered |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Administration expenses |  | 2.0 |  |  | 1.0 | 2.0
Registered | Letter of credit |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Letter of credit, posted | $ 83.0 | 83.0 | $ 83.0 | $ 83.0 |  |
Registered | Related parties [member] |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Administration expenses |  | 0.0 |  |  | 0.1 |
Supplemental Pension Plan |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Administration expenses |  | 0.0 |  |  | 0.0 | 0.0
Other |  |  |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |  |  |
Maximum age disabled and retired members eligible for benefits | 65 |  |  | 65 |  |
Administration expenses |  | $ 0.0 |  |  | $ 0.0 | $ 0.0

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