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v3.19.3.a.u2

Goodwill (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 CAD ($) MWh | Dec. 31, 2018 CAD ($) MWh
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | $ 464 | $ 464
Hydro |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 258 | 259
Wind and Solar |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | 176 | 175
Energy Marketing |  |
Disclosure of detailed information about intangible assets [line items] |  |
Goodwill | $ 30 | $ 30
Minimum |  |
Disclosure of detailed information about intangible assets [line items] |  |
Electricity prices | MWh | 5 | 6
Discount rate used to calculate goodwill impairment | 3.60% | 5.30%
Maximum |  |
Disclosure of detailed information about intangible assets [line items] |  |
Electricity prices | MWh | 183 | 179
Discount rate used to calculate goodwill impairment | 7.00% | 6.60%

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