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Other Income (Expenses), Net (Components of other income (expenses), net) (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
9. Other Income (Expenses), Net    
Allowance for equity funds used during construction $ 45 $ 21
Gain on sale of Emera Maine, net of transaction costs 585 0
TECO Guatemala Holdings award 49 0
Other 29 (9)
Other income (expenses), net $ 708 $ 12