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Investments Subject to Significant Influence and Equity Income (Equity Method) (Details) - Equity Method Investee - Emera Inc. - Entity [Domain] - CAD ($)
$ in Millions

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Schedule of Equity Method Investments [Line Items]

Investments subject to significant influence

$ 1,312

$ 1,316

Income from equity investments

154

154

NSPML

Schedule of Equity Method Investments [Line Items]

Investments subject to significant influence

554

545

Income from equity investments

$ 46

45

Percentage of Ownership

100.00%

LIL

Schedule of Equity Method Investments [Line Items]

Investments subject to significant influence

^[1]

$ 579

534

Income from equity investments

^[1]

$ 45

42

Percentage of Ownership

^[1]

49.50%

M&NP

Schedule of Equity Method Investments [Line Items]

Investments subject to significant influence

^[2]

$ 138

155

Income from equity investments

^[2]

$ 22

22

Percentage of Ownership

^[2]

12.90%

Lucelec

Schedule of Equity Method Investments [Line Items]

Investments subject to significant influence

^[2]

$ 41

42

Income from equity investments

^[2]

$ 3

3

Percentage of Ownership

^[2]

19.10%

Bear Swamp

Schedule of Equity Method Investments [Line Items]

Investments subject to significant influence

^[3]

$ 0

0

Income from equity investments

^[3]

$ 35

38

Percentage of Ownership

^[3]

50.00%

Other Investments

Schedule of Equity Method Investments [Line Items]

Investments subject to significant influence

$ 0

40

Income from equity investments

$ 3

$ 4

[1]	Emera indirectly owns 100 per cent of the Class B units, which comprises 24.9 per cent of the total units issued. Emera’s percentage ownership in LIL ‎is subject to change, based on the balance of capital investments required from Emera and Nalcor Energy to complete construction of the LIL. Emera’s ultimate percentage investment in LIL will be determined upon final costing of all transmission projects related to the Muskrat Falls development, including the LIL, Labrador Transmission Assets and Maritime Link Projects, such that Emera’s total investment in the Maritime Link and LIL will equal 49 per cent of the cost of all of these transmission developments.
[2]	Although Emera’s ownership percentage of these entities is relatively low, it is considered to have significant influence over the operating and financial decisions of these companies through Board representation. Therefore, Emera records its investment in these entities using the equity method.
[3]	The investment balance in Bear Swamp is in a credit position, primarily a result of a $179 million distribution received in 2015. Bear Swamp's credit investment balance of $137 million (2018 - $172 million) is recorded in "Other long-term liabilities" on the Consolidated Balance Sheets.

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