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Common Stock (Tables) | 12 Months Ended
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Dec. 31, 2016
Common Stock [Abstract] |
Schedule of Common Stock Outstanding Roll Forward [Table Text Block] |
Authorized: Unlimited number of non-par value common shares. |  |  |  |  |  |
| 2016 |  | 2015
Issued and outstanding: | millions of shares | millions of Canadian dollars |  | millions of shares | millions of Canadian dollars
Balance, January 1 | 147.21 | $ | 2,157 |  | 143.78 | $ | 2,016
Conversion of Convertible Debentures | 51.99 |  | 2,115 |  | - |  | -
Issuance of common stock (1) | 7.69 |  | 338 |  | 1.25 |  | 54
Issued for cash under Purchase Plans at market rate | 2.51 |  | 115 |  | 2.10 |  | 88
Discount on shares purchased under Dividend Reinvestment Plan | - |  | (5) |  | - |  | (4)
Options exercised under senior management share option plan | 0.62 |  | 17 |  | 0.08 |  | 2
Stock-based compensation | - |  | 1 |  | - |  | 1
Balance, December 31 | 210.02 | $ | 4,738 |  | 147.21 | $ | 2,157
(1) In Q1 2016, Emera issued 0.06 million common shares to facilitate the creation and issuance of 0.2 million depositary receipts in connection with the ECI amalgamation transaction. The depositary receipts are listed on the Barbados Stock Exchange. In addition, Emera completed an offering of 7.63 million common shares in December 2016, at $45.25 per common share, for net proceeds of approximately $345 million. The net proceeds were $335 million after $10 million of issuance costs, net of taxes.

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- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
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