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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Taxes [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
The income tax provision, for the years ended December 31, differs from that computed using the statutory income tax rate for the following reasons:
millions of Canadian dollars | 2017 | 2016
Income before provision for income taxes | $ | 819 | $ | 244
Statutory income tax rate |  | 31% |  | 31%
Income taxes, at statutory income tax rate |  | 254 |  | 76
Revaluation of US non-regulated deferred income taxes |  | 317 |  | -
Deferred income taxes on regulated income recorded as regulatory assets and regulatory liabilities |  | (54) |  | (47)
Foreign tax rate variance |  | 36 |  | (5)
Financing deductions |  | (17) |  | (17)
Tax effect of equity earnings |  | (12) |  | (10)
Manufacturing and investment allowances |  | (8) |  | (7)
Non-taxable portion of gains on APUC transactions |  | - |  | (34)
Non-deductible portion of foreign exchange and mark-to-market adjustments related to the TECO Energy acquisition |  | - |  | 21
Other |  | 4 |  | 1
Income tax expense (recovery) | $ | 520 | $ | (22)
Effective income tax rate |  | 63% |  | (9%)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
millions of Canadian dollars | 2017 | 2016
Current income taxes |  |  |  |
Canada | $ | 24 | $ | 13
United States |  | 24 |  | 18
Other |  | 3 |  | 15
Deferred income taxes |  |  |  |
Canada |  | 3 |  | (113)
United States |  | 384 |  | 151
Other |  | (1) |  | -
Operating loss carry forwards |  |  |  |
Canada |  | (40) |  | (2)
United States |  | (194) |  | (104)
Revaluation of US non-regulated deferred income taxes |  |  |  |
United States |  | 317 |  | -
Income tax expense (recovery) | $ | 520 | $ | (22)
The following reflects the composition of income before provision for income taxes presented in the Consolidated Statements of Income for the years ended December 31:
millions of Canadian dollars | 2017 | 2016
Canada | $ | 88 | $ | 71
United States |  | 693 |  | 44
Other |  | 38 |  | 129
Income before provision for income taxes | $ | 819 | $ | 244
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
The deferred income tax assets and liabilities presented in the Consolidated Balance Sheets as at December 31 consisted of the following:
millions of Canadian dollars | 2017 | 2016
Deferred income tax assets: |  |  |  |
Tax loss carry forwards | $ | 853 | $ | 1,036
Tax credit carry forwards |  | 314 |  | 318
Regulatory liabilities - cost of removal |  | 208 |  | 388
Pension and post-retirement liabilities |  | 124 |  | 153
Derivative instruments |  | 107 |  | 150
Other |  | 394 |  | 490
Total deferred income tax assets before valuation allowance |  | 2,000 |  | 2,535
Valuation allowance |  | (105) |  | (58)
Total deferred income tax assets after valuation allowance | $ | 1,895 | $ | 2,477
Deferred income tax (liabilities): |  |  |  |
Property, plant and equipment | $ | (2,321) | $ | (3,553)
Derivative instruments |  | (155) |  | (202)
Other |  | (292) |  | (269)
Total deferred income tax liabilities | $ | (2,768) | $ | (4,024)
Consolidated Balance Sheets presentation: |  |  |  |
Long-term deferred income tax assets | $ | 138 | $ | 125
Long-term deferred income tax liabilities |  | (1,011) |  | (1,672)
Net deferred income tax liabilities | $ | (873) | $ | (1,547)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
millions of Canadian dollars | 2017 | 2016
Canada |  |  |  |
NOL | $ | 532 | $ | 199
Capital loss |  | 77 |  | 77
United States |  |  |  |
Federal NOL | $ | 2,926 | $ | 2,595
State NOL |  | 1,271 |  | 1,183
Capital loss |  | 13 |  | 14
Tax credit |  | 314 |  | 318
Other |  |  |  |
NOL | $ | 29 | $ | 22
Summary of Tax Credit Carryforwards [Table Text Block] |
The following table summarizes as at December 31, 2017 the deferred tax assets associated with NOL, capital loss and tax credit carry forwards and the associated expiration periods, and the valuation allowances for amounts which Emera has determined that realization is uncertain:
| Deferred Tax | Valuation | Net Deferred | Expiration
millions of Canadian dollars | Asset | Allowance | Tax Asset | Period
Canada |  |  |  |  |  |  |
NOL | $ | 164 | $ | (80) | $ | 84 | 2027-2037
Capital loss |  | 16 |  | (16) |  | - | Indefinite
United States |  |  |  |  |  |  |
Federal NOL | $ | 602 | $ | - | $ | 602 | 2024-2037
State NOL |  | 65 |  | (2) |  | 63 | 2024-2037
Capital loss |  | 2 |  | (2) |  | - | 2018-2019
Tax credit |  | 314 |  | - |  | 314 | 2019-Indefinite
Other |  |  |  |  |  |  |
NOL | $ | 4 | $ | (4) | $ | - | 2018-2024
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] |
millions of Canadian dollars | 2017 | 2016
Balance, January 1 | $ | 18 | $ | 6
Increases due to tax positions related to current year |  | 1 |  | 12
Balance, December 31 | $ | 19 | $ | 18

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