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Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Income Taxes [Abstract]
Reconciliation of Effective Income Tax Rate	The income tax provision, for the years ended December 31, differs from that computed using the enacted combined Canadian federal and provincial statutory income tax rate for the following reasons: millions of dollars 2023 2022 Income before provision for income taxes $ 1,173 $ 1,194 Statutory income tax rate 29.0% 29.0% Income taxes, at statutory income tax rate 340 346 Deferred income taxes on regulated income recorded as regulatory assets and regulatory liabilities (72) (70) Tax credits (53) (18) Foreign tax rate variance (36) (44) Amortization of deferred income tax regulatory liabilities (33) (33) Tax effect of equity earnings (15) (10) GBPC impairment charge  - 21 Other (3) (7) Income tax expense $ 128 $ 185 Effective income tax rate 11% 15%
Composition of Taxes on Income from Continuing Operations	millions of dollars 2023 2022 Current income taxes  Canada $ 26 $ 25  United States 5 8 Deferred income taxes  Canada 93 122  United States 128 252 Investment tax credits  United States (29) (7) Operating loss carryforwards  Canada (93) (94)  United States (2) (121) Income tax expense $ 128 $ 185 The following table 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 dollars 2023 2022 Canada $ 171 $ 173 United States 964 1,063 Other 38 (42) Income before provision for income taxes $ 1,173 $ 1,194
Schedule of Deferred Income Tax Assets and Liabilities	The deferred income tax assets and liabilities presented in the Consolidated Balance Sheets as at December 31 consisted of the following: millions of dollars 2023 2022 Deferred income tax assets: Tax loss carryforwards $ 1,195 $ 1,207 Tax credit carryforwards 454 415 Derivative instruments 205 45 Regulatory liabilities  175 264 Other 372 341 Total deferred income tax assets before valuation allowance 2,401 2,272 Valuation allowance (363) (312) Total deferred income tax assets after valuation allowance $ 2,038 $ 1,960 Deferred income tax (liabilities): PP&E $ (3,223) $ (2,981) Derivative instruments (235) (125) Investments subject to significant influence (216) (181) Regulatory assets (196) (310) Other (312) (322) Total deferred income tax liabilities  $ (4,182) $ (3,919) Consolidated Balance Sheets presentation: Long-term deferred income tax assets $ 208 $ 237 Long-term deferred income tax liabilities (2,352) (2,196) Net deferred income tax liabilities $ (2,144) $ (1,959)
Net Operating Loss ("NOL"), Capital Loss and Tax Credit Carryforwards and Their Expiration Periods	Emera’s NOL, capital loss and tax credit carryforwards and their expiration periods as at December 31, 2023 consisted of the following: Subject to Tax Valuation Net Tax Expiration millions of dollars Carryforwards Allowance Carryforwards Period Canada  NOL $ 2,914 $ (1,164) $ 1,750 2026 - 2043  Capital loss 73 (73) - Indefinite United States  Federal NOL $ 1,360 $ (1) $ 1,359 2036 - Indefinite  State NOL 1,003 (1) 1,002 2026 - Indefinite  Tax credit 454 (3) 451 2025 - 2043 Other  NOL $ 81 $ (28) $ 53 2024 - 2030
Details of Change in Unrecognized Tax Benefits	millions of dollars 2023 2022 Balance, January 1 $ 33 $ 28 Increases due to tax positions related to current year 5 5 Increases due to tax positions related to a prior year 1 2 Decreases due to tax positions related to a prior year (2) (2) Balance, December 31 $ 37 $ 33

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of the change in unrecognized tax benefits.

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Tabular disclosure of tax credit carryforwards available to reduce future taxable income, including amounts, expiration dates, limitations on use and the related deferred tax assets and valuation allowances.

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