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OTHER INCOME/(EXPENSE) (Details) (CAD) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OTHER INCOME/(EXPENSE)
Net foreign currency gains/(loss)	(400)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax	(272)us-gaap_ForeignCurrencyTransactionGainLossBeforeTax	71us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Allowance for equity funds used during construction	3us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	1us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions
Interest income on affiliate loans	20enb_InterestIncomeOnAffiliateLoans	23enb_InterestIncomeOnAffiliateLoans	20enb_InterestIncomeOnAffiliateLoans
Interest income	3us-gaap_InvestmentIncomeInterest	4us-gaap_InvestmentIncomeInterest	7us-gaap_InvestmentIncomeInterest
Noverco preferred shares dividend income	42us-gaap_InvestmentIncomeDividend	40us-gaap_InvestmentIncomeDividend	42us-gaap_InvestmentIncomeDividend
Gain on disposition (Note 6)	38us-gaap_GainLossOnDispositionOfAssets1	18us-gaap_GainLossOnDispositionOfAssets1
OPEB recovery (Note 5)			89enb_OPEBCostsPermittedToBeRecovered
Other	28us-gaap_OtherNonoperatingIncome	51us-gaap_OtherNonoperatingIncome	8us-gaap_OtherNonoperatingIncome
Other Nonoperating Income (Expense), Total	(266)us-gaap_OtherNonoperatingIncomeExpense	(135)us-gaap_OtherNonoperatingIncomeExpense	238us-gaap_OtherNonoperatingIncomeExpense

X

- Definition

Represents the interest income aroused on loans given to affiliates of the entity.

+ References

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X

- Definition

Represents the amount of costs permitted to be recovered from the other postretirements benefits as per the rate order received from the OEB.

+ References

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X

- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894



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- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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Amount of dividend income on nonoperating securities.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 5



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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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Total increase in earnings in the period representing the cost of equity (based on assumed rate of return) and/or borrowed funds (based on interest rate) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments.

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