Represents the capacity in megawatts of the wind project acquired.

No definition available.

Name:	enb_BusinessAcquisitionCapacityOfWindProject
Namespace Prefix:	enb_
Data Type:	num:powerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage points added to the variable reference rate for the calculation of cumulative dividends.

+ References

No definition available.

+ Details

Name:	enb_CumulativeDividendsSpreadOverVariableReferenceRate
Namespace Prefix:	enb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The distance off shore of the wind project.

+ References

No definition available.

+ Details

Name:	enb_DistanceLocationOffShore
Namespace Prefix:	enb_
Data Type:	num:lengthItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents disclosure of the amount of dividends received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentDividends
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the estimated aggregate cost of the final total investment accounted for under the equity method of accounting.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentEstimatedAggregateCost
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the number of shares sold through secondary offering, during the period.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentNumberOfSharesSoldThroughSecondaryOffering
Namespace Prefix:	enb_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the ownership interest of equity investee in the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentOwnershipInterestHeldByEquityInvesteeInEntity
Namespace Prefix:	enb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting that was sold.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentOwnershipPercentageSold
Namespace Prefix:	enb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract
Namespace Prefix:	enb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the commodity costs reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationCommodityCosts
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of deferred costs and other assets reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationDeferredCostsAndOtherAssets
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of the depreciation and amortization costs reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortizationCosts
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the earnings before income taxes reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationEarningsBeforeIncomeTaxes
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of intangible assets net reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationFiniteLivedIntangibleAssetsNet
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of goodwill reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationGoodwill
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cost of borrowed funds accounted for as interest that was charged against earnings during the period reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of long-term debt reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of net assets (i.e. assets, net of liabilities) reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationNetAssets
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of the operating and administrative costs reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndAdministrativeCosts
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the other income (expense) reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationOtherIncomeExpense
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of other long-term liabilities reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationOtherLongTermLiabilities
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of property plant and equipment net reported by an equity method investment of the entity.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentSummarizedFinancialInformationPropertyPlantAndEquipment
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the unamortized excess of purchase price over underlying net book value of investee's assets at the purchase date recorded as unamortized assets.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentUnamortizedExcessPurchasePriceOverNetBookValueAmortizableAssets
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the unamortized excess of purchase price over underlying net book value of the investee's assets at the purchase date recorded as goodwill.

+ References

No definition available.

+ Details

Name:	enb_EquityMethodInvestmentUnamortizedExcessPurchasePriceOverNetBookValueGoodwill
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the indirect pro-rata interest of the entity in its own shares.

+ References

No definition available.

+ Details

Name:	enb_IndirectProRataInterestOfEntityInItsOwnShares
Namespace Prefix:	enb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total number of investors in the project.

+ References

No definition available.

+ Details

Name:	enb_NumberOfTotalInvestorsInProject
Namespace Prefix:	enb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The period that the power purchase agreement lasts.

+ References

No definition available.

+ Details

Name:	enb_PowerPurchaseAgreementPeriod
Namespace Prefix:	enb_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the maturity period of the Government of Canada bond.

+ References

No definition available.

+ Details

Name:	enb_PreferredStockQuarterlyFloatingRateCumulativeDividendPerShareCalculationMaturityPeriodOfGovernmentOfCanadaBond
Namespace Prefix:	enb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the reduction in equity investment and shareholder's equity due to reciprocal investment.

+ References

No definition available.

+ Details

Name:	enb_ReductionInEquityInvestmentAndShareholdingsDueToReciprocalInvestment
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of current assets reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(g))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721683-107760

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph bb
-Article 1

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph w
-Article 1

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph g
-Subparagraph 1, 2
-Article 4

+ Details

Name:	us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of current liabilities reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721683-107760

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(g))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph g
-Subparagraph 1, 2
-Article 4

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph w
-Article 1

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph bb
-Article 1

+ Details

Name:	us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721683-107760

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

+ References

+ Details

Name:	us-gaap_LongTermInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Other long-term investments not otherwise specified in the taxonomy, not including investments in marketable securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_OtherLongTermInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_SouthernAccessExtensionProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=enb_LiquidsPipelinesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_SeawayPipelineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_OffshoreJointVenturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=enb_GasPipelinesAndProcessingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_RampionOffshoreWindProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=enb_UKGreenInvestmentBankPLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=enb_EONClimateAndRenewablesUKLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=enb_GreenPowerAndTransmissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_VectorPipelineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_AuxSableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_AlliancePipelineCanadaAndUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_TexasExpressPipelineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_EnbridgeRailPhiladelphiaLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_EmergingTechnologiesAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_EnbridgeInsuranceBarbadosOilLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=enb_EliminationAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_EnbridgeUSInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_OtherEquityInvesteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=enb_NovercoIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_GasDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM INVESTMENTS (Details) £ in Millions, shares in Millions, CAD in Millions	1 Months Ended					12 Months Ended
	Nov. 30, 2015 GBP (£)	Nov. 30, 2015 GBP (£) item	Nov. 30, 2015 GBP (£) mi	Nov. 30, 2015 GBP (£) km	Nov. 30, 2015 GBP (£) MW	Dec. 31, 2015 CAD	Dec. 31, 2014 CAD shares	Dec. 31, 2015 GBP (£)	Dec. 31, 2015 CAD	Nov. 30, 2015 CAD	Nov. 04, 2015	Jul. 01, 2014
LONG TERM INVESTMENTS
Long term investments							CAD 5,408		CAD 7,008
Goodwill							742		885
Amortizable assets							494		568
Dividends received						CAD 719	564
Income statement of unconsolidated equity investments
Revenues						1,557	1,790
Commodity costs						(369)	(661)
Operating and administrative expense						(376)	(444)
Depreciation and amortization						(274)	(232)
Other income/(expense)						4	(1)
Interest expense						(67)	(84)
Earnings before income taxes						475	368
Balance sheet of unconsolidated equity investments
Current assets							472		389
Property, plant and equipment, net							5,214		6,602
Deferred amounts and other assets							34		40
Intangible assets, net							77		64
Goodwill							742		885
Current liabilities							(712)		(500)
Long-term debt							(811)		(854)
Other long-term liabilities							(85)		(167)
Net assets							4,931		CAD 6,459
Preference shares \| Minimum
LONG TERM INVESTMENTS
Cumulative dividends based on average yield of Government of Canada bonds, spread over reference rate (as a percent)								4.30%	4.30%
Preference shares \| Maximum
LONG TERM INVESTMENTS
Cumulative dividends based on average yield of Government of Canada bonds, spread over reference rate (as a percent)								4.40%	4.40%
Southern Access Extension Project
LONG TERM INVESTMENTS
Ownership Interest (as a percent)												65.00%
Balance sheet of unconsolidated equity investments
Ownership percent sold												35.00%
Southern Access Extension Project \| Liquids Pipelines
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								65.00%	65.00%
Equity Investments							263		CAD 713
Seaway Crude Pipeline System \| Liquids Pipelines
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								50.00%	50.00%
Equity Investments							2,782		CAD 3,251
Offshore - various joint ventures \| Gas Pipelines And Processing
LONG TERM INVESTMENTS
Equity Investments							429		CAD 479
Offshore - various joint ventures \| Gas Pipelines And Processing \| Minimum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								22.00%	22.00%
Offshore - various joint ventures \| Gas Pipelines And Processing \| Maximum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								74.30%	74.30%
Rampion Offshore Wind Project
LONG TERM INVESTMENTS
Ownership Interest (as a percent)	24.90%	24.90%	24.90%	24.90%	24.90%					24.90%	24.90%
Balance sheet of unconsolidated equity investments
Wind project capacity \| MW					400
Distance off the shore from the UK Sussex coast			8	13
Estimated aggregate amount of investment	£ 370.0	£ 370.0	£ 370.0	£ 370.0	£ 370.0					CAD 750
Amount of investment								£ 96.9	CAD 201
Power purchase agreement period	15 years
Total number of investors \| item		3
Rampion Offshore Wind Project \| UK Green Investment Bank plc
LONG TERM INVESTMENTS
Ownership Interest (as a percent)	25.00%	25.00%	25.00%	25.00%	25.00%					25.00%
Rampion Offshore Wind Project \| E.ON Climate And Renewables UK Limited
LONG TERM INVESTMENTS
Ownership Interest (as a percent)	50.10%	50.10%	50.10%	50.10%	50.10%					50.10%
Rampion Offshore Wind Project \| Green Power and Transmission
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								24.90%	24.90%
Equity Investments									CAD 201
Vector Pipeline \| Gas Pipelines And Processing
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								60.00%	60.00%
Equity Investments							141		CAD 159
Aux Sable \| Gas Pipelines And Processing
LONG TERM INVESTMENTS
Equity Investments							311		CAD 344
Aux Sable \| Gas Pipelines And Processing \| Minimum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								42.70%	42.70%
Aux Sable \| Gas Pipelines And Processing \| Maximum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								50.00%	50.00%
Alliance Pipeline \| Gas Pipelines And Processing
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								50.00%	50.00%
Equity Investments							374		CAD 427
Texas Express Pipeline \| Gas Pipelines And Processing
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								35.00%	35.00%
Equity Investments							442		CAD 515
Enbridge Rail (Philadelphia) L.L.C. \| Liquids Pipelines
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								75.00%	75.00%
Equity Investments							7		CAD 168
Emerging Technologies and Other \| Green Power and Transmission
LONG TERM INVESTMENTS
Other Long-Term Investments							55		54
Enbridge Insurance (Barbados Oil) Limited \| Eliminations and Other
LONG TERM INVESTMENTS
Other Long-Term Investments							23		35
Enbridge (U.S.) Inc. \| Eliminations and Other
LONG TERM INVESTMENTS
Other Long-Term Investments							29		35
Other Equity Investments \| Liquids Pipelines
LONG TERM INVESTMENTS
Equity Investments							58		CAD 69
Other Equity Investments \| Liquids Pipelines \| Minimum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								30.00%	30.00%
Other Equity Investments \| Liquids Pipelines \| Maximum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								43.90%	43.90%
Other Equity Investments \| Gas Pipelines And Processing
LONG TERM INVESTMENTS
Equity Investments							10		CAD 12
Other Equity Investments \| Gas Pipelines And Processing \| Minimum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								33.30%	33.30%
Other Equity Investments \| Gas Pipelines And Processing \| Maximum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								70.00%	70.00%
Other Equity Investments \| Green Power and Transmission
LONG TERM INVESTMENTS
Equity Investments							92		CAD 94
Other Equity Investments \| Green Power and Transmission \| Minimum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								24.90%	24.90%
Other Equity Investments \| Green Power and Transmission \| Maximum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								50.00%	50.00%
Other Equity Investments \| Eliminations and Other
LONG TERM INVESTMENTS
Equity Investments							22		CAD 27
Other Long-Term Investments							CAD 47		CAD 66
Other Equity Investments \| Eliminations and Other \| Minimum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								19.00%	19.00%
Other Equity Investments \| Eliminations and Other \| Maximum
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								21.00%	21.00%
Noverco \| Common shares
LONG TERM INVESTMENTS
Ownership Interest (as a percent)							38.90%	38.90%	38.90%
Balance sheet of unconsolidated equity investments
Ownership interest (as a percent)							3.60%	3.60%	3.60%
Number of shares sold through secondary offering \| shares							1.3
Indirect pro-rata interest of the entity in the shares of the entity (as a percent)							1.40%	1.40%	1.40%
Amount reduced from equity investment and shareholder's equity by the reciprocal shareholding						CAD 83	CAD 83
Noverco \| Common shares \| Gas Distribution
LONG TERM INVESTMENTS
Ownership Interest (as a percent)								38.90%	38.90%
Noverco \| Preference shares
Balance sheet of unconsolidated equity investments
Cumulative dividends per share calculation, maturity period of Government of Canada bond						10 years
Noverco \| Preference shares \| Minimum
LONG TERM INVESTMENTS
Cumulative dividends based on average yield of Government of Canada bonds, spread over reference rate (as a percent)								4.30%	4.30%
Noverco \| Preference shares \| Maximum
LONG TERM INVESTMENTS
Cumulative dividends based on average yield of Government of Canada bonds, spread over reference rate (as a percent)								4.40%	4.40%
Noverco \| Preference shares \| Gas Distribution
LONG TERM INVESTMENTS
Other Long-Term Investments							CAD 323		CAD 359