Adjustment to Paid in Capital, Restructuring

No definition available.

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

- Definition

Percentage of distributions per unit in excess of the first per-unit distribution threshold but equal to or less than the second distribution threshold, to which holders of the specified class of units are entitled.

+ References

No definition available.

+ Details

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

- Definition

Percentage of distributions per unit in excess of the second per-unit distribution threshold to which holders of the specified class of units are entitled.

+ References

No definition available.

+ Details

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

- Definition

First threshold level of distributions on common units, used to determine distribution rights.

+ References

No definition available.

+ Details

Name:	enb_CommonUnitsFirstDistributionThreshold
Namespace Prefix:	enb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Quarterly distributions to be paid by the entity per common unit.

+ References

No definition available.

+ Details

Name:	enb_CommonUnitsQuarterlyDistributionPerUnit
Namespace Prefix:	enb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of common units to which the unitholders have irrevocably waived all rights.

+ References

No definition available.

+ Details

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

- Definition

Second threshold level of distributions on common units, used to determine distribution rights.

+ References

No definition available.

+ Details

Name:	enb_CommonUnitsSecondDistributionThreshold
Namespace Prefix:	enb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Additional percentage of the combined equity method investment effective interest that the entity has the option to acquire through a joint funding arrangement.

+ References

No definition available.

+ Details

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

- Definition

Percentage of the combined equity method investment effective interest owned by the entity through a joint funding arrangement.

+ References

No definition available.

+ Details

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

- Definition

Period of an option to acquire an additional portion of the combined effective interest in an equity method investment through a joint funding arrangement.

+ References

No definition available.

+ Details

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

- Definition

Noncontrolling Interest, Restructuring

+ References

No definition available.

+ Details

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

- Definition

Security Shareholders Entitlement Share Ratio

+ References

No definition available.

+ Details

Name:	enb_SecurityShareholdersEntitlementShareRatio
Namespace Prefix:	enb_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Shareholder Entitlement Cash Payment Per Share

+ References

No definition available.

+ Details

Name:	enb_ShareholderEntitlementCashPaymentPerShare
Namespace Prefix:	enb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Variable Interest Entity, Qualitative or Quantitative Information, Ownership, Shares

+ References

No definition available.

+ Details

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

- Definition

Amount of other increase (decrease) in additional paid in capital (APIC).

+ References

No definition available.

+ Details

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

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of liabilities assumed at the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472

+ Details

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

- Definition

Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
Namespace Prefix:	us-gaap_
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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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

- Definition

The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

+ Details

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

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(24))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(22))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Definition

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569655-111683

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4616395-111683

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_MinorityInterestDecreaseFromRedemptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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

- Definition

Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683

+ Details

Name:	us-gaap_MinorityInterestPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569655-111683

+ Details

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

- Definition

Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners.

+ References

+ Details

Name:	us-gaap_PartnersCapitalAccountRedemptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of units sold in a private placement of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

+ References

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitsSoldInPrivatePlacement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

+ Details

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

- Definition

The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

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

- Definition

The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Value of stock issued pursuant to acquisitions during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=108788376&loc=SL6759159-111685

+ Details

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=enb_EnbridgeGasDistributionIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=enb_SpectraEnergyPartnersLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=enb_EnbridgeEnergyPartnersLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=enb_EnbridgeEnergyManagementLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=enb_EnbridgeIncomeFundHoldingsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=enb_StrategicReviewActionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=enb_EnbridgeInc.AsCounterpartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=enb_EnbridgeEnergyPartnersandEnbridgeEnergyManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=enb_SpectraEnergyPartnersLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=enb_MidcoastEnergyPartnersLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=enb_MidcoastPublicUnitholdersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=enb_EnbridgeEnergyPartnersLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=enb_EnbridgeIncomeFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PreferredUnitsByNameAxis=enb_PreferredUnitsSeries1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LimitedPartnersCapitalAccountByClassAxis=enb_CommonUnitsClassaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LimitedPartnersCapitalAccountByClassAxis=enb_CommonUnitsClassDMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LimitedPartnersCapitalAccountByClassAxis=enb_IncentiveDistributionUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LimitedPartnersCapitalAccountByClassAxis=enb_CommonUnitsClassFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=enb_BakkenPipelineSystemMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=enb_EnbridgeEnergyPartnersLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=enb_EnbridgeEnergyManagementLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_NoncontrollingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AdditionalPaidInCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=enb_DeferredIncomeTaxLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=enb_CanadianRenewableAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=enb_UnitedStatesRenewableAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=enb_SpectraEnergyPartnersLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=enb_IncentiveDistributionRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=enb_EnbridgeIncomeFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_OtherRestructuringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

NONCONTROLLING INTERESTS - NONCONTROLLING INFORMATION (Details) $ / shares in Units, $ / shares in Units, $ in Millions						3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 17, 2018 $ / shares	Jan. 22, 2018 shares	Jun. 28, 2017 USD ($)	Apr. 28, 2017 CAD ($)	Apr. 27, 2017 USD ($) $ / shares shares	Sep. 30, 2018 CAD ($)	Sep. 30, 2018 CAD ($)	Dec. 31, 2018 CAD ($)	Dec. 31, 2017 CAD ($)	Dec. 31, 2016 CAD ($)	Aug. 01, 2018	Apr. 28, 2017 $ / shares	Feb. 15, 2017
NONCONTROLLING INTERESTS
Noncontrolling interest, decrease from purchase of interests								$ 4,469,000,000	$ 0	$ 0
Noncontrolling interests								3,965,000,000	7,597,000,000
Enbridge Gas Distribution Inc.
NONCONTROLLING INTERESTS
Noncontrolling interests								$ 0	100,000,000
Spectra Energy Partners, LP
NONCONTROLLING INTERESTS
Security shareholders entitlement share ratio								1.111
Stock issued during period, shares, conversion of units (in shares) \| shares		172,500,000
Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Security shareholders entitlement share ratio								0.335
Noncontrolling interests								$ 0	138,000,000
Common units, quarterly distribution per unit \| $ / shares					$ 0.583							$ 0.35
Enbridge Energy Management, L.L.C. (EEM)
NONCONTROLLING INTERESTS
Security shareholders entitlement share ratio								0.335
Noncontrolling interests								$ 0	34,000,000
Enbridge Income Fund Holdings Inc
NONCONTROLLING INTERESTS
Security shareholders entitlement share ratio	0.735
Shareholder entitlement cash payment per share \| $ / shares	$ 0.45
Strategic Review Actions \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Increase to additional paid in capital				$ 421,000,000
Increase (decrease) to deferred income taxes				253,000,000
Increase (decrease) in noncontrolling interest				$ 458,000,000
Enbridge Inc. \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Repayments of related party debt					$ 1,500
Enbridge Energy Partners and Enbridge Energy Management
NONCONTROLLING INTERESTS
Increase to additional paid in capital								3,700,000,000
Increase (decrease) to deferred income taxes								(707,000,000)
Increase (decrease) in noncontrolling interest								185,000,000
Spectra Energy Partners, LP
NONCONTROLLING INTERESTS
Noncontrolling interest, decrease from purchase of interests								3,000,000,000
Increase to additional paid in capital								642,000,000
Increase (decrease) to deferred income taxes								(167,000,000)
Midcoast Energy Partners, L.P.
NONCONTROLLING INTERESTS
Total ownership interest (as a percent)			100.00%
Midcoast Energy Partners, L.P. \| Midcoast Public Unitholders
NONCONTROLLING INTERESTS
Purchase price					170
Midcoast Energy Partners, L.P. \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Payments to acquire businesses, gross			$ 1,300
Liabilities assumed			$ 953
Enbridge Income Fund
NONCONTROLLING INTERESTS
Noncontrolling interest, decrease from purchase of interests								4,500,000,000
Increase to additional paid in capital								25,000,000
Increase (decrease) to deferred income taxes								0
Preferred Units Series1 \| Enbridge Inc. \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Partners' capital account, redemptions					$ 1,200
Common Units Class A \| Enbridge Inc. \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Partners' capital account, units, sold in private placement \| shares					64,300,000
Common Units Class D \| Enbridge Inc. \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Common units rights waived, number of units \| shares					66,100,000
Incentive Distribution Units \| Enbridge Inc. \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Common units rights waived, number of units \| shares					1,000
Common Units Class F \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Common units distribution percentage above first threshold					13.00%
Common units first distribution threshold \| $ / shares					$ 0.295
Common units second distribution threshold \| $ / shares					$ 0.35
Common units distribution percentage above second threshold					23.00%
Common Units Class F \| Enbridge Inc. \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Partners' capital account, units, sold in private placement \| shares					1,000
Bakken Pipeline System
NONCONTROLLING INTERESTS
Joint funding arrangement, ownership percentage					75.00%
Ownership interest (as a percent)					27.60%
Bakken Pipeline System \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Joint funding arrangement, ownership percentage					25.00%
Ownership interest (as a percent)													27.60%
Joint funding arrangement, period of option to purchase additional interest					5 years
Joint funding arrangement, additional interest under option					20.00%
Common shares
NONCONTROLLING INTERESTS
Common shares issued in acquisition, amount								12,727,000,000
Common shares \| Enbridge Energy Partners, L.P.
NONCONTROLLING INTERESTS
Common shares issued in acquisition, amount								3,042,000,000	0	0
Common shares \| Enbridge Energy Management, L.L.C. (EEM)
NONCONTROLLING INTERESTS
Common shares issued in acquisition, amount								1,267,000,000	0	0
Common shares \| Spectra Energy Partners, LP
NONCONTROLLING INTERESTS
Common shares issued in acquisition, amount								3,888,000,000	0	0
Common shares \| Enbridge Income Fund
NONCONTROLLING INTERESTS
Common shares issued in acquisition, amount								4,530,000,000	$ 0	$ 0
Noncontrolling Interest
NONCONTROLLING INTERESTS
Noncontrolling interest, decrease from purchase of interests								2,657,000,000
Sale of noncontrolling interest in subsidiaries						$ (1,183,000,000)		1,183,000,000
Noncontrolling interest, restructuring							$ 1,500,000,000	1,486,000,000
Additional paid-in capital
NONCONTROLLING INTERESTS
Sale of noncontrolling interest in subsidiaries						79,000,000		79,000,000
Dilution gain on Spectra Energy Partners, LP restructuring (Note 20)							1,100,000,000	$ 1,136,000,000
Deferred Income Tax Liability
NONCONTROLLING INTERESTS
Sale of noncontrolling interest in subsidiaries						$ 27,000,000
Canadian Renewable Assets \| Discontinued Operations, Disposed of by Sale
NONCONTROLLING INTERESTS
Noncontrolling interest, ownership percentage by parent											49.00%
United States Renewable Assets \| Discontinued Operations, Disposed of by Sale
NONCONTROLLING INTERESTS
Noncontrolling interest, ownership percentage by parent											49.00%
Spectra Energy Partners, LP
NONCONTROLLING INTERESTS
Noncontrolling interest, ownership percentage by parent									75.00%
Incentive Distribution Rights \| Spectra Energy Partners, LP
NONCONTROLLING INTERESTS
Noncontrolling interest, ownership percentage by parent									100.00%
Enbridge Income Fund
NONCONTROLLING INTERESTS
Ownership interest percentage held by noncontrolling owners									56.50%	45.60%
Variable Interest Entity, Primary Beneficiary
NONCONTROLLING INTERESTS
Shares owned (in shares) \| shares		403,000,000
Direct common interest (as a percent)		83.00%
Other Restructuring \| Spectra Energy Partners, LP
NONCONTROLLING INTERESTS
Increase (decrease) to deferred income taxes							$ 333,000,000