Represents the percentage of economic interest held by the reporting entity.

No definition available.

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

- Definition

Represents the value of consideration received from the transfer of businesses between segments within the entity.

+ References

No definition available.

+ Details

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

- Definition

Represents the value of debt assumed from the transfer of businesses between segments within the entity.

+ References

No definition available.

+ Details

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

- Definition

Represents the value of units received from the transfer of businesses between segments within the entity.

+ References

No definition available.

+ Details

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

- Definition

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

+ References

No definition available.

+ Details

Name:	enb_VariableInterestEntityEconomicOwnershipPercentage
Namespace Prefix:	enb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

+ Details

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

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_UnderlyingAssetClassAxis=enb_CanadianLiquidsPipelineBusinessAndCertainCanadianRenewableEnergyAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=enb_EnbridgeIncomePartnersLPMember
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:	us-gaap_StatementBusinessSegmentsAxis=enb_SponsoredInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

GENERAL BUSINESS DESCRIPTION (Details) CAD in Billions		1 Months Ended	12 Months Ended
GENERAL BUSINESS DESCRIPTION (Details) CAD in Billions	Sep. 01, 2015 CAD	Aug. 31, 2015	Dec. 31, 2015 item	Dec. 31, 2014	Dec. 31, 2013
General business description
Number of operating segments \| item			5
Canadian Liquids Pipeline business and certain Canadian renewable energy assets
General business description
Consideration transferred	CAD 30.4
Amount of units received in transfer	CAD 18.7
The fund
General business description
Economic interest (as a percent)	91.90%	66.40%
The fund \| Canadian Liquids Pipeline business and certain Canadian renewable energy assets
General business description
Amount of units received in transfer	CAD 3.0
Debt assumed in transfer	11.7
Enbridge Income Partners LP \| Canadian Liquids Pipeline business and certain Canadian renewable energy assets
General business description
Amount of units received in transfer	CAD 15.7
Enbridge Energy Partners, L.P.
General business description
Economic interest ownership percentage			35.70%	33.70%	20.60%
Sponsored Investments \| Alliance Pipeline
General business description
Interest (as a percent)			50.00%
Sponsored Investments \| The fund
General business description
Economic interest (as a percent)			89.20%	66.40%
Sponsored Investments \| Enbridge Energy Partners, L.P.
General business description
Economic interest ownership percentage			35.70%	33.70%