Represents the amount of contributions made to the variable interest entity.

No definition available.

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

- Definition

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

+ References

No definition available.

+ Details

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

- 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 amount of debt of the variable interest entity that is guaranteed by the reporting entity.

+ References

No definition available.

+ Details

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

- Definition

The percentage of equity financing from the tax equity investor.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685

+ Details

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

- Definition

The net carrying amount of the consolidated Variable Interest Entity's assets and liabilities included in the reporting entity's statement of financial position.

+ References

No definition available.

+ Details

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

- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

+ References

+ Details

Name:	us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=52262685&loc=SL6759159-111685

+ Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=enb_MagicValleyAndWildcatWindFarmsMember
Namespace Prefix:
Data Type:	na
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- Details

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VARIABLE INTEREST ENTITIES (Details) - CAD CAD in Millions	1 Months Ended	12 Months Ended
VARIABLE INTEREST ENTITIES (Details) - CAD CAD in Millions	Jan. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
The fund
VARIABLE INTEREST ENTITY
Economic interest (as a percent)		89.20%	66.40%	67.30%
Direct ownership percentage		49.20%	11.90%	15.50%
Consolidated assets		CAD 113	CAD 4,085
Consolidated liabilities		2,601	3,213
Amount of guaranteed debt outstanding		CAD 2,404	CAD 2,544
Enbridge Commercial Trust
VARIABLE INTEREST ENTITY
Ownership interest (as a percent)		0.00%
Magicat Holdco LLC
VARIABLE INTEREST ENTITY
Ownership interest (as a percent)			80.00%
Keechi Holdings L.L.C.
VARIABLE INTEREST ENTITY
Tax equity investor financed percentage	65.00%
Contributed amount		CAD 204	CAD 168
Magic Valley and Wildcat Wind Farms
VARIABLE INTEREST ENTITY
Equity Investment		394	394
Balance sheet
Net assets		394	394
Magic Valley and Wildcat Wind Farms and Keechi Holdings LLC
VARIABLE INTEREST ENTITY
Consolidated assets		1,147	970
Consolidated liabilities		CAD 49	CAD 44