Represents the deemed debt structure inherent in the toll or rate.

No definition available.

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

- Definition

Represents the deemed equity structure inherent in the toll or rate.

+ References

No definition available.

+ Details

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

- Definition

Represents the amount of costs permitted to be recovered under the defined benefit plan as per the rate order received from the OEB.

+ References

No definition available.

+ Details

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

- Definition

Represents the amount of costs permitted to be recovered under the defined benefit plan, after tax, as per the rate order received from the OEB.

+ References

No definition available.

+ Details

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

- Definition

Represents the percent of return allowed to earn and fully retain over the base return.

+ References

No definition available.

+ Details

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

- Details

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

- Definition

Represents the after-tax rate of return on equity.

+ References

No definition available.

+ Details

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

- Definition

Represents the term for collection of costs permitted to be recovered under the defined benefit plan, in rates.

+ References

No definition available.

+ Details

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

- Definition

Represents the term of calculation on a revenue per customer basis, with the Ontario Energy Board (OEB).

+ References

No definition available.

+ Details

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

- Definition

Represents the term of Canadian local toll.

+ References

No definition available.

+ Details

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

- Definition

The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 980

-SubTopic 340

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

+ Details

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

- Details

Name:	enb_RegulatedBusinessOperationsAxis=enb_CanadianMainlineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	enb_RegulatedBusinessOperationsAxis=enb_EnbridgeGasDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	enb_RegulatedBusinessOperationsAxis=enb_SouthernLightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

FINANCIAL STATEMENT EFFECTS OF RATE REGULATION (Details) (CAD) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
GENERAL INFORMATION ON RATE REGULATION AND ITS EFFECTS
Regulatory assets	0us-gaap_RegulatoryAssets
Canadian Mainline
GENERAL INFORMATION ON RATE REGULATION AND ITS EFFECTS
Term of CLT	10 years
Southern Lights Pipeline
GENERAL INFORMATION ON RATE REGULATION AND ITS EFFECTS
After-tax ROE (as a percent)	10.00%
Percentage of debt	70.00%
Percentage of equity	30.00%
Enbridge Gas Distribution
GENERAL INFORMATION ON RATE REGULATION AND ITS EFFECTS
Term of calculation on a revenue per customer basis, with the OEB			5 years
Percent of return allowed to earn and fully retain over the base return			1.00%
After-tax ROE (as a percent)	9.40%	8.90%
Percentage of equity	36.00%	36.00%
Amount of OPEB costs permitted to be recovered as per the rate order received from the OEB		89
Amount of OPEB costs after tax, permitted to be recovered as per the rate order received from the OEB		63
Term for collection of OPEB costs in rates commencing from 2013		20 years