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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS (Details)	12 Months Ended
	Dec. 31, 2014
Maximum
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Floating rate debt as a percentage of total debt outstanding	25.00%enb_FloatingRateDebtAsTargetPercentageOfTotalDebtOutstanding / us-gaap_RangeAxis = us-gaap_MaximumMember
Foreign Exchange Risk
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Period to hedge a minimum level of foreign currency denominated earnings exposures	5 years
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Average swap rate (as a percent)	2.10%us-gaap_DerivativeAverageVariableInterestRate / us-gaap_DerivativeInstrumentRiskAxis = enb_InterestRateContractForShortTermBorrowingsMember
Interest rate contracts - long-term debt
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Average swap rate (as a percent)	4.10%us-gaap_DerivativeAverageVariableInterestRate / us-gaap_DerivativeInstrumentRiskAxis = enb_InterestRateContractForLongTermBorrowingsMember
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
Number of forms of stock-based compensation with equity price risk	1enb_NumberOfTypesOfEquityWithPriceRiskManagedViaEquityDerivatives / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EquityContractMember

X

- Definition

Represents the floating rate debt as a target percentage of the total debt outstanding.

+ References

No definition available.

+ Details

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

X

- Definition

Future period of time over which foreign currency denominated earnings exposures may be economically hedged.

+ References

No definition available.

+ Details

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

X

- Definition

Represents number of forms of stock-based compensation with equity price risk managed via equity derivatives.

+ References

No definition available.

+ Details

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

X

- Definition

Average variable interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=enb_InterestRateContractForLongTermBorrowingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=enb_InterestRateContractForShortTermBorrowingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_EquityContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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