- Definition

Aggregate notional amount of derivative expressed in nonmonetary units, maturing in the next fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units, maturing in the fifth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	enb_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units, maturing in the fourth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryNotionalAmountOutstandingMaturingInYearFour
Namespace Prefix:	enb_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units, maturing in the third fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	enb_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in nonmonetary units, maturing in the second fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryNotionalAmountOutstandingMaturingInYearTwo
Namespace Prefix:	enb_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in a nonmonetary rate, maturing after the fifth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryRateNotionalAmountOutstandingMaturingInAfterYearFive
Namespace Prefix:	enb_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in a nonmonetary rate, maturing in the next fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryRateNotionalAmountOutstandingMaturingInNextTwelveMonths
Namespace Prefix:	enb_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in a nonmonetary rate, maturing in the fifth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryRateNotionalAmountOutstandingMaturingInYearFive
Namespace Prefix:	enb_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in a nonmonetary rate, maturing in the fourth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryRateNotionalAmountOutstandingMaturingInYearFour
Namespace Prefix:	enb_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in a nonmonetary rate, maturing in the third fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryRateNotionalAmountOutstandingMaturingInYearThree
Namespace Prefix:	enb_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount of derivative expressed in a nonmonetary rate, maturing in the second fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNonmonetaryRateNotionalAmountOutstandingMaturingInYearTwo
Namespace Prefix:	enb_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate notional amount outstanding, specified by the derivative(s), maturing after the fifth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Aggregate notional amount outstanding, specified by the derivative(s), maturing in the next fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Aggregate notional amount outstanding, specified by the derivative(s), maturing in the fifth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Aggregate notional amount outstanding, specified by the derivative(s), maturing in the fourth fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Aggregate notional amount outstanding, specified by the derivative(s), maturing in the third fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

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

- Definition

Aggregate notional amount outstanding, specified by the derivative(s), maturing in the second fiscal year following the balance sheet date.

+ References

No definition available.

+ Details

Name:	enb_DerivativeNotionalAmountOutstandingMaturingInYearTwo
Namespace Prefix:	enb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_USD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_GBP
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_EUR
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_CurrencyAxis=currency_JPY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=enb_ForeignExchangeForwardSellContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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

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

- Details

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

- Details

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

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
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Data Type:	na
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- Details

Name:	us-gaap_ProductOrServiceAxis=us-gaap_NaturalGasReservesMember
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Data Type:	na
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- Details

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Name:	us-gaap_ProductOrServiceAxis=us-gaap_NaturalGasLiquidsReservesMember
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- Details

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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - NOTIONAL PRINCIPAL OR QUANTITY INFORMATION (Details) MMcf in Thousands, € in Millions, ¥ in Millions, £ in Millions, CAD in Millions, $ in Millions	Jun. 30, 2017 JPY (¥) MWh MMcf MMBbls	Jun. 30, 2017 EUR (€) MWh MMcf MMBbls	Jun. 30, 2017 USD ($) MWh MMcf MMBbls	Jun. 30, 2017 GBP (£) MWh MMcf MMBbls	Jun. 30, 2017 CAD MWh MMcf MMBbls	Dec. 31, 2016 JPY (¥) MWh MMcf MMBbls	Dec. 31, 2016 USD ($) MWh MMcf MMBbls	Dec. 31, 2016 GBP (£) MWh MMcf MMBbls	Dec. 31, 2016 CAD MWh MMcf MMBbls
Foreign exchange contracts - forwards - purchase \| United States dollar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| $			$ 834				$ 991
2018 \| $			2				2
2019 \| $			2				2
2020 \| $			2				2
Foreign exchange contracts - forwards - purchase \| GBP
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| £				£ 62				£ 91
2018 \| £				9				6
Foreign exchange contracts - forwards - purchase \| Euro
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| €		€ 123
2018 \| €		256
2019 \| €		340
Foreign exchange contracts - forwards - purchase \| Japanese yen
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2019 \| ¥	¥ 32,662					¥ 32,662
Thereafter \| ¥	¥ 20,000
Foreign exchange contracts - forwards - sell \| United States dollar
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| $			3,816				4,369
2018 \| $			3,041				2,768
2019 \| $			3,246				2,943
2020 \| $			3,258				2,722
2021 \| $			567				566
Thereafter \| $			$ 223				$ 223
Foreign exchange contracts - forwards - sell \| GBP
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2019 \| £				89				89
2020 \| £				25				25
2021 \| £				27				27
Thereafter \| £				£ 177				£ 144
Foreign exchange contracts - forwards - sell \| Euro
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2020 \| €		35
2021 \| €		152
Thereafter \| €		€ 952
Interest rate contracts - short-term borrowings
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017					CAD 2,958				CAD 6,713
2018					5,051				5,161
2019					1,629				1,581
2020					220				153
2021					98				100
Thereafter					296				300
Interest rate contracts - long-term receive fixed rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017					891
2018					1,302
2019					900
2020					671
2021					345
Thereafter					320
Interest rate contracts - long-term debt pay fixed rate
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017					2,439				3,998
2018					2,714				2,743
2019					762				768
Equity contracts
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017					48				48
2018					CAD 40				CAD 40
Commodity contracts \| Natural gas
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| MMcf	(81)	(81)	(81)	(81)	(81)	(93)	(93)	(93)	(93)
2018 \| MMcf	(62)	(62)	(62)	(62)	(62)	(42)	(42)	(42)	(42)
2019 \| MMcf	(10)	(10)	(10)	(10)	(10)	(17)	(17)	(17)	(17)
2020 \| MMcf						(9)	(9)	(9)	(9)
2021 \| MMcf	(1)	(1)	(1)	(1)	(1)
Commodity contracts \| Crude oil
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| MMBbls	(2)	(2)	(2)	(2)	(2)	(11)	(11)	(11)	(11)
2018 \| MMBbls	(10)	(10)	(10)	(10)	(10)	(9)	(9)	(9)	(9)
Commodity contracts \| NGL
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| MMBbls	(5)	(5)	(5)	(5)	(5)	(8)	(8)	(8)	(8)
2018 \| MMBbls	(10)	(10)	(10)	(10)	(10)	(6)	(6)	(6)	(6)
Commodity contracts \| Power
RISK MANAGEMENT AND FINANCIAL INSTRUMENTS
2017 \| MWh	43	43	43	43	43	40	40	40	40
2018 \| MWh	30	30	30	30	30	30	30	30	30
2019 \| MWh	31	31	31	31	31	31	31	31	31
2020 \| MWh	35	35	35	35	35	35	35	35	35
2021 \| MWh	(3)	(3)	(3)	(3)	(3)	(3)	(3)	(3)	(3)
Thereafter \| MWh	(43)	(43)	(43)	(43)	(43)	(43)	(43)	(43)	(43)