XML 167 R142.htm IDEA: XBRL DOCUMENT
v3.6.0.2

SUBSEQUENT EVENTS (Details) - Subsequent Event € in Millions, $ in Millions, CAD in Billions |  |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 17, 2017 EUR (€) | Feb. 17, 2017 EUR (€) mi | Feb. 17, 2017 EUR (€) km | Feb. 17, 2017 EUR (€) MW | Jan. 27, 2017 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2017 EUR (€) | Dec. 31, 2017 CAD | Feb. 17, 2017 CAD | Feb. 15, 2017 bbl / d | Feb. 15, 2017 mi | Feb. 15, 2017 km | Feb. 15, 2017 USD ($) | Feb. 15, 2017
Joint funding of Line 3 Replacement Program |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project development and construction costs (as a percent) |  |  |  |  | 99.00% |  |  |  |  |  |  |  |  |
Reimbursement for capital expenditures on project |  |  |  |  | $ 450 |  |  |  |  |  |  |  |  |
Enbridge Energy Partners, L.P. | Joint funding of Line 3 Replacement Program |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Project development and construction costs (as a percent) |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |
Option to acquire interest in completed project (as a percent) |  |  |  |  | 40.00% |  |  |  |  |  |  |  |  |
Enbridge Energy Partners, L.P. | Joint funding of Eastern Access projects |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional interest acquired in project (as a percent) |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  |
Amount paid to acquire additional interest in projects |  |  |  |  | $ 360 |  |  |  |  |  |  |  |  |
Midcoast Energy Partners, L.P. | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  | $ 170 |  |  |  |  |  |  |  |
Hohe See Offshore Wind Project |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) | 50.00% | 50.00% | 50.00% | 50.00% |  |  |  |  | 50.00% |  |  |  |  |
Wind project capacity | MW |  |  |  | 497 |  |  |  |  |  |  |  |  |  |
Distance off the shore from the coast of Germany |  | 61 | 98 |  |  |  |  |  |  |  |  |  |  |
Period of revenue support by government | 20 years |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated total amount of investment | € 1,070 | € 1,070 | € 1,070 | € 1,070 |  |  |  |  | CAD 1.7 |  |  |  |  |
Hohe See Offshore Wind Project | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Planned spend |  |  |  |  |  |  | € 440 | CAD 0.6 |  |  |  |  |  |
Bakken Pipeline System |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 27.60%
Purchase price |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500 |
Bakken Pipeline System | Dakota Access Pipeline project |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Length of 30-inch pipeline |  |  |  |  |  |  |  |  |  |  | 1,172 | 1,886 |  |
Potential expanded capacity to deliver crude oil (in bpd) | bbl / d |  |  |  |  |  |  |  |  |  | 570,000 |  |  |  |
Bakken Pipeline System | Dakota Access Pipeline project | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial capacity to deliver crude oil (in bpd) | bbl / d |  |  |  |  |  |  |  |  |  | 470,000 |  |  |  |
Bakken Pipeline System | Energy Transfer Crude Oil Pipeline project |  |  |  |  |  |  |  |  |  |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Length of new 30-inch diameter pipe |  |  |  |  |  |  |  |  |  |  | 62 | 100 |  |
Length of converted 30-inch diameter pipe |  |  |  |  |  |  |  |  |  |  | 686 | 1,104 |  |
Length of converted 24-inch diameter pipe |  |  |  |  |  |  |  |  |  |  | 40 | 64 |  |

X
- Definition Percentage of additional interest acquired in projects under the terms of a joint funding agreement. + References No definition available. + Details
Name: | enb_AdditionalInterestAcquiredInProjectPercentage
Namespace Prefix: | enb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the capacity in megawatts of the wind project acquired. + References No definition available. + Details
Name: | enb_BusinessAcquisitionCapacityOfWindProject
Namespace Prefix: | enb_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The distance off shore of the wind project. + References No definition available. + Details
Name: | enb_DistanceLocationOffShore
Namespace Prefix: | enb_
Data Type: | num:lengthItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the estimated aggregate cost of the final total investment accounted for under the equity method of accounting. + References No definition available. + Details
Name: | enb_EquityMethodInvestmentEstimatedAggregateCost
Namespace Prefix: | enb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Initial capacity of the pipeline to deliver crude oil. + References No definition available. + Details
Name: | enb_InitialCapacityToDeliverCrudeOil
Namespace Prefix: | enb_
Data Type: | us-types:flowItemType
Balance Type: | na
Period Type: | instant

X
- Definition Length of 30-inch diameter pipeline. + References No definition available. + Details
Name: | enb_LengthOf30InchPipeline
Namespace Prefix: | enb_
Data Type: | num:lengthItemType
Balance Type: | na
Period Type: | instant

X
- Definition Length of converted 24-inch diameter pipeline. + References No definition available. + Details
Name: | enb_LengthOfConverted24InchPipeline
Namespace Prefix: | enb_
Data Type: | num:lengthItemType
Balance Type: | na
Period Type: | instant

X
- Definition Length of converted 30-inch diameter pipeline. + References No definition available. + Details
Name: | enb_LengthOfConverted30InchPipeline
Namespace Prefix: | enb_
Data Type: | num:lengthItemType
Balance Type: | na
Period Type: | instant

X
- Definition Length of new 30-inch diameter pipeline. + References No definition available. + Details
Name: | enb_LengthOfNew30InchPipeline
Namespace Prefix: | enb_
Data Type: | num:lengthItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage interest in the project that the entity has the option to acquire once the project is completed and in service. + References No definition available. + Details
Name: | enb_OptionToAcquirePercentageOfInterestInProject
Namespace Prefix: | enb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cash outflow to acquire additional interest in projects under the terms of a joint funding agreement. + References No definition available. + Details
Name: | enb_PaymentsToAcquireAdditionalInterestInProject
Namespace Prefix: | enb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Period of revenue support by government. + References No definition available. + Details
Name: | enb_PeriodOfRevenueSupportByGovernment
Namespace Prefix: | enb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The capacity for delivery of crude oil to which the pipeline has the potential to be expanded. + References No definition available. + Details
Name: | enb_PotentialCapacityToDeliverCrudeOil
Namespace Prefix: | enb_
Data Type: | us-types:flowItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of project development and construction costs for which the entity is responsible per the terms of an agreement. + References No definition available. + Details
Name: | enb_ProjectDevelopmentAndConstructionCostsPercentage
Namespace Prefix: | enb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of reimbursement paid to date for capital expenditures on the project. + References No definition available. + Details
Name: | enb_ReimbursementForCapitalExpendituresOnProject
Namespace Prefix: | enb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the aggregate cost of investments 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 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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=66011266&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=enb_JointFundingLineThreeReplacementProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=enb_EnbridgeEnergyPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=enb_JointFundingEasternAccessProjectArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=enb_MidcoastEnergyPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=enb_HoheSeeOffshoreWindProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=enb_BakkenPipelineSystemMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=enb_DakotaAccessPipelineProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=enb_EnergyTransferCrudeOilPipelineProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |