XML 136 R102.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

LONG-TERM INVESTMENTS - Narrative (Details) - CAD ($) shares in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Goodwill of investee |  | $ 2,200 | $ 2,100 | $ 2,200 |
Amortizable assets of investee |  | $ 706 | 681 | 706 |
Dividends received from equity investments |  |  | $ 2,200 | $ 2,800 | $ 1,400
Common Shares | Noverco |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Reciprocal shareholding (as a percent) |  | 1.40% | 0.50% | 1.40% |
Equity Method Investment, number of shares sold (in shares) | 11.6 | 4.4 |  |  |
Indirect pro-rata interest (as a percent) |  | 0.50% | 0.20% | 0.50% |
Reduction from reciprocal shareholding |  |  | $ 51 | $ 88 |
Preference shares | Noverco |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Maturity period |  |  | 10 years |  |
Margin (as a percent) |  |  | 4.38% |  |
Gas Distribution and Storage | Common Shares | Noverco |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership interest (as a percent) |  | 38.90% | 38.90% | 38.90% |

X
- Definition Represents the percentage points added to the variable reference rate for the calculation of cumulative dividends. + References No definition available. + Details
Name: | enb_CumulativeDividendsSpreadOverVariableReferenceRate
Namespace Prefix: | enb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents disclosure of the amount of dividends received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities. + References No definition available. + Details
Name: | enb_EquityMethodInvestmentDividends
Namespace Prefix: | enb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Equity Method Investment, Number of Shares Sold + References No definition available. + Details
Name: | enb_EquityMethodInvestmentNumberofSharesSold
Namespace Prefix: | enb_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the ownership interest of equity investee in the entity. + References No definition available. + Details
Name: | enb_EquityMethodInvestmentOwnershipInterestHeldByEquityInvesteeInEntity
Namespace Prefix: | enb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This element represents the unamortized excess of purchase price over underlying net book value of investee's assets at the purchase date recorded as unamortized assets. + References No definition available. + Details
Name: | enb_EquityMethodInvestmentUnamortizedExcessPurchasePriceOverNetBookValueAmortizableAssets
Namespace Prefix: | enb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This element represents the unamortized excess of purchase price over underlying net book value of the investee's assets at the purchase date recorded as goodwill. + References No definition available. + Details
Name: | enb_EquityMethodInvestmentUnamortizedExcessPurchasePriceOverNetBookValueGoodwill
Namespace Prefix: | enb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the indirect pro-rata interest of the entity in its own shares. + References No definition available. + Details
Name: | enb_IndirectProRataInterestOfEntityInItsOwnShares
Namespace Prefix: | enb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the maturity period of the Government of Canada bond. + References No definition available. + Details
Name: | enb_PreferredStockQuarterlyFloatingRateCumulativeDividendCalculationMaturityPeriodofGovernmentofCanadaBond
Namespace Prefix: | enb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the reduction in equity investment and shareholder's equity due to reciprocal investment. + References No definition available. + Details
Name: | enb_ReductionInEquityInvestmentAndShareholdingsDueToReciprocalInvestment
Namespace Prefix: | enb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=enb_NovercoIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=enb_GasDistributionandStorageSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=enb_NovercoIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |