XML 96 R85.htm IDEA: XBRL DOCUMENT
v3.19.1

REGULATORY MATTERS - Union Gas Limited (Narrative) (Details) - Union Gas Limited | 12 Months Ended
--- | ---
Dec. 31, 2018
Public Utilities, General Disclosures [Line Items] |
Term of incentive regulation framework | 5 years
Return on common equity (as a percent) | 8.93%
Fully retained |
Public Utilities, General Disclosures [Line Items] |
Return on common equity (as a percent) | 9.93%
50% of any earnings |
Public Utilities, General Disclosures [Line Items] |
Earnings allowed to be retained under earnings sharing mechanism (as a percent) | 50.00%
50% of any earnings | Minimum |
Public Utilities, General Disclosures [Line Items] |
Return on common equity (as a percent) | 9.93%
50% of any earnings | Maximum |
Public Utilities, General Disclosures [Line Items] |
Return on common equity (as a percent) | 10.93%
90% of any earnings |
Public Utilities, General Disclosures [Line Items] |
Return on common equity (as a percent) | 10.93%
Earnings allowed to be retained under earnings sharing mechanism (as a percent) | 90.00%

X
- Definition Public Utilities, Earnings Sharing Mechanism, Share Of Earnings, Percentage + References No definition available. + Details
Name: | enb_PublicUtilitiesEarningsSharingMechanismShareOfEarningsPercentage
Namespace Prefix: | enb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Incentive Regulation Term + References No definition available. + Details
Name: | enb_PublicUtilitiesIncentiveRegulationTerm
Namespace Prefix: | enb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of public utility's approved return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | enb_PublicUtilitiesEarningsSharingMechanismAxis=enb_EarningsFullyRetainedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | enb_PublicUtilitiesEarningsSharingMechanismAxis=enb_A50OfEarningsRetainedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | enb_PublicUtilitiesEarningsSharingMechanismAxis=enb_A90OfEarningsRetainedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |