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DEBT - Narrative (Details) € in Millions, $ in Millions |  |  |  |  | 1 Months Ended | 9 Months Ended |  |  |
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Sep. 30, 2024 USD ($) | May 31, 2024 USD ($) | Mar. 06, 2024 USD ($) | Jan. 02, 2024 USD ($) | Oct. 31, 2024 CAD ($) | Jul. 31, 2024 CAD ($) | Jun. 30, 2024 USD ($) | Apr. 30, 2024 EUR (€) | Sep. 30, 2024 CAD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2024 EUR (€) | Sep. 30, 2024 USD ($) | Mar. 31, 2024 CAD ($) | Dec. 31, 2023 CAD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee percentage |  |  |  |  |  |  |  |  | 0.10% | 0.10% | 0.10% |  |  |
Long-term debt and lease obligation |  |  |  |  |  |  |  |  | $ 87,320,000,000 |  |  |  |  | $ 74,715,000,000
Increase (decrease) from cumulative fair value adjustments |  |  |  |  |  |  |  |  | $ 474,000,000 |  |  |  |  | 514,000,000
Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, increase |  |  |  |  | $ 200,000,000 |  |  |  |  |  |  |  |  |
Debt Instrument Interest Rate Terms Period One | Enbridge Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  |  |  |  | 5 years 6 months | 5 years 6 months | 5 years 6 months |  |  |
Spread on variable rate (in percent) |  |  |  |  |  |  |  |  | 3.12% | 3.12% | 3.12% |  |  |
Debt Instrument Interest Rate Terms Period Two | Enbridge Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  |  |  |  | 9 years 9 months | 9 years 9 months | 9 years 9 months |  |  |
Spread on variable rate (in percent) |  |  |  |  |  |  |  |  | 2.97% | 2.97% | 2.97% |  |  |
Long-Term Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 1,800,000,000 |  |  | $ 5,100 |  |
Principal amount |  |  |  |  |  |  |  | € 23 | 800,000,000 | $ 3,600 | € 23 |  |  |
EOG Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt increased |  |  | $ 1,900 |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) from cumulative fair value adjustments |  |  |  |  |  |  |  |  | (451,000,000) |  |  |  |  |
RNG Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt increased |  |  |  | $ 568 |  |  |  |  |  |  |  |  |  |
Questar Acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt increased |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) from cumulative fair value adjustments |  |  |  |  |  |  |  |  | (293,000,000) |  |  |  |  |
PSNC Acquisation |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt increased | $ 1,100 |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) from cumulative fair value adjustments |  |  |  |  |  |  |  |  | (156,000,000) |  |  |  |  |
Commercial paper and credit facility draws |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt and lease obligation |  |  |  |  |  |  |  |  | 6,800,000,000 |  |  |  |  | 3,800,000,000
Fixed-to-floating subordinated term notes | Subordinated term notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subordinated debt |  |  |  |  |  |  |  |  | 14,800,000,000 |  |  |  |  | 13,000,000,000.0
Committed credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 23,738,000,000 |  |  |  |  |
Term out option period (in years) |  |  |  |  |  |  |  |  | 1 year | 1 year | 1 year |  |  |
Unutilized amount of facility |  |  |  |  |  |  |  |  | $ 15,202,000,000 |  |  |  |  |
Committed credit facilities | Enbridge Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  | 8,835,000,000 |  |  |  |  |
Unutilized amount of facility |  |  |  |  |  |  |  |  | 4,842,000,000 |  |  |  |  |
Committed credit facilities | Enbridge Gas Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  | 2,500,000,000 |  |  |  |  |
Unutilized amount of facility |  |  |  |  |  |  |  |  | 1,570,000,000 |  |  |  |  |
Committed credit facilities | Enbridge Pipelines Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  | 2,000,000,000 |  |  |  |  |
Unutilized amount of facility |  |  |  |  |  |  |  |  | 905,000,000 |  |  |  |  |
Committed credit facilities | Term Loan Maturing In March 2049 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000 |
Committed credit facilities | 364-day extendible credit facility | Enbridge Gas Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  | 364 days |  |  |  |  |  |  |  |
Term out option period (in years) |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |
Committed credit facilities | 364-day extendible credit facility | Enbridge Pipelines Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  | 364 days |  |  |  |  |  |  |  |
Term out option period (in years) |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |
Uncommitted demand credit facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  | 1,300,000,000 |  |  |  |  | 1,100,000,000
Unutilized amount of facility |  |  |  |  |  |  |  |  | $ 859,000,000 |  |  |  |  | $ 572,000,000
Non-Revolving Term Loan Facility | Non-Revolving Term Loan Facility Maturing In June 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  | $ 250 |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |
Revolving credit facility | 364-day extendible credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | $ 8,800,000,000 |  |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  | 364 days |  |  |  |  |  |  |  |
Term out option period (in years) |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |
Revolving credit facility | Term Loan Maturing In July 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Revolving credit facility | Five Year Credit Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | $ 7,800,000,000 |  |  |  |  |  |  |  |
Debt instrument maturity period (in years) |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |

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