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DEBT - Long Term Debt Issuance (Details) $ in Millions, $ in Millions | Jun. 30, 2021 USD ($) | Jun. 30, 2021 CAD ($) | May 31, 2021 CAD ($) | Feb. 28, 2021 USD ($)
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Principal Amount | $ 2,000 | $ 800 |  |
Floating rate notes due February 2023 | Enbridge Inc. |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal Amount |  |  |  | $ 500
2.50% Sustainability-Linked senior notes due August 2033 | Enbridge Inc. |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate (as a percent) | 2.50% | 2.50% |  |
Principal Amount | $ 1,000 |  |  |
3.40% senior notes due August 2051 | Enbridge Inc. |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate (as a percent) | 3.40% | 3.40% |  |
Principal Amount | $ 500 |  |  |
4.20% medium-term notes due May 2051 | Enbridge Pipelines Inc. |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate (as a percent) |  |  | 4.20% |
Principal Amount |  |  | $ 400 |
2.82% medium-term notes due May 2031 | Enbridge Pipelines Inc. |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate (as a percent) |  |  | 2.82% |
Principal Amount |  |  | $ 400 |

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