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DEBT - Schedule of Long-Term Debt Repayments (Details) $ in Millions, $ in Millions | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 CAD ($) | Dec. 31, 2021 USD ($) | Oct. 31, 2021 | Jun. 30, 2021 | May 31, 2021 | Mar. 31, 2021 | Feb. 28, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt | $ 1,100 | $ 914 |  |  |  |  |
Enbridge Energy Partners, L.P. | 4.20% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt |  | $ 600 |  |  |  |  |
Interest rate (percent) |  |  |  | 420.00% |  |  |
Enbridge Gas Inc. | 2.76% medium-term notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt | 200 |  |  |  |  |  |
Interest rate (percent) |  |  |  |  | 276.00% |  |
Enbridge Gas Inc. | 4.77% medium-term notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt | $ 175 |  |  |  |  |  |
Interest rate (percent) | 477.00% | 477.00% |  |  |  |  |
Enbridge Pipelines (Southern Lights) L.L.C. | 3.98% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt |  | $ 64 |  |  |  |  |
Interest rate (percent) | 398.00% | 398.00% |  | 398.00% |  |  |
Enbridge Southern Lights LP | 4.01% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt | $ 16 |  |  |  |  |  |
Interest rate (percent) | 401.00% | 401.00% |  | 401.00% |  |  |
Spectra Energy Partners, LP | 4.60% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt |  | $ 250 |  |  |  |  |
Westcoast Energy Inc. | 3.88% medium-term notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt | $ 150 |  |  |  |  |  |
Interest rate (percent) |  |  | 388.00% |  |  |  |
Enbridge Inc. | 4.26% medium-term notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt | 200 |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  |  | 426.00%
Enbridge Inc. | 3.16% medium-term notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Extinguishment of debt | $ 400 |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  | 316.00% |
Spectra Energy Partners, LP | 4.60% senior notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  | 460.00% |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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