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DEBT - Long Term Debt Repayments (Details) $ in Millions, $ in Millions | 1 Months Ended
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Sep. 30, 2019 CAD ($) | Jul. 31, 2019 CAD ($) | Jun. 30, 2019 USD ($) | May 31, 2019 CAD ($) | Mar. 31, 2019 USD ($) | Feb. 28, 2019 CAD ($) | Feb. 28, 2019 USD ($) | Jan. 31, 2019 CAD ($)
Enbridge Energy Partners, L.P. | 8.05% fixed/floating rate junior subordinated notes due 2067 |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  |  |  |  | $ 400 |
Interest rate (as a percent) |  |  |  |  |  | 8.05% | 8.05% |
Enbridge Energy Partners, L.P. | 9.88% senior notes |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  |  | $ 500 |  |  |
Interest rate (as a percent) |  |  |  |  | 9.88% |  |  |
Enbridge Pipelines (Southern Lights) L.L.C. | 3.98% medium-term notes due 2040 |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  | $ 23 |  |  |  |  |
Interest rate (as a percent) |  |  | 3.98% |  |  |  |  |
Enbridge Southern Lights LP | 4.01% senior notes due 2040 |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  | $ 10 |  |  |  |  |  |
Interest rate (as a percent) |  | 4.01% |  |  |  |  |  |
Westcoast Energy Inc. | 5.60% medium-term notes |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  |  |  |  |  | $ 250
Interest rate (as a percent) |  |  |  |  |  |  |  | 5.60%
Westcoast Energy Inc. | 5.60% medium-term notes |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  |  |  |  |  | $ 50
Interest rate (as a percent) |  |  |  |  |  |  |  | 5.60%
Westcoast Energy Inc. | 6.90% senior secured notes due 2019 |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 13 |  |  |  |
Interest rate (as a percent) |  |  |  | 6.90% |  |  |  |
Westcoast Energy Inc. | 4.34% senior secured notes due 2019 |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 2 |  |  |  |
Interest rate (as a percent) |  |  |  | 4.34% |  |  |  |
Enbridge Inc. | 4.10% medium-term notes |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  |  |  | $ 300 |  |
Interest rate (as a percent) |  |  |  |  |  | 4.10% | 4.10% |
Enbridge Inc. | Floating rate notes |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 750 |  |  |  |
Enbridge Inc. | 4.77% medium-term notes |  |  |  |  |  |  |  |
DEBT |  |  |  |  |  |  |  |
Principal Amount | $ 400 |  |  |  |  |  |  |
Interest rate (as a percent) | 4.77% |  |  |  |  |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: 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=6877327&loc=d3e13212-122682 + Details
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