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DEBT (Tables) | 3 Months Ended
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Mar. 31, 2018
Debt Disclosure [Abstract] |
Schedule of credit facilities | The following table provides details of our committed credit facilities at March 31, 2018:
|  | March 31, 2018
| Maturity | Total Facilities |  | Draws 1 |  | Available |
(millions of Canadian dollars) |  |  |  |
Enbridge Inc.2 | 2019-2022 | 6,644 |  | 2,616 |  | 4,028 |
Enbridge (U.S.) Inc. | 2019 | 2,469 |  | 1,142 |  | 1,327 |
Enbridge Energy Partners, L.P.3 | 2019-2022 | 3,385 |  | 1,660 |  | 1,725 |
Enbridge Gas Distribution Inc. (EGD) | 2019 | 1,017 |  | 884 |  | 133 |
Enbridge Income Fund | 2020 | 1,500 |  | 566 |  | 934 |
Enbridge Pipelines Inc. | 2019 | 3,000 |  | 1,730 |  | 1,270 |
Spectra Energy Partners, LP 4 | 2022 | 3,223 |  | 2,135 |  | 1,088 |
Union Gas Limited (Union Gas) | 2021 | 700 |  | 130 |  | 570 |
Total committed credit facilities |  | 21,938 |  | 10,863 |  | 11,075 |
1 | Includes facility draws, letters of credit and commercial paper issuances that are back-stopped by the credit facility.
2 | Includes $135 million, $161 million (US$125 million) and $150 million of commitments that expire in 2018, 2018 and 2020, respectively.
3 | Includes $226 million (US$175 million) and $239 million (US$185 million) of commitments that expire in 2018 and 2020, respectively.
4 | Includes $434 million (US$336 million) of commitments that expire in 2021.
Schedule of Long-term Debt Instruments | During the first quarter of 2018, we completed the following long-term debt issuances:
Company | Issue Date |  |  | Principal Amount
(millions of dollars) |  |
Enbridge Inc. |  |  |
| March 2018 | Fixed-to-floating rate notes due 2078 1 | US$850
Spectra Energy Partners, LP 2 |  |  |
| January 2018 | 3.50% senior notes due 2028 | US$400
| January 2018 | 4.15% senior notes due 2048 | US$400
1 | Notes mature in 60 years and are callable on or after year 10. For the initial 10 years, the notes carry a fixed interest rate of 6.25%. Subsequently, the interest rate will be set to equal the three-month London Interbank Offered Rate (LIBOR) plus a margin of 364 basis points from years 10 to 30, and a margin of 439 basis points from years 30 to 60.
2 | Issued through Texas Eastern Transmission, LP, a wholly-owned operating subsidiary of Spectra Energy Partners, LP (SEP).
Schedule of Repayment of Debt | During the first quarter of 2018, we completed the following long-term debt repayments:
Company | Retirement/Repayment Date |  |  | Principal Amount |  | Cash Consideration
(millions of Canadian dollars unless otherwise stated) |  |  |
Enbridge Southern Lights LP |  |  |  |
| January 2018 | 4.01% medium-term notes due June 2040 | 9 |  |
Spectra Energy Capital, LLC 1 |  |  |  |
Repurchase via Tender Offer |  |  |  |
| March 2018 | 6.75% senior unsecured notes due 2032 | US$64 | US$80
| March 2018 | 7.50% senior unsecured notes due 2038 | US$43 | US$59
Redemption |  |  |
| March 2018 | 5.65% senior unsecured notes due 2020 | US$163 | US$172
| March 2018 | 3.30% senior unsecured notes due 2023 | US$498 | US$508
1 | The loss on debt extinguishment of $37 million (US$29 million), net of the fair value adjustment recorded upon completion of the stock-for-stock merger transaction on February 27, 2017 between Enbridge and Spectra Energy Corp (the Merger Transaction), was reported within Interest expense in the Consolidated Statements of Earnings.

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