DEBT (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Debt

	Weighted Average
December 31,	Interest Rate		Maturity	2017		2016
(millions of Canadian dollars)
Enbridge Inc.
United States dollar term notes1	4.1	%	2022-2046	5,889		4,968
Medium-term notes	4.4	%	2019-2064	5,698		4,498
Fixed-to-floating subordinated term notes2,3	5.6	%	2077	3,843		1,007
Floating rate notes4			2019-2020	2,254		1,171
Commercial paper and credit facility draws5	2.3	%	2019-2022	2,729		4,672
Other6				3		4
Enbridge (U.S.) Inc.
Medium-term notes7				—		14
Commercial paper and credit facility draws8	2.1	%	2019	490		126
Enbridge Energy Partners, L.P.
Senior notes9	6.2	%	2018-2045	6,328		6,781
Junior subordinated notes10			2067	501		537
Commercial paper and credit facility draws11	2.3	%	2019-2022	1,820		2,226
Enbridge Gas Distribution Inc.
Medium-term notes	4.5	%	2020-2050	3,695		3,904
Debentures	9.9	%	2024	85		85
Commercial paper and credit facility draws	1.4	%	2019	960		351
Enbridge Income Fund
Medium-term notes	4.3	%	2018-2044	1,750		2,075
Commercial paper and credit facility draws	2.9	%	2020	755		225
Enbridge Pipelines (Southern Lights) L.L.C.
Senior notes12	4.0	%	2040	1,207		1,342
Enbridge Pipelines Inc.
Medium-term notes13	4.5	%	2018-2046	4,525		4,525
Debentures	8.2	%	2024	200		200
Commercial paper and credit facility draws14	1.5	%	2019	1,438		1,032
Other6				4		4
Enbridge Southern Lights LP
Senior notes	4.0	%	2040	315		323
Midcoast Energy Partners, L.P.
Senior notes15	4.1	%	2019-2024	501		537
Commercial paper and credit facility draws16				—		564
Spectra Energy Capital17
Senior notes18	5.3	%	2018-2038	1,665		—
Spectra Energy Partners, LP17
Senior secured notes19	6.1	%	2020	138		—
Senior notes20	2.7	%	2018-2045	7,192		—
Floating rate notes21			2020	501		—
Commercial paper and credit facility draws22	2.0	%	2022	2,824		—
Union Gas Limited17
Medium-term notes	4.2	%	2018-2047	3,490		—
Senior debentures	8.7	%	2018	75		—
Debentures	8.7	%	2018-2025	250		—
Commercial paper and credit facility draws	1.3	%	2021	485		—
Westcoast Energy Inc.17
Senior secured notes	6.4	%	2019	66		—
Medium-term notes	4.7	%	2019-2041	2,177		—
Debentures	8.6	%	2018-2026	525		—
Fair value adjustment - Spectra Energy acquisition				1,114		—
Other23				(312	)	(226	)
Total debt				65,180		40,945
Current maturities				(2,871	)	(4,100	)
Short-term borrowings24				(1,444	)	(351	)
Long-term debt				60,865		36,494

1 2017 - US$4,700 million; 2016 - US$3,700 million.

2 2017 - $1,650 million and US$1,750 million; 2016 - US$750 million. For the initial 10 years, the notes carry a fixed interest rate. Subsequently, the interest rate will be floating and set to equal the three-month Bankers' Acceptance Rate or London Interbank Offered Rate (LIBOR) plus a margin.

3 The notes would be converted automatically into Conversion Preference Shares in the event of bankruptcy and related events.

4 2017 - $750 million and US$1,200 million; 2016 - $500 million and US$500 million. Carries an interest rate equal to the three-month Bankers' Acceptance Rate plus a margin of 59 basis points or LIBOR plus a margin of 40 or 70 basis points.

5 2017 - $1,593 million and US$907 million; 2016 - $3,600 million and US$799 million.

6 Primarily capital lease obligations.

7 2016 - US$10 million.

8 2017 - US$391 million; 2016 - US$94 million.

9 2017 - US$5,050 million; 2016 - US$5,050 million.

10 2017 - US$400 million; 2016 - US$400 million. Carries an interest rate equal to the three-month LIBOR plus a margin of 379.75 basis points.

11 2017 - US$1,453 million; 2016 - US$1,658 million.

12 2017 - US$963 million; 2016 - US$1,000 million.

13 Included in medium-term notes is $100 million with a maturity date of 2112.

14 2017 - $1,080 million and US$286 million; 2016 - $750 million and US$210 million.

15 2017 - US$400 million; 2016 - US$400 million.

16 2016 - US$420 million.

17 Debt acquired on February 27, 2017 in conjunction with the Merger Transaction (Note 7).

18 2017 - US$1,329 million.

19 2017 - US$110 million.

20 2017 - US$5,740 million.

21 2017 - US$400 million. Carries an interest rate equal to the three-month LIBOR plus a margin of 70 basis points.

22 2017 - US$2,254 million.

23 Primarily debt discount and debt issue costs.

24 Weighted average interest rate - 1.4%; 2016 - 0.8%.

Schedule of Committed Credit Facilities

The following table provides details of our committed credit facilities at December 31, 2017:

		2017
		Total
December 31,	Maturity	Facilities	Draws1	Available
(millions of Canadian dollars)
Enbridge Inc.2	2019-2022	7,353	2,737	4,616
Enbridge (U.S.) Inc.	2019	3,590	490	3,100
Enbridge Energy Partners, L.P.3	2019-2022	3,289	1,820	1,469
Enbridge Gas Distribution Inc.	2019	1,016	972	44
Enbridge Income Fund	2020	1,500	766	734
Enbridge Pipelines (Southern Lights) L.L.C.	2019	25	—	25
Enbridge Pipelines Inc.	2019	3,000	1,438	1,562
Enbridge Southern Lights LP	2019	5	—	5
Spectra Energy Partners, LP4,5	2022	3,133	2,824	309
Union Gas Limited5	2021	700	485	215
Westcoast Energy Inc.5	2021	400	—	400
Total committed credit facilities		24,011	11,532	12,479

1 Includes facility draws, letters of credit and commercial paper issuances that are back-stopped by the credit facility.

2 Includes $135 million, $157 million (US$125 million) and $150 million of commitments that expire in 2018, 2018 and 2020, respectively.

3 Includes $219 million (US$175 million) and $232 million (US$185 million) of commitments that expire in 2018 and 2020, respectively.

4 Includes $421 million (US$336 million) of commitments that expire in 2021.

5 Committed credit facilities acquired on February 27, 2017 in conjunction with the Merger Transaction (Note 7).

Schedule of Long-term Debt Issuances

The following are long-term debt issuances made during 2017 and 2016:

Company	Issue Date		Principal Amount
(millions of Canadian dollars unless otherwise stated)
Enbridge Inc.
	May 2017	Floating rate notes due May 20191	750
	June 2017	3.19% medium-term notes due December 2022	450
	June 2017	3.20% medium-term notes due June 2027	450
	June 2017	4.57% medium-term notes due March 2044	300
	June 2017	Floating rate notes due June 20202	US$500
	July 2017	2.90% senior notes due July 2022	US$700
	July 2017	3.70% senior notes due July 2027	US$700
	July 2017	Fixed-to-floating rate subordinated notes due July 20773	US$1,000
	September 2017	Fixed-to-floating rate subordinated notes due September 20774	1,000
	October 2017	Fixed-to-floating rate subordinated notes due September 20774	650
	October 2017	Floating rate notes due January 20205	US$700
	November 2016	4.25% medium-term notes due December 2026	US$750
	November 2016	5.50% medium-term notes due December 2046	US$750
	December 2016	Fixed-to-floating rate subordinated notes due January 20776	US$750
Enbridge Gas Distribution Inc.
	November 2017	3.51% medium-term notes due November 2047	300
	August 2016	2.50% medium-term notes due August 2026	300
Enbridge Pipelines Inc.
	August 2016	3.00% medium-term notes due August 2026	400
	August 2016	4.13% medium-term notes due August 2046	400
Spectra Energy Partners, LP
	June 2017	Floating rate notes due June 20207	US$400
Union Gas Limited
	November 2017	2.88% medium-term notes due November 2027	250
	November 2017	3.59% medium-term notes due November 2047	250

1 Carries an interest rate equal to the three-month Bankers' Acceptance Rate plus 59 basis points.

2 Carries an interest rate equal to the three-month LIBOR plus 70 basis points.

3 Matures in 60 years and are callable on or after year 10. For the initial 10 years, the notes carry a fixed interest rate of 5.5%. Subsequently, the interest rate will be set to equal the three-month LIBOR plus a margin of 342 basis points from year 10 to 30, and a margin of 417 basis points from year 30 to 60.

4 Matures in 60 years and are callable on or after year 10. For the initial 10 years, the notes carry a fixed interest rate of 5.4%. Subsequently, the interest rate will be set to equal the three-month Bankers' Acceptance Rate plus a margin of 325 basis points from year 10 to 30, and a margin of 400 basis points from year 30 to 60.

5 Carries an interest rate equal to the three-month LIBOR plus 40 basis points.

6 Matures in 60 years and are callable on or after year 10. For the initial 10 years, the notes carry a fixed interest rate of 6.0%. Subsequently, the interest rate will be set to equal the three-month LIBOR plus a margin of 389 basis points from year 10 to 30, and a margin of 464 basis points from year 30 to 60.

7 Carries an interest rate equal to the three-month LIBOR plus 70 basis points.

Schedule of Long-Term Debt Repayments

The following are long-term debt repayments during 2017 and 2016:

Company	Retirement/Repayment Date		Principal Amount
(millions of Canadian dollars unless otherwise stated)
Enbridge Inc.
	March 2017	Floating rate note	500
	April 2017	5.60% medium-term notes	US$400
	June 2017	Floating rate note	US$500
	May 2016	5.17% medium-term notes	400
	August 2016	5.00% medium-term notes	300
	October 2016	Floating rate note	US$350
Enbridge Energy Partners, L.P.
	December 2016	5.88% senior notes	US$300
Enbridge Gas Distribution Inc.
	April 2017	1.85% medium-term notes	300
	December 2017	5.16% medium-term notes	200
Enbridge Income Fund
	June 2017	5.00% medium-term notes	100
	December 2017	2.92% medium-term notes	225
	November 2016	Floating rate note	330
Enbridge Pipelines (Southern Lights) L.L.C.
	June and December 2017	3.98% medium-term note due June 2040	US$37
	June and December 2016	3.98% medium-term note due June 2040	US$30
Enbridge Southern Lights LP
	June 2017	4.01% medium-term note due June 2040	7
	June and December 2016	4.01% medium-term note due June 2040	14
Spectra Energy Capitals, LLC
	July and September 20171,3	8.00% senior notes due 2019	US$500
	July 20172,3	Senior notes carrying interest ranging from 3.3% to 7.5% due 2018 to 2038	US$761
Spectra Energy Partners, LP
	September 2017	6.00% senior notes	US$400
	June and December 2017	7.39% subordinated secured notes	US$12
Union Gas Limited
	November 2017	9.70% debentures	125
Westcoast Energy Inc.
	May and November 2017	6.90% senior secured notes	26
	May and November 2017	4.34% senior secured notes	24

1 On July 7, 2017 and September 8, 2017, Enbridge and Spectra Energy Capital, LLC (Spectra Capital) completed a cash tender offer for and follow-up redemption of Spectra Capital’s outstanding 8.0% senior unsecured notes due 2019. The aggregate principal amount tendered and redeemed was US$500 million. Spectra Capital paid the consenting note holders an aggregate cash consideration of US$581 million.

2 On July 13, 2017, pursuant to a cash tender offer, Spectra Capital purchased a portion of the principal amount of its outstanding senior unsecured notes carrying interest rates ranging from 3.3% to 7.5%, with maturities ranging from one to 21 years. The principal amount tendered and accepted was US$761 million. Spectra Capital paid the consenting note holders an aggregate cash consideration of US$857 million.

3 The loss on debt extinguishment of $50 million (US$38 million), net of the fair value adjustment recorded upon completion of the Merger Transaction, was reported within Interest expense in the Consolidated Statements of Earnings.

Schedule of Interest Expense

INTEREST EXPENSE

Year ended December 31,	2017		2016		2015
(millions of Canadian dollars)
Debentures and term notes	3,011		1,714		1,805
Commercial paper and credit facility draws	206		197		172
Amortization of fair value adjustment - Spectra Energy acquisition	(270	)	—		—
Capitalized	(391	)	(321	)	(353	)
	2,556		1,590		1,624