LONG-TERM INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2017

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Long-Term Investments

	Ownership
December 31,	Interest		2017	2016
(millions of Canadian dollars)
EQUITY INVESTMENTS
Liquids Pipelines
Bakken Pipeline System1	27.6	%	1,938	—
Eddystone Rail Company, LLC	100.0	%	—	19
Seaway Crude Pipeline System	50.0	%	2,882	3,129
Illinois Extension Pipeline Company, L.L.C.2	65.0	%	686	759
Other	30.0% - 43.8%		87	70
Gas Transmission and Midstream
Alliance Pipeline3	50.0	%	375	411
Aux Sable	42.7% - 50.0%		300	324
DCP Midstream, LLC4	50.0	%	2,143	—
Gulfstream Natural Gas System, L.L.C.4	50.0	%	1,205	—
Nexus Gas Transmission, LLC4	50.0	%	834	—
Offshore - various joint ventures	22.0% - 74.3%		389	435
PennEast Pipeline Company LLC4	20.0	%	69	—
Sabal Trail Transmission, LLC5	50.0	%	2,355	—
Southeast Supply Header L.L.C.4	50.0	%	486	—
Steckman Ridge LP4	49.5	%	221	—
Texas Express Pipeline	35.0	%	430	484
Vector Pipeline L.P.	60.0	%	169	159
Other4	33.3% - 50.0%		34	4
Gas Distribution
Noverco Common Shares	38.9	%	—	—
Other4	50.0	%	15	—
Green Power and Transmission
Eolien Maritime France SAS6	50.0	%	69	58
Hohe See Offshore Wind Project7	50.0	%	763	—
Rampion Offshore Wind Project	24.9	%	555	345
Other	19.0% - 50.0%		95	100
Eliminations and Other
Other	19.0% - 42.7%		26	15
OTHER LONG-TERM INVESTMENTS
Gas Distribution
Noverco Preferred Shares			371	355
Green Power and Transmission
Emerging Technologies and Other			80	90
Eliminations and Other
Other			67	79
			16,644	6,836

1 On February 15, 2017, EEP acquired an effective 27.6% interest in the Dakota Access and Energy Transfer Crude Oil Pipelines (collectively, the Bakken Pipeline System) for a purchase price of $2 billion (US$1.5 billion). The Bakken Pipeline System was placed into service on June 1, 2017. For details regarding our funding arrangement, refer to Note 19 - Noncontrolling Interests.

2 Owns the Southern Access Extension Project.

3 Certain assets of the Alliance Pipeline are pledged as collateral to Alliance Pipeline lenders.

4 On February 27, 2017, we acquired Spectra Energy's interests in DCP Midstream, Gulfstream Natural Gas System, L.L.C, Nexus, PennEast, Southeast Supply Header L.L.C., Steckman Ridge LP and other equity investments as part of the Merger Transaction (Note 7).

5 On February 27, 2017, we acquired Spectra Energy's consolidated interest in Sabal Trail as part of the Merger Transaction (Note 7). On July 3, 2017, Sabal Trail was placed into service and the assets, liabilities, and noncontrolling interests were deconsolidated as at the in-service date.

6 On May 19, 2016, we acquired a 50% equity interest in Eolien Maritime France SAS.

7 On February 8, 2017, we acquired an effective 50% interest in EnBW Hohe See GmbH & Co. KG.

Summary of Combined Financial Information

Summarized combined financial information of our interest in unconsolidated equity investments (presented at 100%) is as follows:

	Year Ended December 31,
	2017			2016				2015
	Seaway	Other	Total	Seaway	Other		Total	Seaway	Other	Total
(millions of Canadian dollars)
Operating revenues	959	15,254	16,213	938	3,164		4,102	833	3,054	3,887
Operating expenses	286	12,911	13,197	293	3,051		3,344	263	2,210	2,473
Earnings	672	2,056	2,728	643	(2	)	641	566	512	1,078
Earnings attributable to controlling interests	336	926	1,262	322	147		469	283	207	490

	December 31, 2017			December 31, 2016
	Seaway	Other	Total	Seaway	Other	Total
(millions of Canadian dollars)
Current assets	106	3,432	3,538	86	842	928
Non-current assets	3,329	41,697	45,026	3,651	12,264	15,915
Current liabilities	143	3,311	3,454	172	831	1,003
Non-current liabilities	13	13,582	13,595	13	5,121	5,134
Noncontrolling interests	—	3,191	3,191	—	—	—