REVENUE (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

	Liquids Pipelines		Gas Transmission and Midstream		Gas Distribution	Green Power and Transmission	Energy Services	Eliminations and Other		Consolidated
Three months ended June 30, 2018
(millions of Canadian dollars)
Transportation revenue	2,079		958		151	—	—	—		3,188
Storage and other revenue	42		51		52	—	—	—		145
Gas gathering and processing revenue	—		231		—	—	—	—		231
Gas distribution revenue	—		—		856	—	—	—		856
Electricity and transmission revenue	—		—		—	148	—	—		148
Commodity sales	—		639		—	—	—	—		639
Total revenue from contracts with customers	2,121		1,879		1,059	148	—	—		5,207
Commodity sales	—		—		—	—	5,812	—		5,812
Other revenue1	(261	)	(17	)	9	1	—	(6	)	(274	)
Intersegment revenue	90		2		2	—	24	(118	)	—
Total revenue	1,950		1,864		1,070	149	5,836	(124	)	10,745

	Liquids Pipelines		Gas Transmission and Midstream	Gas Distribution	Green Power and Transmission	Energy Services	Eliminations and Other		Consolidated
Six months ended June 30, 2018
(millions of Canadian dollars)
Transportation revenue	4,137		1,910	390	—	—	—		6,437
Storage and other revenue	82		111	118	—	—	—		311
Gas gathering and processing revenue	—		436	—	—	—	—		436
Gas distribution revenue	—		—	2,782	—	—	—		2,782
Electricity and transmission revenue	—		—	—	302	—	—		302
Commodity sales	—		1,332	—	—	—	—		1,332
Total revenue from contracts with customers	4,219		3,789	3,290	302	—	—		11,600
Commodity sales	—		—	—	—	12,387	—		12,387
Other revenue1	(530	)	8	11	4	—	(9	)	(516	)
Intersegment revenue	170		4	6	—	81	(261	)	—
Total revenue	3,859		3,801	3,307	306	12,468	(270	)	23,471

1  Includes mark-to-market gains/(losses) from our hedging program.

Contract with Customer, Asset and Liability

	Receivables	Contract Assets	Contract Liabilities
(millions of Canadian dollars)
Balance as at January 1, 2018	2,475	290	992
Balance as at June 30, 2018	2,086	295	1,097

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The below table presents the cumulative, immaterial effect of the adoption of ASC 606 on our Consolidated Statement of Financial Position as at January 1, 2018 on each affected financial statement line item along with explanations of those effects. For the three and six months ended June 30, 2018, the effect of the adoption of ASC 606 on our Consolidated Statement of Earnings wasnot material.

	Balance at December 31, 2017		Adjustments Due to ASC 606		Balance at January 1, 2018
(millions of Canadian dollars)
Assets
Deferred amounts and other assets	6,442		(170	)	6,272
Property, plant and equipment, net	90,711		112		90,823
Liabilities and equity
Accounts payable and other	9,478		62		9,540
Other long-term liabilities	7,510		66		7,576
Deferred income taxes	9,295		(62	)	9,233
Redeemable noncontrolling interests	4,067		(38	)	4,029
Deficit	(2,468	)	(86	)	(2,554	)

	Liquids Pipelines	Gas Transmission and Midstream	Gas Distribution	Green Power and Transmission	Energy Services	Consolidated
Three months ended June 30, 2018
(millions of Canadian dollars)
Revenue from products transferred at a point in time1	—	639	20	—	—	659
Revenue from products and services transferred over time2	2,121	1,240	1,039	148	—	4,548
Total revenue from contracts with customers	2,121	1,879	1,059	148	—	5,207

	Liquids Pipelines	Gas Transmission and Midstream	Gas Distribution	Green Power and Transmission	Energy Services	Consolidated
Six months ended June 30, 2018
(millions of Canadian dollars)
Revenue from products transferred at a point in time1	—	1,332	45	—	—	1,377
Revenue from products and services transferred over time2	4,219	2,457	3,245	302	—	10,223
Total revenue from contracts with customers	4,219	3,789	3,290	302	—	11,600

1 Revenue from sales of crude oil, natural gas and NGLs.

2 Revenue from crude oil and natural gas pipeline transportation, storage, natural gas gathering, compression and treating, natural gas distribution, natural gas storage services and electricity sales.