REVENUE (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Major Products and Services

	Liquids Pipelines	Gas Transmission and Midstream	Gas Distribution and Storage	Renewable Power Generation	Energy Services		Eliminations and Other		Consolidated
Year ended December 31, 2019
(millions of Canadian dollars)
Transportation revenue	9,082	4,477	743	—	—		—		14,302
Storage and other revenue	109	268	201	—	—		—		578
Gas gathering and processing revenue	—	423	—	—	—		—		423
Gas distribution revenue	—	—	4,210	—	—		—		4,210
Electricity and transmission revenue	—	—	—	180	—		—		180
Commodity sales	—	4	—	—	—		—		4
Total revenue from contracts with customers	9,191	5,172	5,154	180	—		—		19,697
Commodity sales	—	—	—	—	29,305		—		29,305
Other revenue1,2	659	30	9	387	(2	)	(16	)	1,067
Intersegment revenue	369	5	16	—	71		(461	)	—
Total revenue	10,219	5,207	5,179	567	29,374		(477	)	50,069

	Liquids Pipelines		Gas Transmission and Midstream	Gas Distribution and Storage	Renewable Power Generation	Energy Services	Eliminations and Other		Consolidated
Year ended December 31, 2018
(millions of Canadian dollars)
Transportation revenue	8,488		3,928	875	—	—	—		13,291
Storage and other revenue	101		222	196	—	—	—		519
Gas gathering and processing revenue	—		815	—	—	—	—		815
Gas distribution revenue	—		—	4,376	—	—	—		4,376
Electricity and transmission revenue	—		—	—	206	—	—		206
Commodity sales	—		1,590	—	—	—	—		1,590
Total revenue from contracts with customers	8,589		6,555	5,447	206	—	—		20,797
Commodity sales	—		—	—	—	26,070	—		26,070
Other revenue1,2	(894	)	6	9	361	4	25		(489	)
Intersegment revenue	384		10	14	—	154	(562	)	—
Total revenue	8,079		6,571	5,470	567	26,228	(537	)	46,378

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

2 

Includes revenues from lease contracts. Refer to Note 27 Leases.

Contract with Customer, Asset and Liability

	Contract Receivables	Contract Assets	Contract Liabilities
(millions of Canadian dollars)
Balance as at December 31, 2018	1,929	191	1,297
Balance as at December 31, 2019	2,099	216	1,424

Performance Obligations

Performance Obligations

Segment	Nature of Performance Obligation
Liquids Pipelines	• Transportation and storage of crude oil and NGLs
Gas Transmission and Midstream	• Transportation, storage, gathering, compression and treating of natural gas
	• Transportation of NGLs
	• Sale of crude oil, natural gas and NGLs
Gas Distribution and Storage	• Supply and delivery of natural gas
	• Transportation of natural gas
	• Storage of natural gas
Renewable Power Generation	• Generation and transmission of electricity
	• Delivery of electricity from renewable energy generation facilities

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

Recognition and Measurement of Revenue

	Liquids Pipelines	Gas Transmission and Midstream	Gas Distribution and Storage	Renewable Power Generation	Energy Services	Consolidated
Year ended December 31, 2019
(millions of Canadian dollars)
Revenue from products transferred at a point in time	—	4	65	—	—	69
Revenue from products and services transferred over time1	9,191	5,168	5,089	180	—	19,628
Total revenue from contracts with customers	9,191	5,172	5,154	180	—	19,697

1  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.

	Liquids Pipelines	Gas Transmission and Midstream	Gas Distribution and Storage	Renewable Power Generation	Energy Services	Consolidated
Year ended December 31, 2018
(millions of Canadian dollars)
Revenue from products transferred at a point in time1	—	1,590	68	—	—	1,658
Revenue from products and services transferred over time2	8,589	4,965	5,379	206	—	19,139
Total revenue from contracts with customers	8,589	6,555	5,447	206	—	20,797

1  Revenue from sales of crude oil, natural gas and NGLs. Revenue from commodity sales where the commodity sold is not immediately consumed prior to use is recognized at the point in time when the contractually specified volume of the commodity has been delivered.

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.