REVENUE (Tables)

12 Months Ended

Dec. 31, 2020

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, 2020
(millions of Canadian dollars)
Transportation revenue	9,161	4,523	674	—	—	—	14,358
Storage and other revenue	94	274	203	—	—	—	571
Gas gathering and processing revenue	—	27	—	—	—	—	27
Gas distribution revenue	—	—	3,663	—	—	—	3,663
Electricity and transmission revenue	—	—	—	198	—	—	198
Total revenue from contracts with customers	9,255	4,824	4,540	198	—	—	18,817
Commodity sales	—	—	—	—	19,259	—	19,259
Other revenue1,2	584	44	17	389	—	(23)	1,011
Intersegment revenue	584	2	12	—	24	(622)	—
Total revenue	10,423	4,870	4,569	587	19,283	(645)	39,087

	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	(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 for the year ended December 31, 2020 of $265 million gain, (2019 - $346 million gain, 2018 - $1.1 billion loss).

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, 2020	2,042	226	1,815
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 natural gas liquids (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	Consolidated
Year ended December 31, 2020
(millions of Canadian dollars)
Revenue from products transferred at a point in time	—	—	60	—	60
Revenue from products and services transferred over time2	9,255	4,824	4,480	198	18,757
Total revenue from contracts with customers	9,255	4,824	4,540	198	18,817

	Liquids Pipelines	Gas Transmission and Midstream	Gas Distribution and Storage	Renewable Power Generation	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 time2	9,191	5,168	5,089	180	19,628
Total revenue from contracts with customers	9,191	5,172	5,154	180	19,697

	Liquids Pipelines	Gas Transmission and Midstream	Gas Distribution and Storage	Renewable Power Generation	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.