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REVENUE (Tables)
 12 Months Ended
Dec. 31, 2023
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
Major Products and Services
Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power GenerationEnergy ServicesEliminations and OtherConsolidated
Year ended December 31, 2023
(millions of Canadian dollars)       
Transportation revenue11,875 5,302 814 — — — 17,991 
Storage and other revenue257 461 355 — — — 1,073 
Gas distribution revenue— — 4,859 — — — 4,859 
Electricity and transmission revenue— — — 259 — — 259 
Commodity sales— 17 — — — — 17 
Total revenue from contracts with customers
12,132 5,780 6,028 259 — — 24,199 
Commodity sales— — — — 18,964 — 18,964 
Other revenue1,2
257 72 (58)215 — — 486 
Intersegment revenue474 2 6 3 25 (510)— 
Total revenue12,863 5,854 5,976 477 18,989 (510)43,649 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power GenerationEnergy ServicesEliminations and OtherConsolidated
Year ended December 31, 2022
(millions of Canadian dollars)       
Transportation revenue11,283 5,012 782 — — — 17,077 
Storage and other revenue235 350 308 — — — 893 
Gas gathering and processing revenue
— 22 — — — — 22 
Gas distribution revenue— — 5,643 — — — 5,643 
Electricity and transmission revenue— — — 281 — — 281 
Total revenue from contracts with customers
11,518 5,384 6,733 281 — — 23,916 
Commodity sales— — — — 29,150 — 29,150 
Other revenue1,2
(81)39 (20)305 — — 243 
Intersegment revenue615 3 16 (4)25 (655)— 
Total revenue12,052 5,426 6,729 582 29,175 (655)53,309 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power GenerationEnergy ServicesEliminations and OtherConsolidated
Year ended December 31, 2021
(millions of Canadian dollars)       
Transportation revenue9,492 4,364 676 — — — 14,532 
Storage and other revenue147 255 246 — — — 648 
Gas gathering and processing revenue
— 49 — — — — 49 
Gas distribution revenue— — 4,026 — — — 4,026 
Electricity and transmission revenue
— — — 177 — — 177 
Total revenue from contracts with customers
9,639 4,668 4,948 177 — — 19,432 
Commodity sales— — — — 26,873 — 26,873 
Other revenue1,2
375 42 13 336 — — 766 
Intersegment revenue567 1 19 (1)44 (630)— 
Total revenue10,581 4,711 4,980 512 26,917 (630)47,071 
1Includes realized and unrealized gains and losses from our hedging program which for the year ended December 31, 2023 were a net of $97 million loss (2022 - $431 million loss; 2021 - $59 million gain).
2Includes revenues from lease contracts. Refer to Note 26 - Leases.
Schedule of Contract Balances
Contract ReceivablesContract AssetsContract Liabilities
(millions of Canadian dollars)
Balance as at December 31, 20232,802 400 2,591 
Balance as at December 31, 20223,183 230 2,241 
Schedule of Performance Obligations
Performance Obligations
SegmentNature of Performance Obligation
Liquids Pipelines
•Transportation and storage of crude oil and natural gas liquids (NGL)
Gas Transmission and Midstream
•Transportation, storage, gathering, compression and treating of natural gas
•Transportation of NGL
•Sale of crude oil, natural gas and NGL
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 PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power GenerationConsolidated
Year ended December 31, 2023
(millions of Canadian dollars)    
Revenue from products transferred at a point in time— 17 138 — 155 
Revenue from products and services transferred over time1
12,132 5,763 5,890 259 24,044 
Total revenue from contracts with customers
12,132 5,780 6,028 259 24,199 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power GenerationConsolidated
Year ended December 31, 2022
(millions of Canadian dollars)    
Revenue from products transferred at a point in time— — 127 — 127 
Revenue from products and services transferred over time1
11,518 5,384 6,606 281 23,789 
Total revenue from contracts with customers
11,518 5,384 6,733 281 23,916 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power GenerationConsolidated
Year ended December 31, 2021
(millions of Canadian dollars)    
Revenue from products transferred at a point in time— — 70 — 70 
Revenue from products and services transferred over time1
9,639 4,668 4,878 177 19,362 
Total revenue from contracts with customers
9,639 4,668 4,948 177 19,432 
1Revenue 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.