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REVENUES (Tables)
 9 Months Ended
Sep. 30, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue
Major Products and Services
Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Energy ServicesEliminations and OtherConsolidated
Three months ended
September 30, 2021
(millions of Canadian dollars)       
Transportation revenue2,340 1,081 128 — — — 3,549 
Storage and other revenue33 58 50 — — — 141 
Gas gathering and processing revenue— 15 — — — — 15 
Gas distribution revenue— — 496 — — — 496 
Electricity and transmission revenue— — — 44 — — 44 
Total revenue from contracts with customers
2,373 1,154 674 44 — — 4,245 
Commodity sales— — — — 7,279 — 7,279 
Other revenue1,2
(143)4 24 78 (1)(20)(58)
Intersegment revenue140 1 (11)— 12 (142)— 
Total revenue2,370 1,159 687 122 7,290 (162)11,466 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Energy ServicesEliminations and OtherConsolidated
Three months ended
September 30, 2020
(millions of Canadian dollars)       
Transportation revenue2,234 1,077 128 — — — 3,439 
Storage and other revenue22 64 51 — — — 137 
Gas gathering and processing revenue— 7 — — — — 7 
Gas distribution revenue— — 448 — — — 448 
Electricity and transmission revenue— — — 46 — — 46 
Total revenue from contracts with customers
2,256 1,148 627 46 — — 4,077 
Commodity sales— — — — 4,595 — 4,595 
Other revenue1,2
360 14 (8)80 (3)(5)438 
Intersegment revenue157 — 2 — 4 (163)— 
Total revenue2,773 1,162 621 126 4,596 (168)9,110 
Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Energy ServicesEliminations and OtherConsolidated
Nine months ended
September 30, 2021
(millions of Canadian dollars)       
Transportation revenue6,826 3,248 494 — — — 10,568 
Storage and other revenue96 195 159 — — — 450 
Gas gathering and processing revenue— 32 — — — — 32 
Gas distribution revenue— — 2,755 — — — 2,755 
Electricity and transmission revenue— — — 125 — — 125 
Total revenue from contracts with customers
6,922 3,475 3,408 125 — — 13,930 
Commodity sales— — — — 20,042 — 20,042 
Other revenue1,2
284 25 42 246 — (18)579 
Intersegment revenue410 1 13 — 26 (450)— 
Total revenue7,616 3,501 3,463 371 20,068 (468)34,551 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Energy ServicesEliminations and OtherConsolidated
Nine months ended
September 30, 2020
(millions of Canadian dollars)       
Transportation revenue6,815 3,458 494 — — — 10,767 
Storage and other revenue72 209 154 — — — 435 
Gas gathering and processing revenue— 19 — — — — 19 
Gas distribution revenue— — 2,551 — — — 2,551 
Electricity and transmission revenue— — — 150 — — 150 
Total revenue from contracts with customers
6,887 3,686 3,199 150 — — 13,922 
Commodity sales— — — — 14,920 — 14,920 
Other revenue1,2
(59)35 (1)279 1 (18)237 
Intersegment revenue424 1 8 — 22 (455)— 
Total revenue7,252 3,722 3,206 429 14,943 (473)29,079 
1 Includes mark-to-market gains/(losses) from our hedging program for the three months ended September 30, 2021 and 2020 of $225 million mark-to-market loss and $276 million mark-to-market gain, respectively. For the nine months ended September 30, 2021 and 2020, Other revenue includes a $36 million mark-to-market gain and $298 million mark-to-market loss, respectively.
2 Includes revenues from lease contracts for the three months ended September 30, 2021 and 2020 of $140 million and $144 million, respectively and for the nine months ended September 30, 2021 and 2020 of $442 million and $459 million, respectively.
Recognition and Measurement of Revenues
Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Consolidated
Three months ended
September 30, 2021
(millions of Canadian dollars)    
Revenues from products transferred at a point in time
— — 13 — 13 
Revenues from products and services transferred over time1
2,373 1,154 661 44 4,232 
Total revenue from contracts with customers
2,373 1,154 674 44 4,245 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Consolidated
Three months ended
September 30, 2020
(millions of Canadian dollars)
Revenues from products transferred at a point in time
— — 15 — 15 
Revenues from products and services transferred over time1
2,256 1,148 612 46 4,062 
Total revenue from contracts with customers
2,256 1,148 627 46 4,077 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Consolidated
Nine months ended
September 30, 2021
(millions of Canadian dollars)    
Revenues from products transferred at a point in time
— — 47 — 47 
Revenues from products and services transferred over time1
6,922 3,475 3,361 125 13,883 
Total revenue from contracts with customers
6,922 3,475 3,408 125 13,930 

Liquids PipelinesGas Transmission and MidstreamGas Distribution and StorageRenewable Power Generation Consolidated
Nine months ended
September 30, 2020
(millions of Canadian dollars)
Revenues from products transferred at a point in time
— — 45 — 45 
Revenues from products and services transferred over time1
6,887 3,686 3,154 150 13,877 
Total revenue from contracts with customers
6,887 3,686 3,199 150 13,922 
1     Includes revenues 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.
Contract with customer, asset and liability
Contract Balances
Contract ReceivablesContract AssetsContract Liabilities
(millions of Canadian dollars)
Balance as at September 30, 20211,673 212 1,842 
Balance as at December 31, 20202,042 226 1,815