v3.26.3
REVENUE - Schedule of Major Products and Services (Details) - CAD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers $ 6,119 $ 6,132 $ 21,679 $ 21,420
Revenue not from contract with customers 0 0 0 0
Total revenue 21,077 14,639 72,752 48,017
Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 2,838 3,011 8,481 9,154
Gas Transmission        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 1,647 1,551 5,014 4,767
Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 1,550 1,498 7,946 7,333
Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 84 72 238 166
Transportation revenue        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 4,274 4,357 12,858 13,311
Storage and other revenue        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 368 354 1,158 1,141
Gas distribution sales        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 1,344 1,295 7,287 6,696
Electricity revenue        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 84 72 238 166
Commodity sales        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 49 54 138 106
Revenue not from contract with customers 14,802 8,342 50,490 25,963
Other Revenue        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 156 165 583 634
Business Segments        
Disaggregation of Revenue [Line Items]        
Total revenue [1] 20,873 14,423 71,884 47,000
Business Segments | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 2,838 3,011 8,481 9,154
Total revenue [1] 17,420 11,183 58,103 34,204
Business Segments | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 1,647 1,551 5,014 4,767
Total revenue [1] 1,726 1,597 5,227 4,916
Business Segments | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 1,550 1,498 7,946 7,333
Total revenue [1],[2] 1,576 1,513 8,065 7,485
Business Segments | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 84 72 238 166
Total revenue [1] 151 130 489 395
Business Segments | Transportation revenue | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 2,772 2,934 8,287 8,934
Business Segments | Transportation revenue | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 1,435 1,361 4,368 4,190
Business Segments | Transportation revenue | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 67 62 203 187
Business Segments | Transportation revenue | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Storage and other revenue | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 66 77 194 220
Business Segments | Storage and other revenue | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 172 158 532 493
Business Segments | Storage and other revenue | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 130 119 432 428
Business Segments | Storage and other revenue | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Gas distribution sales | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Gas distribution sales | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Gas distribution sales | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 1,344 1,295 7,287 6,696
Business Segments | Gas distribution sales | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Electricity revenue | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Electricity revenue | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Electricity revenue | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Business Segments | Electricity revenue | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 84 72 238 166
Business Segments | Commodity sales | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Revenue not from contract with customers 14,530 8,101 49,430 24,822
Business Segments | Commodity sales | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 40 32 114 84
Revenue not from contract with customers 59 23 152 89
Business Segments | Commodity sales | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 9 22 24 22
Revenue not from contract with customers 0 0 0 0
Business Segments | Commodity sales | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Revenue not from contract with customers 0 0 0 0
Business Segments | Other Revenue | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 52 71 192 228
Business Segments | Other Revenue | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 15 20 45 45
Business Segments | Other Revenue | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 24 18 100 138
Business Segments | Other Revenue | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 65 56 246 223
Eliminations and Other        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Total revenue 204 216 868 1,017
Eliminations and Other | Transportation revenue        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Eliminations and Other | Storage and other revenue        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Eliminations and Other | Gas distribution sales        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Eliminations and Other | Electricity revenue        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Eliminations and Other | Commodity sales        
Disaggregation of Revenue [Line Items]        
Total revenue from contracts with customers 0 0 0 0
Revenue not from contract with customers 213 218 908 1,052
Eliminations and Other | Other Revenue        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 0 0 0 0
Intersegment revenue        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers (9) (2) (40) (35)
Intersegment revenue | Liquids Pipelines        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 0 0 0 0
Intersegment revenue | Gas Transmission        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers 5 3 16 15
Intersegment revenue | Gas Distribution and Storage        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers (2) (3) 19 14
Intersegment revenue | Renewable Power Generation        
Disaggregation of Revenue [Line Items]        
Revenue not from contract with customers $ 2 $ 2 $ 5 $ 6
[1] Refer to Note 3 - Revenue for a reconciliation of segment Operating revenues to the Consolidated Statements of Earnings.
[2] Primarily relates to public utilities that are subject to regulation.