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RELATED PARTY TRANSACTIONS (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
RELATED PARTY TRANSACTIONS |  |  |
Amounts receivable from affiliates | $ 1,108 | $ 1,023 |
Minimum |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Annual interest rate on the loans (as a percent) | 3.00% |  |
Maximum |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Annual interest rate on the loans (as a percent) | 8.00% |  |
Significantly Influenced Investees | Alliance Pipeline Limited | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | $ 0 | 0 | $ 0
Significantly Influenced Investees | Alliance Pipeline Limited | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 0 | 0 | 0
Significantly Influenced Investees | Alliance Pipeline Limited | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Alliance Pipeline Limited | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 81 | 112 | 93
Significantly Influenced Investees | Alliance Pipeline Limited | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Aux Sable Midstream LLC | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Aux Sable Midstream LLC | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 0 | 0 | 0
Significantly Influenced Investees | Aux Sable Midstream LLC | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Aux Sable Midstream LLC | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 2 | 14 | 8
Significantly Influenced Investees | Aux Sable Midstream LLC | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Aux Sable Canada LP | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Aux Sable Canada LP | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 0 | 0 | 0
Significantly Influenced Investees | Aux Sable Canada LP | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 61 | 72
Significantly Influenced Investees | Aux Sable Canada LP | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 91 | 272 | 189
Significantly Influenced Investees | Aux Sable Canada LP | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Seaway Crude Pipeline System | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Seaway Crude Pipeline System | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 342 | 327 | 309
Significantly Influenced Investees | Seaway Crude Pipeline System | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Seaway Crude Pipeline System | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 256 | 240 | 149
Significantly Influenced Investees | Seaway Crude Pipeline System | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Alliance Canada Marketing L.P. | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Alliance Canada Marketing L.P. | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 0 | 0 | 0
Significantly Influenced Investees | Alliance Canada Marketing L.P. | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 64 | 106 | 125
Significantly Influenced Investees | Alliance Canada Marketing L.P. | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 17 | 46 | 49
Significantly Influenced Investees | Alliance Canada Marketing L.P. | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Nexus Gas Transmission, LLC | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 69 | 62 | 9
Significantly Influenced Investees | Nexus Gas Transmission, LLC | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 21 | 17 | 2
Significantly Influenced Investees | Nexus Gas Transmission, LLC | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Nexus Gas Transmission, LLC | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Nexus Gas Transmission, LLC | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 116 | 114 | 0
Significantly Influenced Investees | Vector Pipeline L.P. | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Vector Pipeline L.P. | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 7 | 7 | 7
Significantly Influenced Investees | Vector Pipeline L.P. | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Vector Pipeline L.P. | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 1
Significantly Influenced Investees | Vector Pipeline L.P. | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 19 | 19 | 20
Significantly Influenced Investees | Énergir, L.P. | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 37 | 38 |
Significantly Influenced Investees | Énergir, L.P. | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 0 | 0 |
Significantly Influenced Investees | Énergir, L.P. | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 |
Significantly Influenced Investees | Énergir, L.P. | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 |
Significantly Influenced Investees | Énergir, L.P. | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 |
Significantly Influenced Investees | DCP Midstream, LLC | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 3 | 4 | 5
Significantly Influenced Investees | DCP Midstream, LLC | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 0 | 0 | 0
Significantly Influenced Investees | DCP Midstream, LLC | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 24 | 36 | 52
Significantly Influenced Investees | DCP Midstream, LLC | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | DCP Midstream, LLC | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Gulfstream Management and Operating Services, LLC | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Gulfstream Management and Operating Services, LLC | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 4 | 4 | 5
Significantly Influenced Investees | Gulfstream Management and Operating Services, LLC | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Gulfstream Management and Operating Services, LLC | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Gulfstream Management and Operating Services, LLC | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Sabal Trail Transmission, LLC | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Sabal Trail Transmission, LLC | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 25 | 23 | 18
Significantly Influenced Investees | Sabal Trail Transmission, LLC | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Sabal Trail Transmission, LLC | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Sabal Trail Transmission, LLC | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Steckman Ridge, LP | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Steckman Ridge, LP | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 4 | 4 | 4
Significantly Influenced Investees | Steckman Ridge, LP | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 | 0 | 0
Significantly Influenced Investees | Steckman Ridge, LP | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | 0 | 0
Significantly Influenced Investees | Steckman Ridge, LP | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 | $ 0 | $ 0
Significantly Influenced Investees | Noverco | Transportation and other services |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 0 |  |
Significantly Influenced Investees | Noverco | Operating and Administrative |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Operating and administrative | 0 |  |
Significantly Influenced Investees | Noverco | Commodity Sales |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Transportation and other services and Commodity sales | 3 |  |
Significantly Influenced Investees | Noverco | Commodity Costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | 0 |  |
Significantly Influenced Investees | Noverco | Gas Distribution costs |  |  |
RELATED PARTY TRANSACTIONS |  |  |
Commodity costs and Gas distribution costs | $ 0 |  |

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