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PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - CAD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
PROPERTY, PLANT AND EQUIPMENT |  |  |
Total property, plant and equipment | $ 112,184 |  | $ 105,813
Total accumulated depreciation | (17,644) |  | (15,102)
Property, plant and equipment, net | $ 94,540 | $ 90,823 | 90,711
Pipelines |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 2.60% |  |
Total property, plant and equipment | $ 50,078 |  | 47,720
Pumping equipment, buildings, tanks and other |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 3.00% |  |
Total property, plant and equipment | $ 16,935 |  | 16,610
Land and right-of-way1 |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 2.70% |  |
Total property, plant and equipment | $ 2,603 |  | 2,538
Gas mains, services and other |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 3.20% |  |
Total property, plant and equipment | $ 17,474 |  | 17,026
Compressors, meters and other operating equipment |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 1.70% |  |
Total property, plant and equipment | $ 5,893 |  | 5,774
Processing and treating plants |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 1.50% |  |
Total property, plant and equipment | $ 1,634 |  | 1,440
Storage |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 1.90% |  |
Total property, plant and equipment | $ 1,713 |  | 1,545
Wind turbines, solar panels and other |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 4.20% |  |
Total property, plant and equipment | $ 5,063 |  | 4,804
Power transmission |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 2.60% |  |
Total property, plant and equipment | $ 383 |  | 365
Vehicles, office furniture, equipment and other buildings and improvements |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 5.90% |  |
Total property, plant and equipment | $ 630 |  | 390
Under construction |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |
Weighted Average Depreciation Rate | 0.00% |  |
Total property, plant and equipment | $ 9,778 |  | $ 7,601

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