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PROPERTY, PLANT AND EQUIPMENT (Details) CAD in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2014 CAD | Mar. 31, 2014 USD ($) | Mar. 31, 2014 CAD | Dec. 31, 2015 CAD | Dec. 31, 2014 CAD | Dec. 31, 2013 CAD
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, Plant and Equipment, Net, Total |  |  |  | CAD 64,434 | CAD 53,830 |
Depreciation expense |  |  |  | 1,852 | 1,461 | CAD 1,282
Discontinued Operations |  |  |  |  |  |
Gain resulted from the cash proceeds and disposition of net liabilities held for sale |  |  |  |  | 46 | 4
Liquids Pipelines |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 8,802 | 26,328 |
Accumulated depreciation |  |  |  | (1,200) | (4,312) |
Property, Plant and Equipment, Net, Total |  |  |  | 7,602 | 22,016 |
Property, plant and equipment not transferred |  |  |  |  | 15,635 |
Property, plant and equipment disposed | CAD 62 |  |  |  |  |
Property, plant and equipment reclassified to Long-term investments | CAD 136 |  |  |  |  |
Liquids Pipelines | Southern Access Extension Project |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Ownership percent sold | 35.00% |  |  |  |  |
Gas Distribution |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 9,806 | 8,863 |
Accumulated depreciation |  |  |  | (2,379) | (2,256) |
Property, Plant and Equipment, Net, Total |  |  |  | 7,427 | 6,607 |
Gas Pipelines, Processing and Energy Services |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 5,106 | 5,379 |
Accumulated depreciation |  |  |  | (643) | (454) |
Property, Plant and Equipment, Net, Total |  |  |  | 4,463 | 4,925 |
Property, plant and equipment not transferred |  |  |  |  | 995 |
Discontinued Operations |  |  |  |  |  |
Gain resulted from the cash proceeds and disposition of net liabilities held for sale |  |  |  |  | 46 | 4
Sponsored Investments |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 53,897 | 24,085 |
Accumulated depreciation |  |  |  | (9,087) | (3,903) |
Property, Plant and Equipment, Net, Total |  |  |  | 44,810 | 20,182 |
Corporate |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 189 | 149 |
Accumulated depreciation |  |  |  | (57) | (49) |
Property, Plant and Equipment, Net, Total |  |  |  | 132 | 100 |
Enbridge Energy Partners, L.P. |  |  |  |  |  |
Impairment |  |  |  |  |  |
impairment charges |  |  |  | CAD 96 |  |
Pipeline | Liquids Pipelines |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 2.90% |  |
Property, plant and equipment, gross |  |  |  | CAD 6,356 | 12,515 |
Pipeline | Gas Pipelines, Processing and Energy Services |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 4.20% |  |
Property, plant and equipment, gross |  |  |  | CAD 777 | 633 |
Pipeline | Sponsored Investments |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 2.60% |  |
Property, plant and equipment, gross |  |  |  | CAD 27,317 | 11,564 |
Pumping equipment, buildings, tanks and other | Liquids Pipelines |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 3.80% |  |
Property, plant and equipment, gross |  |  |  | CAD 1,464 | 7,715 |
Pumping equipment, buildings, tanks and other | Sponsored Investments |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 3.10% |  |
Property, plant and equipment, gross |  |  |  | CAD 17,008 | 7,806 |
Gas mains, services and other | Gas Distribution |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 3.00% |  |
Property, plant and equipment, gross |  |  |  | CAD 8,819 | 8,427 |
Wind turbines, solar panels and other | Gas Pipelines, Processing and Energy Services |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 4.70% |  |
Property, plant and equipment, gross |  |  |  | CAD 2,162 | 2,371 |
Wind turbines, solar panels and other | Sponsored Investments |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 4.00% |  |
Property, plant and equipment, gross |  |  |  | CAD 2,582 | 1,549 |
Power transmission | Gas Pipelines, Processing and Energy Services |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 1.80% |  |
Property, plant and equipment, gross |  |  |  | CAD 387 | 397 |
Canadian Midstream gas gathering and processing | Gas Pipelines, Processing and Energy Services |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 2.90% |  |
Property, plant and equipment, gross |  |  |  | CAD 789 | 778 |
Land and right-of-way | Liquids Pipelines |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 1.90% |  |
Property, plant and equipment, gross |  |  |  | CAD 228 | 520 |
Land and right-of-way | Gas Distribution |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 1.00% |  |
Property, plant and equipment, gross |  |  |  | CAD 85 | 84 |
Land and right-of-way | Gas Pipelines, Processing and Energy Services |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 3.20% |  |
Property, plant and equipment, gross |  |  |  | CAD 58 | 28 |
Land and right-of-way | Sponsored Investments |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 2.50% |  |
Property, plant and equipment, gross |  |  |  | CAD 1,660 | 1,040 |
Other | Corporate |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Weighted Average Depreciation Rate (as a percent) |  |  |  | 6.80% |  |
Property, plant and equipment, gross |  |  |  | CAD 184 | 80 |
Under construction | Liquids Pipelines |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 754 | 5,578 |
Under construction | Gas Distribution |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 902 | 352 |
Under construction | Gas Pipelines, Processing and Energy Services |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 933 | 1,172 |
Under construction | Sponsored Investments |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 5,330 | 2,126 |
Under construction | Corporate |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT |  |  |  |  |  |
Property, plant and equipment, gross |  |  |  | 5 | 69 |
Offshore Member | Disposed of by Sale |  |  |  |  |  |
Discontinued Operations |  |  |  |  |  |
Cash proceeds from sale of assets |  | $ 10 | CAD 11 |  |  |
Gain resulted from the cash proceeds and disposition of net liabilities held for sale |  | 63 | 70 |  |  |
Amount of disposition of net liabilities held for sale |  | $ 53 | CAD 59 |  |  |
Offshore Member | Held-for-sale |  |  |  |  |  |
Discontinued Operations |  |  |  |  |  |
Revenues presented as discontinued operations |  |  |  |  | CAD 4 | CAD 26
Berthold rail facility | Enbridge Energy Partners, L.P. |  |  |  |  |  |
Impairment |  |  |  |  |  |
impairment charges |  |  |  | 80 |  |
Louisiana propylene pipeline | Enbridge Energy Partners, L.P. |  |  |  |  |  |
Impairment |  |  |  |  |  |
impairment charges |  |  |  | CAD 16 |  |

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