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FINANCIAL STATEMENT EFFECTS OF RATE REGULATION - REGULATORY ASSETS AND LIABILITIES (Details) - CAD CAD in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
May. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 0 |  |
Enbridge Gas Distribution Inc. |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Cumulative costs relating to consulting contract capitalized |  | CAD 179 | CAD 166 |
Average service life |  | 25 years |  |
Other Postretirement Plans | Enbridge Gas Distribution Inc. |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Amount of OPEB balance expected to be collected |  | CAD 75 | 84 | CAD 89
Term for collection of OPEB balance commencing from 2013 |  |  |  | 20 years
Liquids Pipelines | Deferred income taxes |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | 1,048 | 898 |
Liquids Pipelines | Tolling Deferrals |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory Liabilities |  | (39) | (39) |
Liquids Pipelines | Pipeline future abandonment costs |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory Liabilities |  | (47) |  |
Liquids Pipelines | Transportation revenue adjustments |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 11 | 36 |
Recovery period |  | 5 years |  |
Liquids Pipelines | Recoverable income taxes |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 54 | 46 |
Recovery period |  | 30 years |  |
Gas Distribution | Deferred income taxes |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 328 | 275 |
Gas Distribution | Purchased gas variance |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 129 | 673 |
Rolling period |  | 12 months |  |
Additional rolling period | 24 months |  |  |
Gas Distribution | Pension plans and OPEB |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 104 | 171 |
Gas Distribution | Constant dollar net salvage adjustment |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | 42 | 37 |
Gas Distribution | Unabsorbed demand cost |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | 66 | 14 |
Recovery period |  |  |  | 2 years
Gas Distribution | Future removal and site restoration reserves |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory Liabilities |  | (581) | (562) |
Gas Distribution | Site restoration clearance adjustment |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory Liabilities |  | (193) | (283) |
Gas Distribution | Transaction services deferral |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory Liabilities |  | CAD (9) | (26) |
Gas Distribution | Revenue adjustment |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory Liabilities |  |  | (52) |
Gas Pipelines And Processing | Deferred income taxes |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  |  | CAD 24 |

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