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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, 2016 | Dec. 31, 2015 | Dec. 31, 2013
Enbridge Gas Distribution Inc. | Capitalized Costs of Consulting Contract |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Cumulative costs relating to consulting contract capitalized |  | CAD 181 | CAD 179 |
Average service life |  | 25 years |  |
Liquids Pipelines | Deferred income taxes |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 1,270 | 1,048 |
Liquids Pipelines | Tolling Deferrals |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory liabilities |  | (37) | (39) |
Liquids Pipelines | Recoverable income taxes |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 51 | 54 |
Recovery period |  | 30 years |  |
Liquids Pipelines | Pipeline future abandonment costs |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory liabilities |  | CAD (88) | (47) |
Liquids Pipelines | Transportation revenue adjustments |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  |  | 11 |
Gas Distribution | Deferred income taxes |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | 385 | 328 |
Gas Distribution | Purchased gas variance |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 5 | 129 |
Rolling period |  | 12 months |  |
Additional rolling period | 24 months |  |  |
Gas Distribution | Pension plans and OPEB |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | CAD 116 | 104 |
Gas Distribution | Constant dollar net salvage adjustment |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  | 38 | 42 |
Gas Distribution | Unabsorbed demand cost |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory assets |  |  | 66 |
Gas Distribution | Future removal and site restoration reserves |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory liabilities |  | (606) | (581) |
Gas Distribution | Site restoration clearance adjustment |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory liabilities |  | (109) | (193) |
Gas Distribution | Transaction services deferral |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Regulatory liabilities |  | (4) | (9) |
Gas Distribution | OPEB |  |  |  |
FINANCIAL STATEMENT EFFECTS |  |  |  |
Amount of OPEB balance expected to be collected |  | CAD 71 | CAD 75 | CAD 89
Term for collection of OPEB balance commencing from 2013 |  |  |  | 20 years

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