RELATED PARTY TRANSACTIONS (Details) - CAD CAD in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
RELATED PARTY TRANSACTIONS
Service charges	CAD 332	CAD 256	CAD 222
Lease arrangement expenses	151	21	0
Purchase of natural gas by wholly owned subsidiaries	228	315	99
Sale of natural gas by wholly owned subsidiaries	5	58	10
Amounts receivable from affiliates	152	183
Vector Pipeline joint venture
RELATED PARTY TRANSACTIONS
Service charges	7	7	CAD 6
Amounts receivable from affiliates	CAD 149	183
Vector Pipeline joint venture \| Minimum
RELATED PARTY TRANSACTIONS
Annual interest rate on the loans (as a percent)	4.00%
Vector Pipeline joint venture \| Maximum
RELATED PARTY TRANSACTIONS
Annual interest rate on the loans (as a percent)	12.00%
Other affiliates
RELATED PARTY TRANSACTIONS
Amounts receivable from affiliates	CAD 3	CAD 0

Represents the interest rate applicable for loans given to affiliates of the entity.

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- Definition

Lease expense recognized resulting from transactions (excluding transactions that are eliminated in consolidation or combined financial statements.

+ References

No definition available.

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- Definition

Represents the purchase of natural gas made by wholly owned subsidiaries of the entity.

+ References

No definition available.

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- Definition

Represents the sale of natural gas purchases made by wholly owned subsidiaries of the entity.

+ References

No definition available.

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- Definition

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due after 1 year (or 1 business cycle).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

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