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RELATED PARTY TRANSACTIONS (Details) - CAD CAD in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
RELATED PARTY TRANSACTIONS |  |
Service charges | CAD 332 | CAD 256
Lease arrangement expenses | 151 | 21
Purchase of natural gas by wholly owned subsidiaries | 228 | 315
Sale of natural gas by wholly owned subsidiaries | 5 | 58
Amounts receivable from affiliates | 152 | 183
Vector Pipeline joint venture |  |
RELATED PARTY TRANSACTIONS |  |
Service charges | 7 | 7
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

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