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ACCOUNTS PAYABLE AND OTHER
 12 Months Ended
Dec. 31, 2017
Payables and Accruals [Abstract]  
ACCOUNTS PAYABLE AND OTHER
ACCOUNTS PAYABLE AND OTHER
at December 31
2017

 
2016

(millions of Canadian $)
 
 
 
 
Trade payables
2,847

 
2,443

Fair value of derivative contracts (Note 23)
387

 
607

Unredeemed shares of Columbia
312

 
317

Regulatory liabilities (Note 10)
263

 
178

Other
262

 
331

 
4,071

 
3,876