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NON-CONTROLLING INTERESTS (Tables)
 12 Months Ended
Dec. 31, 2019
Noncontrolling Interest [Abstract]  
Schedule of Non-Controlling Interests
The Company's Non-controlling interests included on the Consolidated balance sheet are as follows:
at December 31
2019

 
2018

(millions of Canadian $)
 
 
 
 
Non-controlling interest in TC PipeLines, LP
1,634

 
1,655


The Company's Net income/(loss) attributable to non-controlling interests included in the Consolidated statement of income are as follows:
year ended December 31
2019

 
2018

 
2017

(millions of Canadian $)
 
 
 
 
 
 
Non-controlling interest in TC PipeLines, LP
293

 
(185
)
 
220

Non-controlling interest in Portland Natural Gas Transmission System1
—

 
—

 
9

Non-controlling interest in Columbia Pipeline Partners LP2
—

 
—

 
9

 
293

 
(185
)
 
238


1
Non-controlling interest in 2017 for the period January to May when TC Energy sold its remaining interest in Portland to TC PipeLines, LP.
2
Non-controlling interest up to the February 17, 2017 acquisition of all publicly held common units of Columbia Pipeline Partners LP.