RELATED PARTY TRANSACTIONS (Tables)

6 Months Ended

Jun. 30, 2020

Related Party Transactions [Abstract]

Summary of related party transactions

Capital and operating costs charged to our pipeline systems, except for Iroquois, for the three and six months ended June 30, 2020 and 2019 by TC Energy’s subsidiaries and amounts payable to TC Energy’s subsidiaries at June 30, 2020 and December 31, 2019 are summarized in the following tables:

	Three months ended		Six months ended
(unaudited)	June 30,		June 30,
(millions of dollars)	2020	2019	2020	2019
Capital and operating costs charged by TC Energy’s subsidiaries to:
Great Lakes (a)	11	12	22	23
Northern Border (a)	10	10	20	19
GTN	12	11	24	21
Bison	1	—	1	1
North Baja	1	2	2	3
Tuscarora	1	1	2	2
PNGTS (a)	1	1	3	3
Impact on the Partnership’s income (b):
Great Lakes	5	5	9	10
Northern Border	4	5	8	9
GTN	7	8	15	16
Bison	1	—	1	1
North Baja	1	1	2	2
Tuscarora	1	1	2	2
PNGTS	1	1	2	2

(unaudited)
(millions of dollars)	June 30, 2020	December 31, 2019
Net amounts payable to TC Energy’s subsidiaries are as follows:
Great Lakes (a)	4	5
Northern Border (a)	4	4
GTN	4	5
Bison	—	—
North Baja	—	1
Tuscarora	—	—
PNGTS (a)	1	1

^(a)Represents 100 percent of the costs.

^(b)Represents the Partnership's proportionate share based ownership percentage of these pipelines.