DEBT AND CREDIT FACILITIES (Tables)

12 Months Ended

Dec. 31, 2018


		Weighted Average					Weighted Average
		Interest Rate for the					Interest Rate for the
		Year Ended					Year Ended
(millions of dollars)	2018	December 31, 2018			2017		December 31, 2017
TC PipeLines, LP
Senior Credit Facility due 2021	40	3.14	%		185		2.41	%
2013 Term Loan Facility due 2022	500	3.23	%		500		2.33	%
2015 Term Loan Facility due 2020	—	—			170		2.22	%
4.65% Unsecured Senior Notes due 2021	350	4.65	%	(a)	350		4.65	%	(a)
4.375% Unsecured Senior Notes due 2025	350	4.375	%	(a)	350		4.375	%	(a)
3.90 % Unsecured Senior Notes due 2027	500	3.90	%	(a)	500		3.90	%	(a)
GTN
5.29% Unsecured Senior Notes due 2020	100	5.29	%	(a)	100		5.29	%	(a)
5.69% Unsecured Senior Notes due 2035	150	5.69	%	(a)	150		5.69	%	(a)
Unsecured Term Loan Facility due 2019	35	2.93	%		55		2.02	%
PNGTS
Revolving Credit Facility due 2023	19	3.55	%		—		—
5.90% Senior Secured Notes due 2018	—	—			30		5.90	%	(a)
Tuscarora
Unsecured Term Loan due 2020	24	3.10	%		25		2.27	%
North Baja
Unsecured Term Loan due 2021	50	3.54	%		—		—
	2,118				2,415
Less:unamortized debt issuance costs and debt discount	10				12
Less: current portion	36				51	(b)
	2,072				2,352

^(a)

Fixed interest rate.

^(b)

Includes the PNGTS portion due at December 31, 2017 amounting to $5.8 million that was paid on January 2, 2018.