DEBT AND CREDIT FACILITIES (Tables)

6 Months Ended

Jun. 30, 2018

DEBT AND CREDIT FACILITIES

Schedule of debt and credit facilities

(unaudited) (millions of dollars)	June 30, 2018	Weighted Average Interest Rate for the Six Months Ended June 30, 2018		December 31, 2017		Weighted Average Interest Rate for the Year Ended December 31, 2017
TC PipeLines, LP
Senior Credit Facility due 2021	140	2.99	%	185		2.41	%
2013 Term Loan Facility due 2022	500	3.02	%	500		2.33	%
2015 Term Loan Facility due 2020	170	2.91	%	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	2.71	%	55		2.02	%
PNGTS
Revolving Credit Facility due 2023	—	—		—		—
5.90% Senior Secured Notes due 2018	—	—		30	(b)	5.90	%(a)
Tuscarora
Unsecured Term Loan due 2020	25	2.87	%	25		2.27	%
	2,320			2,415
Less: unamortized debt issuance costs and debt discount	12			12
Less: current portion	36			51	(b)
	2,272			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.

Schedule of principal repayments required on debt

(unaudited)
(millions of dollars)
2018	1
2019	36
2020	293
2021	490
2022	500
Thereafter	1,000
	2,320