DEBT AND CREDIT FACILITIES (Tables)

6 Months Ended

Jun. 30, 2016

DEBT AND CREDIT FACILITIES

Schedule of debt and credit facilities

(unaudited) (millions of dollars)	June 30, 2016	December 31, 2015	Weighted Average Interest Rate for the Six Months Ended June 30, 2016
TC PipeLines, LP Senior Credit Facility due 2017	250	200	1.69	%
TC PipeLines, LP 2013 Term Loan Facility due 2018	500	500	1.69	%
TC PipeLines, LP 2015 Term Loan Facility due 2018	170	170	1.58	%
TC PipeLines, LP 4.65% Unsecured Senior Notes due 2021	350	350	4.65	%(b)
TC PipeLines, LP 4.375% Unsecured Senior Notes due 2025	350	350	4.375	%(b)
GTN 5.29% Unsecured Senior Notes due 2020	100	100	5.29	%(b)
GTN 5.69% Unsecured Senior Notes due 2035	150	150	5.69	%(b)
GTN Unsecured Term Loan Facility due 2019	65	75	1.38	%
Tuscarora Unsecured Term Loan due 2019	10	—	1.57	%
Tuscarora 3.82% Series D Senior Notes due 2017	16	16	3.82	%(b)
	1,961	1,911
Less: unamortized debt issuance costs and debt discount (a)	8	8
Less: current portion	15	14
	1,938	1,889

(a) As a result of the application of ASU No. 2015-03 and similar to the presentation of debt discounts, debt issuance costs of $7 million at December 31, 2015 previously reported as other assets in the balance sheet were reclassified as an offset against debt. Refer to Note 3, Accounting Pronouncements.

(b) Fixed interest rate

Schedule of principal repayments required on debt

(unaudited)
(millions of dollars)
2016	4
2017	273
2018	691
2019	43
2020	100
Thereafter	850
	1,961