SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT Condensed Statements of Operations (Parent Company Only) (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2015	[1],[2]	Sep. 30, 2015	[1],[2]	Jun. 30, 2015	[1],[2]	Mar. 31, 2015	[1],[2]	Dec. 31, 2014	[2],[3]	Sep. 30, 2014	[2],[3]	Jun. 30, 2014	[2],[3]	Mar. 31, 2014	[2],[3]	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Condensed Financial Statements, Captions
Other income																	$ 1,017		$ 1,005		$ 1,139
General and administrative expense																	(144,919)		(115,031)		(149,109)
Interest expense																	(203,779)		(186,636)		(168,319)
Loss on extinguishment of debt																	0		(29,205)		0
Other expense																	(3,207)		(4,511)		(6,571)
INCOME BEFORE INCOME TAXES																	383,877		394,405		352,368
INCOME TAX PROVISION																	141,471		150,322		118,862
NET INCOME	$ 37,365		$ 65,573		$ 72,336		$ 67,132		$ 46,738		$ 73,873		$ 54,336		$ 69,136		242,406	[1],[2]	244,083	[2],[3]	233,506
ITC Holdings Corp.
Condensed Financial Statements, Captions
Other income																	996		786		1,487
General and administrative expense																	(5,526)		(7,336)		(56,707)
Interest expense																	(106,442)		(105,411)		(98,660)
Loss on extinguishment of debt																	0		(29,205)		0
Other expense																	(163)		(196)		(3,609)
INCOME BEFORE INCOME TAXES																	(111,135)		(141,362)		(157,489)
INCOME TAX PROVISION																	(45,652)		(55,646)		(72,798)
LOSS AFTER TAXES																	(65,483)		(85,716)		(84,691)
EQUITY IN SUBSIDIARIES’ NET EARNINGS																	307,889		329,799		318,197
NET INCOME																	$ 242,406		$ 244,083		$ 233,506

[1] During the third and fourth quarters of 2015, we recognized an aggregate regulatory liability for the refund relating to the formula rate template modifications filing as described in Note 4, which resulted in a reduction in operating revenues and operating income of $9.5 million and an estimated $6.2 million reduction to net income for the year ended December 31, 2015.

[2] During the year ended December 31, 2015 and the fourth quarter of 2014, we recognized an aggregate estimated regulatory liability for the potential refunds relating to the ROE complaints as described in Note 16, which resulted in a reduction in operating revenues and operating income of $115.1 million and $46.9 million and an estimated $73.2 million and $28.9 million reduction to net income for the years ended December 31, 2015 and 2014, respectively.

[3] During the second quarter of 2014, we incurred a loss on extinguishment of debt of $29.2 million related to the tender of ITC Holdings Senior Notes as described in Note 8, which resulted in an estimated reduction to net income of $18.2 million.