CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	$ 80	$ 65
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	41	39
Recognition, refund and collection of revenue accruals and deferrals — including accrued interest	(18)	(17)
Deferred income tax expense	46	161
Allowance for equity funds used during construction	(8)	(8)
Other	6	9
Changes in assets and liabilities, exclusive of changes shown separately:
Accounts receivable	(13)	(11)
Income tax receivable	3	(141)
Other current assets	6	(2)
Accounts payable	3	6
Accrued compensation	4	(6)
Accrued interest	(7)	(13)
Accrued taxes	(14)	(11)
Other current liabilities	3	(3)
Net estimated refund related to return on equity complaints	(120)	19
Other non-current assets and liabilities, net	(4)	1
Net cash provided by operating activities	8	88
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(204)	(209)
Contributions in aid of construction	2	5
Other	0	9
Net cash used in investing activities	(202)	(195)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings under revolving credit agreements	333	244
Borrowings under term loan credit agreements	250	0
Net (retirement) issuance of commercial paper, net of discount	(11)	211
Repayments of revolving credit agreements	(349)	(331)
Dividends on common and restricted stock	0	(29)
Dividends to ITC Investment Holdings Inc.	(33)	0
Refundable deposits from generators for transmission network upgrades	7	5
Other	(5)	1
Net cash provided by financing activities	192	101
NET DECREASE IN CASH AND CASH EQUIVALENTS	(2)	(6)
CASH AND CASH EQUIVALENTS — Beginning of period	8	14
CASH AND CASH EQUIVALENTS — End of period	$ 6	$ 8