Consolidated Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 63	$ 56
Adjustments to reconcile net income to cash from operating activities:
Depreciation and amortization	93	85
Deferred income taxes and investment tax credits	8	35
Deferred recovery clauses	(7)	(23)
Receivables, less allowance for uncollectibles	32	11
Inventories	2	(8)
Taxes accrued	23	16
Interest accrued	23	22
Accounts payable	(68)	(101)
Regulatory assets and liabilities	20	(5)
Other	(32)	(12)
Cash flows from operating activities	157	76
Cash flows used in investing activities
Capital expenditures	(162)	(143)
Cash flows used in investing activities	(162)	(143)
Cash flows from financing activities
Equity contributions from TECO Energy	110	27
Net increase (decrease) in short-term debt	(5)	106
Dividends to TECO Energy	(97)	(65)
Other financing activities	0	(1)
Cash flows from financing activities	8	67
Net increase in cash and cash equivalents	3	0
Cash and cash equivalents at beginning of period	13	10
Cash and cash equivalents at end of period	16	10
Supplemental disclosure of non-cash activities
Change in accrued capital expenditures	$ 0	$ (12)