Consolidated Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income	$ 148	$ 142
Adjustments to reconcile net income to cash from operating activities:
Depreciation and amortization	182	173
Deferred income taxes and investment tax credits	14	87
Deferred recovery clauses	(25)	(52)
Receivables, less allowance for uncollectibles	2	(23)
Inventories	5	(16)
Taxes accrued	28	27
Accounts payable	(37)	(88)
Regulatory assets and liabilities	54	(6)
Other	(25)	(16)
Cash flows from operating activities	346	228
Cash flows used in investing activities
Capital expenditures	(510)	(299)
Cash flows used in investing activities	(510)	(299)
Cash flows from financing activities
Equity contributions from TECO Energy	215	58
Proceeds from long-term debt issuance	345	0
Repayment of long-term debt	(304)	0
Net increase in short-term debt	70	128
Dividends to TECO Energy	(160)	(109)
Other financing activities	0	(1)
Cash flows from financing activities	166	76
Net increase in cash and cash equivalents	2	5
Cash and cash equivalents at beginning of period	13	10
Cash and cash equivalents at end of period	15	15
Supplemental disclosure of non-cash activities
Change in accrued capital expenditures	$ 18	$ (24)