Consolidated Condensed Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities
Net income	$ 155.7	$ 167.6
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	251.3	253.2
Deferred income taxes	89.1	115.2
Investment tax credits	(0.3)	(0.3)
Allowance for other funds used during construction	(4.3)	(1.6)
Non-cash stock compensation	10.2	8.5
(Loss) gain on sales of business/assets, pretax	(0.3)	14.5
Deferred recovery clauses	(3.8)	(3.7)
Asset impairment, pre-tax	0	17.4
Receivables, less allowance for uncollectibles	(64.4)	(47.3)
Inventories	3.1	7.9
Prepayments and other current assets	(4.2)	(3.1)
Taxes accrued	44.0	58.7
Interest accrued	22.2	23.6
Accounts payable	10.6	22.0
Other	(2.8)	(25.0)
Cash flows from operating activities	506.1	607.6
Cash flows from investing activities
Capital expenditures	(370.9)	(355.2)
Allowance for other funds used during construction	4.3	1.6
Net proceeds from sales of business/assets	0.4	7.4
Cash flows used in investing activities	(366.2)	(346.2)
Cash flows from financing activities
Dividends	(143.4)	(142.8)
Proceeds from the sale of common stock	7.4	3.2
Proceeds from long-term debt issuance	0	538.3
Repayment of long-term debt/Purchase in lieu of redemption	(51.6)	(469.2)
Dividends to noncontrolling interest	0	(0.3)
Cash flows used in financing activities	(187.6)	(70.8)
Net (decrease) increase in cash and cash equivalents	(47.7)	190.6
Cash and cash equivalents at beginning of the period	200.5	44.0
Cash and cash equivalents at beginning of the period	200.5
Cash and cash equivalents at end of the period	152.8	234.6
Cash and cash equivalents at end of the period	152.8
Tampa Electric Company [Member]
Cash flows from operating activities
Net income	178.2	183.9
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	221.6	214.9
Deferred income taxes	57.7	92.6
Investment tax credits	(0.3)	(0.2)
Allowance for other funds used during construction	(4.3)	(1.6)
(Loss) gain on sales of business/assets, pretax	0	(0.2)
Deferred recovery clauses	(3.8)	(3.7)
Receivables, less allowance for uncollectibles	(61.5)	(64.0)
Inventories	(2.6)	5.8
Prepayments	(5.1)	(4.3)
Taxes accrued	89.6	78.2
Interest accrued	20.0	19.4
Accounts payable	6.2	22.9
Other	1.4	4.5
Cash flows from operating activities	497.1	548.2
Cash flows from investing activities
Capital expenditures	(353.1)	(318.3)
Allowance for other funds used during construction	4.3	1.6
Net proceeds from sale of assets	0	0.3
Cash flows used in investing activities	(348.8)	(316.4)
Cash flows from financing activities
Dividends	(147.6)	(149.5)
Proceeds from the sale of common stock	20.0	53.0
Proceeds from long-term debt issuance	0	538.3
Repayment of long-term debt/Purchase in lieu of redemption	(51.6)	(460.9)
Cash flows used in financing activities	(179.2)	(19.1)
Net (decrease) increase in cash and cash equivalents	(30.9)	212.7
Cash and cash equivalents at beginning of the period	45.2	13.9
Cash and cash equivalents at end of the period	$ 14.3	$ 226.6