Consolidated Condensed Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 32.8	$ 25.4
Receivables, less allowance for uncollectibles	262.8	299.8
Inventories, at average cost
Derivative assets	0.3	0
Regulatory assets	52.0	53.6
Deferred income taxes	63.2	72.8
Prepayments and other current assets	32.2	22.6
Assets held for sale	97.1	109.6
Total current assets	728.7	755.6
Property, plant and equipment
Construction work in progress	634.7	640.0
Other property	14.6	14.5
Property, plant and equipment, at original costs	9,810.6	9,733.9
Accumulated depreciation	(2,645.9)	(2,645.7)
Total property, plant and equipment, net	7,164.7	7,088.2
Other assets
Regulatory assets	350.0	348.5
Goodwill	408.4	408.3
Deferred charges and other assets	64.8	65.8
Assets held for sale	60.9	59.8
Total other assets	884.1	882.4
Total assets	8,777.5	8,726.2
Current liabilities
Long-term debt due within one year	524.5	274.5
Notes payable	206.0	139.0
Accounts payable	248.4	288.6
Customer deposits	178.2	176.2
Regulatory liabilities	49.4	57.0
Derivative liabilities	35.5	36.6
Interest accrued	57.7	39.9
Taxes accrued	29.0	29.9
Other	16.7	16.8
Liabilities associated with assets held for sale	33.7	39.4
Total current liabilities	1,379.1	1,097.9
Other liabilities
Deferred income taxes	547.9	519.2
Investment tax credits	8.9	9.0
Regulatory liabilities	720.0	729.0
Derivative liabilities	5.3	6.1
Deferred credits and other liabilities	360.1	370.9
Liabilities associated with assets held for sale	65.7	65.4
Long-term debt, less amount due within one year	3,103.2	3,354.0
Total other liabilities	4,811.1	5,053.6
Commitments and contingencies (see Note 10)
Capital
Common equity	235.6	234.9
Additional paid in capital	1,881.9	1,875.9
Retained earnings	484.6	479.6
Accumulated other comprehensive loss	(14.8)	(15.7)
Total capital	2,587.3	2,574.7
Long-term debt	3,103.2	3,354.0
Total liabilities and capital	8,777.5	8,726.2
Tampa Electric Company [Member]
Current assets
Cash and cash equivalents	15.0	10.4
Receivables, less allowance for uncollectibles	213.7	227.2
Inventories, at average cost
Derivative assets	0.3	0
Taxes receivable from affiliate	0	43.3
Regulatory assets	51.6	52.1
Deferred income taxes	17.7	24.8
Prepayments and other current assets	22.5	17.4
Total current assets	499.3	532.6
Property, plant and equipment
Construction work in progress	626.9	624.2
Utility plant in service, at original costs	9,098.2	9,027.9
Accumulated depreciation	(2,627.7)	(2,633.8)
Utility plant in service, net	6,470.5	6,394.1
Other property	8.7	8.6
Total property, plant and equipment, net	6,479.2	6,402.7
Other assets
Unamortized debt expense	16.4	16.8
Regulatory assets	322.3	319.6
Deferred charges and other assets	341.6	339.0
Other	2.9	2.6
Total assets	7,320.1	7,274.3
Current liabilities
Long-term debt due within one year	83.3	83.3
Notes payable	47.0	58.0
Accounts payable	227.6	242.3
Customer deposits	172.4	170.4
Regulatory liabilities	48.8	54.7
Derivative liabilities	35.5	36.6
Interest accrued	39.9	17.0
Taxes accrued	41.8	12.4
Other	10.0	10.0
Total current liabilities	706.3	684.7
Other liabilities
Deferred income taxes	1,225.4	1,209.1
Investment tax credits	8.9	9.0
Regulatory liabilities	612.9	623.4
Derivative liabilities	5.3	6.1
Long-term debt, less amount due within one year	2,013.8	2,013.8
Total other liabilities	2,143.4	2,146.7
Other	290.9	299.1
Commitments and contingencies (see Note 10)
Capital
Common equity	2,150.4	2,130.4
Retained earnings	313.0	305.8
Accumulated other comprehensive loss	(6.8)	(7.1)
Total capital	2,456.6	2,429.1
Long-term debt	2,013.8	2,013.8
Total capitalization	4,470.4	4,442.9
Total liabilities and capital	7,320.1	7,274.3
Fuel [Member]
Inventories, at average cost
Utility inventories	113.6	96.4
Fuel [Member] | Tampa Electric Company [Member]
Inventories, at average cost
Utility inventories	107.0	85.2
Materials and Supplies [Member]
Inventories, at average cost
Utility inventories	74.7	75.4
Materials and Supplies [Member] | Tampa Electric Company [Member]
Inventories, at average cost
Utility inventories	71.5	72.2
Electric [Member]
Property, plant and equipment
Utility plant in service, at original costs	7,152.7	7,094.8
Electric [Member] | Tampa Electric Company [Member]
Property, plant and equipment
Utility plant in service, at original costs	7,152.7	7,094.8
Gas [Member]
Property, plant and equipment
Utility plant in service, at original costs	2,008.6	1,984.6
Gas [Member] | Tampa Electric Company [Member]
Property, plant and equipment
Utility plant in service, at original costs	$ 1,318.6	$ 1,308.9