Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 55.4	$ 25.4
Receivables, less allowance for uncollectibles	270.7	299.8
Inventories, at average cost
Derivative assets	0.2	0.0
Regulatory assets	43.1	53.6
Deferred income taxes	68.2	72.8
Prepayments and other current assets	36.9	22.6
Assets held for sale	0.0	109.6
Total current assets	687.8	755.6
Property, plant and equipment
Construction work in progress	725.6	640.0
Other property	15.2	14.5
Property, plant and equipment, at original costs	10,076.5	9,733.9
Accumulated depreciation	(2,750.1)	(2,645.7)
Total property, plant and equipment, net	7,326.4	7,088.2
Other assets
Regulatory assets	330.8	348.5
Goodwill	408.4	408.3
Deferred charges and other assets	63.5	65.8
Assets held for sale	0.0	59.8
Total other assets	802.7	882.4
Total assets	8,816.9	8,726.2
Current liabilities
Long-term debt due within one year	333.3	274.5
Notes payable	128.0	139.0
Accounts payable	216.1	288.6
Customer deposits	179.9	176.2
Regulatory liabilities	69.1	57.0
Derivative liabilities	23.9	36.6
Interest accrued	54.5	39.9
Taxes accrued	60.8	29.9
Other	18.3	16.8
Liabilities associated with assets held for sale	0.0	39.4
Total current liabilities	1,083.9	1,097.9
Other liabilities
Deferred income taxes	609.1	519.2
Investment tax credits	8.8	9.0
Regulatory liabilities	716.2	729.0
Derivative liabilities	2.7	6.1
Deferred credits and other liabilities	316.9	370.9
Liabilities associated with assets held for sale	0.0	65.4
Long-term debt, less amount due within one year	3,517.7	3,354.0
Total other liabilities	$ 5,171.4	$ 5,053.6
Commitments and contingencies (see Note 10)
Capital
Common equity	$ 235.2	$ 234.9
Additional paid in capital	1,891.2	1,875.9
Retained earnings	443.8	479.6
Accumulated other comprehensive loss	(8.6)	(15.7)
Total capital	2,561.6	2,574.7
Long-term debt	3,517.7	3,354.0
Total liabilities and capital	8,816.9	8,726.2
Tampa Electric Company [Member]
Current assets
Cash and cash equivalents	33.2	10.4
Receivables, less allowance for uncollectibles	258.6	227.2
Inventories, at average cost
Taxes receivable from affiliate	0.0	43.3
Regulatory assets	39.7	52.1
Deferred income taxes	22.9	24.8
Prepayments and other current assets	25.3	17.4
Total current assets	581.5	532.6
Property, plant and equipment
Construction work in progress	703.6	624.2
Utility plant in service, at original costs	9,336.0	9,027.9
Accumulated depreciation	(2,719.6)	(2,633.8)
Utility plant in service, net	6,616.4	6,394.1
Other property	9.3	8.6
Total property, plant and equipment, net	6,625.7	6,402.7
Other assets
Unamortized debt expense	18.5	16.8
Regulatory assets	305.4	319.6
Deferred charges and other assets	325.3	339.0
Other	1.4	2.6
Total assets	7,532.5	7,274.3
Current liabilities
Long-term debt due within one year	83.3	83.3
Notes payable	0.0	58.0
Accounts payable	192.3	242.3
Customer deposits	174.2	170.4
Regulatory liabilities	65.7	54.7
Derivative liabilities	23.9	36.6
Interest accrued	41.5	17.0
Taxes accrued	62.7	12.4
Other	9.9	10.0
Total current liabilities	653.5	684.7
Other liabilities
Deferred income taxes	1,266.8	1,209.1
Investment tax credits	8.8	9.0
Regulatory liabilities	605.7	623.4
Derivative liabilities	2.7	6.1
Deferred credits and other liabilities	244.1	299.1
Long-term debt, less amount due within one year	2,179.9	2,013.8
Total other liabilities	$ 2,128.1	$ 2,146.7
Commitments and contingencies (see Note 10)
Capital
Common equity	$ 2,218.4	$ 2,130.4
Retained earnings	356.4	305.8
Accumulated other comprehensive loss	(3.8)	(7.1)
Total capital	2,571.0	2,429.1
Long-term debt	2,179.9	2,013.8
Total capitalization	4,750.9	4,442.9
Total liabilities and capital	7,532.5	7,274.3
Fuel [Member]
Inventories, at average cost
Utility inventories	135.9	96.4
Fuel [Member] | Tampa Electric Company [Member]
Inventories, at average cost
Utility inventories	127.7	85.2
Materials and Supplies [Member]
Inventories, at average cost
Utility inventories	77.4	75.4
Materials and Supplies [Member] | Tampa Electric Company [Member]
Inventories, at average cost
Utility inventories	74.1	72.2
Electric [Member]
Property, plant and equipment
Utility plant in service, at original costs	7,258.9	7,094.8
Electric [Member] | Tampa Electric Company [Member]
Property, plant and equipment
Utility plant in service, at original costs	7,258.9	7,094.8
Gas [Member]
Property, plant and equipment
Utility plant in service, at original costs	2,076.8	1,984.6
Gas [Member] | Tampa Electric Company [Member]
Property, plant and equipment
Utility plant in service, at original costs	$ 1,373.5	$ 1,308.9