Consolidated Statements of Income and Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Total revenues	$ 2,743.5	$ 2,566.4	$ 2,355.1
Expenses
Fuel	638.6	692.3	680.2
Purchased power	78.9	71.4	64.7
Cost of natural gas sold	271.6	209.7	142.2
Other	613.2	547.8	524.4
Depreciation and amortization	349.0	315.3	291.8
Taxes, other than income	207.4	195.0	184.7
Total expenses	2,181.4	2,061.0	1,900.5
Income from operations	562.1	505.4	454.6
Other income (expense)
Allowance for other funds used during construction	17.4	10.5	6.3
Other income	3.4	0.5	1.8
Total other income	20.8	11.0	8.1
Interest charges
Interest expense	195.1	176.4	165.0
Allowance for borrowed funds used during construction	(8.7)	(5.3)	(3.6)
Total interest charges	186.4	171.1	161.4
Income from continuing operations before provision for income taxes	396.5	345.3	301.3
Provision for income taxes	155.3	138.9	112.6
Net income	173.5	130.4	197.7
Other comprehensive income, net of tax
Gain on cash flow hedges	3.5	0.7	1.4
Other comprehensive income (loss), net of tax	3.5	(2.5)	17.8
Comprehensive income	177.0	127.9	215.5
Tampa Electric Company [Member]
Revenues
Electric	2,017.7	2,020.5	1,950.1
Gas	401.5	398.5	392.7
Total revenues	2,419.2	2,419.0	2,342.8
Expenses
Fuel	638.6	692.3	680.2
Purchased power	78.9	71.4	64.7
Cost of natural gas sold	135.5	137.0	142.6
Other	528.9	518.4	523.6
Depreciation and amortization	313.5	302.6	290.3
Taxes, other than income	192.0	189.8	183.1
Total expenses	1,887.4	1,911.5	1,884.5
Income from operations	531.8	507.5	458.3
Other income (expense)
Allowance for other funds used during construction	17.2	10.5	6.3
Other income	2.4	4.8	5.1
Total other income	19.6	15.3	11.4
Interest charges
Interest expense	117.9	111.7	108.9
Allowance for borrowed funds used during construction	(8.3)	(5.1)	(3.6)
Total interest charges	109.6	106.6	105.3
Income from continuing operations before provision for income taxes	441.8	416.2	364.4
Provision for income taxes	165.5	155.9	138.8
Net income	276.3	260.3	225.6
Other comprehensive income, net of tax
Gain on cash flow hedges	3.5	0.7	0.9
Other comprehensive income (loss), net of tax	3.5	0.7	0.9
Comprehensive income	$ 279.8	$ 261.0	$ 226.5