Consolidated Condensed Statements of Income (Parenthetical) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Franchise fees and gross receipts taxes	$ 27.1	$ 28.1	$ 55.5	$ 59.0
Tampa Electric Co [Member] | Electric [Member]
Franchise fees and gross receipts taxes	21.3	21.8	40.6	43.2
Tampa Electric Co [Member] | Gas [Member]
Franchise fees and gross receipts taxes	5.8	6.3	14.9	15.8
Electric And Gas [Member]
Franchise fees and gross receipts taxes	27.1	28.1	55.5	59.0
Tampa Electric Co [Member]
Franchise fees and gross receipts taxes	$ 27.1	$ 28.1	$ 55.5	$ 59.0