Consolidated Condensed Statements Of Income (USD $) In Millions, except Per Share data	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Revenues
Regulated electric and gas	$ 685.5		$ 707.4		$ 1,929.1		$ 2,079.1
Unregulated	225.9		194.4		664.1		633.8
Total revenues	911.4		901.8		2,593.2		2,712.9
Expenses
Fuel	226.3		224.5		565.4		573.9
Purchased power	32.1		45.2		103.2		151.5
Cost of natural gas sold	41.5		61.0		177.6		236.4
Other	82.2		96.1		242.6		280.5
Operation other expense
Mining related costs	132.3		119.9		387.0		375.1
Guatemalan power generation	22.1		15.6		64.9		48.5
Other	2.1		1.9		5.2		5.0
Maintenance	44.0		44.6		141.3		137.1
Depreciation and amortization	82.4		78.8		243.4		233.7
Recoveries from previously impaired assets	0.0		(2.9)		0		(2.9)
Restructuring charges					0		1.5
Taxes, other than income	57.0		57.4		171.2		174.1
Total expenses	722.0		742.1		2,101.8		2,214.4
Income from operations	189.4		159.7		491.4		498.5
Other income (expense)
Allowance for other funds used during construction	0.2		0.3		0.8		1.6
Other income	2.6		10.4		5.6		16.0
(Loss) on debt extinguishment					0		(33.0)
Income from equity investments	0		3.6		0		10.5
Total other income (expense)	2.8		14.3		6.4		(4.9)
Interest charges
Interest expense	50.8		57.5		154.9		175.8
Allowance for borrowed funds used during construction	(0.1)		(0.1)		(0.4)		(0.9)
Total interest charges	50.7	[1]	57.4	[1]	154.5	[1]	174.9	[1]
Income before provision for income taxes	141.5		116.6		343.3		318.7
Provision for income taxes	51.2		65.5		123.7		135.9
Net income	90.3		51.1		219.6		182.8
Less: Net income attributable to noncontrolling interest	(0.1)		(0.1)		(0.2)		(0.5)
Net income	$ 90.2		$ 51.0		$ 219.4		$ 182.3
Average common shares outstanding - Basic	213.8		212.8		213.5		212.5
Average common shares outstanding - Diluted	215.3		215.1		215.1		214.6
Earnings per share - Basic	$ 0.42		$ 0.24		$ 1.02		$ 0.85
Earnings per share - Diluted	$ 0.42		$ 0.24		$ 1.02		$ 0.85
Dividends paid per common share outstanding	$ 0.215		$ 0.205		$ 0.635		$ 0.610

[1] Segment net income is reported on a basis that includes internally allocated financing costs. Total interest charges include internally allocated interest costs that for January 2011 through September 2011 were at a pretax rate of 6.25%, for July 2010 through December 2010 were at a pretax rate of 6.50%, and for January 2010 through June 2010 were at a pretax rate of 7.15% based on an average of each subsidiary's equity and indebtedness to TECO Energy assuming a 50/50 debt/equity capital structure.