Consolidated Condensed Statements of Cash Flows (Unaudited) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating Activities
Net Income	$ 410.2	$ 330.6
Reconciliation to cash
Depreciation and amortization	248.9	237.6
Amortization of gain	0	(151.8)
Equity in earnings of transmission affiliate	(46.4)	(45.5)
Distributions from transmission affiliate	37.0	37.0
Deferred income taxes and investment tax credits, net	215.9	(1.0)
Deferred revenue	2.9	78.0
Contributions to qualified benefit plans	(257.4)	0
Change in -
Accounts receivable and accrued revenues	136.4	111.4
Inventories	11.1	(44.2)
Other current assets	(18.7)	37.8
Accounts payable	(41.8)	(39.8)
Accrued income taxes, net	69.1	2.3
Deferred costs, net	19.4	19.5
Other current liabilities	27.1	51.0
Other, net	13.9	30.8
Cash Provided by Operating Activities	827.6	653.7
Investing Activities
Capital expenditures	(612.2)	(545.6)
Investment in transmission affiliate	(6.6)	(3.9)
Proceeds from asset sales	38.5	63.8
Change in restricted cash	(37.2)	131.8
Other, net	(32.8)	(56.1)
Cash Used in Investing Activities	(650.3)	(410.0)
Financing Activities
Proceeds from Stock Options Exercised	34.4	76.0
Purchase of common stock	(135.1)	(128.5)
Dividends paid on common stock	(182.0)	(140.3)
Issuance of long-term debt	720.0	530.0
Retirement and repurchase of long-term debt	(464.7)	(289.9)
Change in short-term debt	(161.2)	(306.5)
Other, net	1.9	6.5
Cash Used in Financing Activities	(186.7)	(252.7)
Change in Cash and Cash Equivalents	(9.4)	(9.0)
Cash and Cash Equivalents at Beginning of Period	24.5	20.2
Cash and Cash Equivalents at End of Period	$ 15.1	$ 11.2