Consolidated Condensed Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities
Net Income	$ 340.6	$ 295.6
Reconciliation to cash
Depreciation and amortization	206.5	197.7
Deferred income taxes and investment tax credits, net	188.0	143.1
Contributions to qualified benefit plans	0
Change in -
Accounts receivable and accrued revenues	132.0	49.3
Inventories	25.1	42.8
Other current assets	11.8	13.8
Accounts payable	(52.6)	(86.6)
Accrued income taxes, net	(10.6)	16.2
Other current liabilities	(21.6)	(2.9)
Other, net	(97.9)	12.5
Cash Provided by Operating Activities	721.3	681.5
Investing Activities
Capital expenditures	(305.5)	(307.3)
Investment in transmission affiliate	(7.9)	(5.2)
Other, net	0.5	(24.1)
Cash Used in Investing Activities	(312.9)	(336.6)
Financing Activities
Exercise of stock options	17.6	40.7
Purchase of common stock	(57.3)	(135.7)
Dividends paid on common stock	(176.0)	(155.6)
Issuance of long-term debt	250.0	250.0
Retirement of long-term debt	(311.1)	(310.5)
Change in short-term debt	(127.3)	(58.7)
Other, net	3.1	10.3
Cash Used in Financing Activities	(401.0)	(359.5)
Change in Cash and Cash Equivalents	7.4	(14.6)
Cash and Cash Equivalents at Beginning of Period	26.0	35.6
Cash and Cash Equivalents at End of Period	$ 33.4	$ 21.0