Consolidated Condensed Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment
In service	$ 15,580.3	$ 15,509.0
Accumulated depreciation	(4,560.8)	(4,485.1)
Property, Plant and Equipment in Service, Net	11,019.5	11,023.9
Construction work in progress	255.8	191.8
Leased facilities, net	40.7	42.0
Net Property, Plant and Equipment	11,316.0	11,257.7
Investments
Equity investment in transmission affiliate	431.1	424.1
Other	33.0	32.8
Total Investments	464.1	456.9
Current Assets
Cash and cash equivalents	65.2	61.9
Accounts receivable, net	437.3	352.1
Accrued revenues	221.6	291.3
Materials, supplies and inventories	289.7	400.6
Current deferred tax asset, net	170.3	242.7
Prepayments and other	142.3	186.8
Total Current Assets	1,326.4	1,535.4
Deferred Charges and Other Assets
Regulatory assets	1,270.0	1,271.2
Goodwill	441.9	441.9
Other	317.2	200.3
Total Deferred Charges and Other Assets	2,029.1	1,913.4
Total Assets	15,135.6	15,163.4
Capitalization
Common equity	4,510.6	4,419.7
Preferred stock of subsidiary	30.4	30.4
Long-term debt	4,169.2	4,186.4
Total Capitalization	8,710.2	8,636.5
Current Liabilities
Long-term debt due currently	426.8	424.1
Short-term debt	563.0	617.6
Accounts payable	291.9	363.3
Accrued payroll and benefits	58.8	95.1
Other	219.8	168.6
Total Current Liabilities	1,560.3	1,668.7
Deferred Credits and Other Liabilities
Regulatory liabilities	820.3	830.6
Deferred income taxes - long-term	2,942.4	2,906.7
Deferred revenue, net	604.7	614.1
Pension and other benefit obligations	203.5	203.8
Other	294.2	303.0
Total Deferred Credits and Other Liabilities	4,865.1	4,858.2
Total Capitalization and Liabilities	$ 15,135.6	$ 15,163.4