Consolidated Condensed Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment
In service	$ 14,424.9	$ 14,238.8
Accumulated depreciation	(4,140.3)	(4,036.0)
Property, Plant and Equipment in Service, Net	10,284.6	10,202.8
Construction work in progress	369.2	315.9
Leased facilities, net	50.7	53.5
Net Property, Plant and Equipment	10,704.5	10,572.2
Investments
Equity investment in transmission affiliate	390.6	378.3
Other	38.2	35.5
Total Investments	428.8	413.8
Current Assets
Cash and cash equivalents	21.0	35.6
Accounts receivable, net	327.3	285.3
Accrued revenues	174.4	278.1
Materials, supplies and inventories	317.9	360.7
Prepayments and other	430.5	354.2
Total Current Assets	1,271.1	1,313.9
Deferred Charges and Other Assets
Regulatory assets	1,285.6	1,339.0
Goodwill	441.9	441.9
Other	185.1	204.2
Total Deferred Charges and Other Assets	1,912.6	1,985.1
Total Assets	14,317.0	14,285.0
Capitalization
Common equity	4,195.4	4,135.1
Preferred stock of subsidiary	30.4	30.4
Long-term debt	4,383.2	4,453.8
Total Capitalization	8,609.0	8,619.3
Current Liabilities
Long-term debt due currently	414.6	412.1
Short-term debt	335.9	394.6
Accounts payable	276.4	368.4
Accrued payroll and benefits	75.5	100.9
Other	178.3	167.3
Total Current Liabilities	1,280.7	1,443.3
Deferred Credits and Other Liabilities
Regulatory liabilities	854.1	866.5
Deferred income taxes - long-term	2,369.7	2,117.0
Deferred revenue, net	689.6	709.7
Pension and other benefit obligations	225.2	244.0
Other	288.7	285.2
Total Deferred Credits and Other Liabilities	4,427.3	4,222.4
Total Capitalization and Liabilities	$ 14,317.0	$ 14,285.0