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Statements of Consolidated Balance Sheets - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Property, Plant and Equipment    
Utility Plant $ 19,856.9 $ 18,946.9
Accumulated depreciation and amortization (7,020.2) (6,853.4)
Net utility plant 12,836.7 12,093.5
Other property, at cost, less accumulated depreciation 17.1 18.0
Net Property, Plant and Equipment 12,853.8 12,111.5
Investments and Other Assets    
Unconsolidated affiliates 6.5 6.9
Other investments 200.5 187.7
Total Investments and Other Assets 207.0 194.6
Current Assets    
Cash and cash equivalents 16.1 15.5
Restricted Cash 13.8 29.7
Accounts receivable (less reserve of $19.1 and $20.3, respectively) 471.0 660.0
Gas inventory 323.6 343.5
Materials and supplies, at average cost 100.1 86.8
Electric production fuel, at average cost 110.0 106.3
Exchange gas receivable 16.9 21.0
Regulatory assets 262.9 206.9
Prepayments and other 64.1 107.5
Total Current Assets 1,378.5 1,577.2
Other Assets    
Regulatory assets 1,619.7 1,599.8
Goodwill 1,690.7 1,690.7
Intangible assets 245.4 253.7
Deferred charges and other 72.1 65.0
Total Other Assets 3,627.9 3,609.2
Total Assets 18,067.2 17,492.5
Common Stockholders' Equity    
Common stock - $0.01 par value, 400,000,000 shares authorized; 322,564,310 and 319,110,083 shares outstanding, respectively 3.3 3.2
Treasury stock (87.4) (79.3)
Additional paid-in capital 5,135.6 5,078.0
Retained deficit (1,060.9) (1,123.3)
Accumulated other comprehensive loss (179.0) (35.1)
Total Common Stockholders' Equity 3,811.6 3,843.5
Long-term debt, excluding amounts due within one year 6,096.2 5,948.5
Total Capitalization 9,907.8 9,792.0
Current Liabilities    
Current portion of long-term debt 582.6 433.7
Short-term borrowings 1,059.0 567.4
Accounts payable 352.2 433.4
Dividends payable 53.1 0.0
Customer deposits and credits 255.2 316.3
Taxes accrued 130.9 183.5
Interest accrued 71.1 129.0
Exchange gas payable 58.2 62.3
Regulatory liabilities 107.2 231.4
Legal and environmental 38.6 37.6
Accrued compensation and employee benefits 136.0 141.3
Other accruals 67.5 121.6
Total Current Liabilities 2,911.6 2,657.5
Other Liabilities and Deferred Credits    
Risk management liabilities 264.5 22.6
Deferred income taxes 2,384.2 2,365.3
Deferred investment tax credits 13.8 14.8
Deferred credits 95.2 90.7
Accrued liability for postretirement and postemployment benefits 738.2 759.7
Regulatory liabilities 1,296.8 1,350.4
Asset retirement obligations 272.3 254.0
Other noncurrent liabilities 182.8 185.5
Total Other Liabilities and Deferred Credits 5,247.8 5,043.0
Commitments and Contingencies 0.0 0.0
Total Capitalization and Liabilities $ 18,067.2 $ 17,492.5