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Consolidated Balance Sheets - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment    
Utility Plant $ 22,780.8 $ 21,026.6
Accumulated depreciation and amortization (7,257.9) (6,953.6)
Net utility plant 15,522.9 14,073.0
Other property, at cost, less accumulated depreciation 19.6 286.5
Net Property, Plant and Equipment 15,542.5 14,359.5
Investments and Other Assets    
Unconsolidated affiliates 2.1 5.5
Other investments 204.0 204.1
Total Investments and Other Assets 206.1 209.6
Current Assets    
Cash and cash equivalents 112.8 29.0
Restricted cash 8.3 9.4
Accounts receivable (less reserve of $21.1 and $18.3, respectively) 1,058.5 898.9
Gas inventory 286.8 285.1
Materials and supplies, at average cost 101.0 105.9
Electric production fuel, at average cost 34.7 80.1
Exchange gas receivable 88.4 45.8
Regulatory assets 235.4 176.3
Prepayments and other 129.5 132.8
Total Current Assets 2,055.4 1,763.3
Other Assets    
Regulatory assets 2,002.1 1,624.9
Goodwill 1,690.7 1,690.7
Intangible assets 220.7 231.7
Deferred charges and other 86.5 82.0
Total Other Assets 4,000.0 3,629.3
Total Assets 21,804.0 19,961.7
Common Stockholders' Equity    
Common stock - $0.01 par value, 400,000,000 shares authorized; 372,363,656 and 337,015,806 shares outstanding, respectively 3.8 3.4
Preferred stock - $0.01 par value, 20,000,000 shares authorized; 420,000 shares outstanding 880.0 0.0
Treasury stock (99.9) (95.9)
Additional paid-in capital 6,403.5 5,529.1
Retained deficit (1,399.3) (1,073.1)
Accumulated other comprehensive loss [1] (37.2) (43.4)
Total Common Stockholders' Equity 5,750.9 4,320.1
Long-term debt, excluding amounts due within one year 7,105.4 7,512.2
Total Capitalization 12,856.3 11,832.3
Current Liabilities    
Current portion of long-term debt 50.0 284.3
Short-term borrowings 1,977.2 1,205.7
Accounts payable 883.8 625.6
Customer deposits and credits 238.9 262.6
Taxes accrued 222.7 208.1
Interest accrued 90.7 112.3
Risk management liabilities 5.0 43.2
Exchange gas payable 85.5 59.6
Regulatory liabilities 140.9 58.7
Legal and environmental 18.9 32.1
Accrued compensation and employee benefits 149.7 195.4
Claims accrued 114.7 12.5
Other accruals 58.8 78.3
Total Current Liabilities 4,036.8 3,178.4
Other Liabilities    
Risk management liabilities 46.7 28.5
Deferred income taxes 1,330.5 1,292.9
Deferred investment tax credits 11.2 12.4
Accrued insurance liabilities 84.4 80.1
Accrued liability for postretirement and postemployment benefits 389.1 337.1
Regulatory liabilities 2,519.1 2,736.9
Asset retirement obligations 352.0 268.7
Other noncurrent liabilities 177.9 194.4
Total Other Liabilities 4,910.9 4,951.0
Commitments and Contingencies (Refer to Note 18, Other Commitments and Contingencies) 0.0 0.0
Total Capitalization and Liabilities $ 21,804.0 $ 19,961.7
[1] All amounts are net of tax. Amounts in parentheses indicate debits.