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CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 263.9 $ 238.3
Adjustments to reconcile net income to net cash provided from operating activities    
Depreciation and amortization 204.6 235.9
Deferred income taxes and investment tax credits, net 120.5 92.6
Allowance for equity funds used during construction (27.2) (9.2)
Stock-based compensation expense 1.9 1.7
Regulatory assets 10.9 (10.5)
Regulatory liabilities (0.6) (9.8)
Other assets 1.6 13.5
Other liabilities (58.1) (16.6)
Change in certain current assets and liabilities    
Accounts receivable, net (88.5) (49.1)
Accrued unbilled revenues (10.1) (17.5)
Fuel, materials and supplies inventories 4.0 30.9
Fuel clause under recoveries 15.8 (0.5)
Other current assets 24.8 (12.3)
Accounts payable (29.7) (72.8)
Income taxes payable - parent 1.7 9.2
Fuel clause over recoveries 0.0 (59.9)
Other current liabilities (51.1) 21.9
Net cash provided from operating activities 384.4 385.8
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (less allowance for equity funds used during construction) (662.8) (466.7)
Proceeds from sale of assets 0.4 0.3
Net cash used in investing activities (662.4) (466.4)
CASH FLOWS FROM FINANCING ACTIVITIES    
Dividends paid on common stock (65.0) (90.0)
Proceeds from long-term debt 592.3 0.0
Payment of long-term debt (125.1) (110.1)
Changes in advances with parent (124.2) 280.7
Net cash provided from financing activities 278.0 80.6
NET CHANGE IN CASH AND CASH EQUIVALENTS 0.0 0.0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 0.0 0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 0.0 $ 0.0