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CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 307.2 $ 263.9
Adjustments to reconcile net income to net cash provided from operating activities:    
Depreciation and amortization 240.8 204.6
Deferred income taxes and investment tax credits, net 57.2 120.5
Allowance for equity funds used during construction (20.0) (27.2)
Stock-based compensation expense 3.4 1.9
Regulatory assets 4.8 (10.9)
Regulatory liabilities (3.7) (0.6)
Other assets 2.0 1.6
Other liabilities (0.3) (58.1)
Change in certain current assets and liabilities:    
Accounts receivable and accrued unbilled revenues, net (56.8) (98.6)
Fuel, materials and supplies inventories 14.9 4.0
Fuel recoveries 37.5 15.8
Other current assets 25.3 24.8
Accounts payable (37.9) (29.7)
Income taxes payable - parent (22.5) 1.7
Other current liabilities 75.2 (51.1)
Net cash provided from operating activities 617.5 384.4
CASH FLOWS FROM INVESTING ACTIVITIES    
Capital expenditures (less allowance for equity funds used during construction) (413.8) (662.8)
Proceeds from sale of assets 0.0 0.4
Net cash used in investing activities (413.8) (662.4)
CASH FLOWS FROM FINANCING ACTIVITIES    
Dividends paid on common stock 0.0 (65.0)
Proceeds from long-term debt 396.0 592.3
Payment of long-term debt (250.0) (125.1)
Changes in advances with parent (349.7) (124.2)
Net cash (used in) provided from financing activities (203.7) 278.0
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