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STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES      
Net income $ 268.9 $ 292.0 $ 292.6
Adjustments to reconcile net income to net cash provided from operating activities      
Depreciation and amortization 299.9 270.8 248.4
Deferred income taxes and investment tax credits 127.6 161.4 116.1
Allowance for equity funds used during construction (8.3) (4.2) (6.6)
Stock-based compensation expense 2.6 2.9 2.3
Regulatory assets (9.1) 4.6 26.8
Regulatory liabilities (27.5) (4.4) (32.5)
Other assets 10.1 (1.2) 10.0
Other liabilities 22.2 14.0 (6.2)
Change in certain current assets and liabilities      
Accounts receivable, net 15.7 (9.4) (17.9)
Accrued unbilled revenues 2.0 3.2 (1.3)
Fuel, materials and supplies inventories (56.2) 20.1 (2.3)
Fuel clause under recoveries 68.3 (42.1) (26.2)
Other current assets (16.0) (2.6) 2.7
Accounts payable 20.4 (66.4) 49.4
Accounts payable - affiliates 1.9 (1.5) 1.1
Income taxes payable - parent (16.7) (50.2) 2.9
Fuel clause over recoveries 61.3 (0.4) (108.8)
Other current liabilities 3.4 1.1 (5.4)
Net Cash Provided from Operating Activities 770.5 587.7 545.1
CASH FLOWS FROM INVESTING ACTIVITIES      
Capital expenditures (less allowance for equity funds used during construction) (551.6) (565.4) (797.6)
Proceeds from sale of assets 2.6 0.7 0.8
Net Cash Used in Investing Activities (549.0) (564.7) (796.8)
CASH FLOWS FROM FINANCING ACTIVITIES      
Proceeds from long-term debt 0.0 489.6 247.4
Dividends paid on common stock (120.0) (140.0) (120.0)
Payment of long-term debt (0.2) (140.2) (0.1)
Changes in advances with parent 101.3 232.4 (124.4)
Net Cash (Used in) Provided from Financing Activities (221.5) (23.0) 251.7
NET CHANGE IN CASH AND CASH EQUIVALENTS 0.0 0.0 0.0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 0.0 0.0 0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 0.0 $ 0.0 $ 0.0