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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Operating activities    
Net income $ 444.8 $ 463.1
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 452.2 409.8
Deferred income taxes 24.1 66.6
Amortization of investment tax credits (1.9) (2.1)
Allowance for equity funds used during construction (12.9) (40.9)
Net realized and unrealized hedging and derivative transactions 64.5 (9.9)
Changes in operating assets and liabilities:    
Accounts receivable 13.1 (0.7)
Accrued unbilled revenues 84.8 60.1
Inventories (15.1) 13.6
Prepayments and other (12.4) 12.6
Accounts payable (96.0) 25.3
Net regulatory assets and liabilities 72.3 (23.6)
Other current liabilities (66.3) (87.7)
Pension and other employee benefit obligations (44.4) (29.0)
Other, net (72.4) (19.8)
Net cash provided by operating activities 834.4 837.4
Investing activities    
Utility capital/construction expenditures (1,098.6) (1,190.7)
Investments in utility money pool arrangement (397.0) (578.0)
Repayments from utility money pool arrangement 397.0 575.0
Net cash used in investing activities (1,098.6) (1,193.7)
Financing activities    
Repayments of short-term borrowings, net (307.0) 0.0
Borrowings under utility money pool arrangement 58.0 526.0
Repayments under utility money pool arrangement (58.0) (526.0)
Proceeds from issuance of long-term debt 928.6 691.4
Repayments of long-term debt 400.0 300.0
Capital contributions from parent 632.7 246.8
Dividends paid to parent (295.4) (271.9)
Other, net 0.0 (0.1)
Net cash provided by financing activities 558.9 366.2
Net change in cash and cash equivalents 294.7 9.9
Cash and cash equivalents at beginning of period 33.4 7.5
Cash and cash equivalents at end of period 328.1 17.4
Supplemental disclosure of cash flow information:    
Cash paid for interest (net of amounts capitalized) (173.4) (145.3)
Cash paid for income taxes, net (43.7) (86.4)
Supplemental disclosure of non-cash investing and financing transactions:    
Accrued property, plant and equipment additions 228.5 135.0
Inventory transfers to property, plant and equipment 24.4 29.8
Operating lease right-of-use assets 653.8 0.0
Allowance for equity funds used during construction $ 12.9 $ 40.9