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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Cash Flows From Operating Activities:    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ (1,103) $ 128
Adjustments to reconcile net income to net cash provided from operating activities:    
Asset Impairment Charges 262 4
Provision for rate credits 985  
Deferred Income Tax Expense (Benefit) (416) 39
Depreciation and amortization 104 84
Amortization of nuclear fuel 14 13
Cash provided (used) by changes in certain assets and liabilities:    
Increase (Decrease) in Receivables 68 41
Increase (Decrease) in Due from Affiliates, Current 0 (6)
Increase (Decrease) in Inventories (23) (9)
increase (Decrease) in Prepaid Expense 13 8
Increase (Decrease) in Other Regulatory Assets 180 (6)
Increase (Decrease) in Regulatory liabilities 202 (112)
Increase (Decrease ) in Accounts payable (75) (15)
Customer Refundable Fees, Revenue Recognized (66)  
Increase (Decrease) in Due to Affiliate, Current 3 (5)
Increase (Decrease) in Taxes accrued (106) (150)
Other Operating Activities, Cash Flow Statement (1) (4)
Changes in other assets (128) (112)
Changes in other liabilities (36) 95
Net Cash Provided From Operating Activities (123) (7)
Cash Flows From Investing Activities:    
Property additions and construction expenditures (120) (159)
Proceeds from investments (including derivative collateral posted) 7 25
Purchase of investments (including derivative collateral posted) (10) (10)
Payments to Acquire Interest in Subsidiaries and Affiliates 0 (111)
Payments for (Proceeds from) Hedge, Financing Activities 0 115
Investment In Affiliate 353 (121)
Net Cash Used For Investing Activities 230 (261)
Proceeds from Issuance of Long-term Debt   100
Cash Flows From Financing Activities:    
Repayments of Long-term Debt (1,210) (8)
Dividends (29) (82)
Short-term borrowings-affiliate,net 273 159
Proceeds from Contributions from Parent 675  
Short-term borrowings, net (73) (106)
Proceeds from Issuance of Debt 0  
Net Cash (Used For) Provided From Financing Activities (364) 63
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect (257) (205)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents January 1 377 395
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, March 31 120 190
Noncash Investing and Financing Activities:    
Accrued construction expenditures 25 21
Capital Lease Obligations Incurred