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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Cash flows from operating activities      
Net income (loss) $ 1,119 $ 685 $ 1,233
Adjustments to reconcile net income (loss) to net cash provided by operating activities      
Depreciation and amortization (including amortization of debt issuance costs and premiums/discounts) 2,554 1,763 1,882
Amortization of nuclear fuel cost 382 341 287
Non-cash retirement benefit expense 324 837 327
Prepayment credits applied to revenue (100) (100) (100)
Fuel cost adjustment deferral (30) 98 (83)
Fuel cost tax equivalents 7 (5) (16)
Changes in current assets and liabilities      
Accounts receivable, net (68) 230 (83)
Inventories and other current assets, net 65 1 50
Accounts payable and accrued liabilities 134 (119) (4)
Accrued interest (36) (17) (3)
Regulatory asset costs (13) (50) (31)
Pension contributions (304) (805) (281)
Settlements of asset retirement obligations (106) (123) (139)
Other, net 41 (10) 3
Net cash provided by operating activities 3,955 2,736 3,042
Cash flows from investing activities      
Construction expenditures (1,759) (2,153) (2,710)
Nuclear fuel expenditures (457) (305) (300)
Purchases of investments (49) (49) (50)
Loans and other receivables      
Advances (12) (11) (10)
Repayments 4 8 7
Other, net 4 (26) (50)
Net cash used in investing activities (2,269) (2,536) (3,113)
Long-term debt      
Issues of power bonds 998 999 0
Redemptions and repurchases of power bonds (1,731) (1,558) (76)
Redemptions of notes payable (53) (27) 0
Payments on debt of variable interest entities (36) (35) (33)
Short-term debt issues (redemptions), net (811) 583 370
Payments on leases and leasebacks (42) (136) (159)
Financing costs, net (3) (4) 0
Payments to U.S. Treasury (5) (5) (6)
Other, net (4) (17) (25)
Net cash (used in) provided by financing activities (1,687) (200) 71
Net change in cash and cash equivalents (1) 0 0
Cash and cash equivalents at beginning of the year 300 300 300
Cash and cash equivalents at end of the year $ 299 $ 300 $ 300