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Statement of Cash Flows (Unaudited) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
OPERATING ACTIVITIES:    
Net income $ 676,800 $ 628,413
Adjustments to reconcile net cash provided (used) by operating activities:    
Depreciation and amortization 265,207 252,935
Allowance for equity funds used during construction (equity AFUDC) (41,037) (27,296)
Regulatory credit resulting from tax rate changes (15,376) (15,376)
Changes in current assets and liabilities:    
Affiliate receivables 385 2,226
Trade and other accounts receivable 29,135 34,721
Transportation and exchange gas receivables (3,425) (12,472)
Inventories 523 9,176
Regulatory assets 5,645 15,674
Other current assets 2,595 24,145
Affiliate payables (15,928) (10,919)
Trade accounts payable 4,227 (50,304)
Transportation and exchange gas payables (2,175) 8,401
Accrued liabilities 11,769 29,584
Other, including changes in long-term assets and liabilities (39,844) (10,035)
Net cash provided (used) by operating activities 878,501 878,873
FINANCING ACTIVITIES:    
Proceeds from other financing obligations 1,605 4,547
Payments on other financing obligations (15,391) (13,840)
Cash distributions to parent (650,000) (620,000)
Net cash provided (used) by financing activities (663,786) (629,293)
Property, plant and equipment:    
Capital expenditures (512,465) (312,521)
Contributions and advances for construction costs, net 10,916 15,880
Disposal of property, plant and equipment, net (40,820) (20,513)
Advances to affiliate, net 326,246 73,973
Purchase of ARO Trust investments (10,885) (10,830)
Proceeds from sale of ARO Trust investments 12,293 4,431
Net cash provided (used) by investing activities (214,715) (249,580)
Increase (decrease) in cash 0 0
Cash at beginning of period 0 0
Cash at end of period 0 0
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]    
Increases to property, plant and equipment, exclusive of equity AFUDC (579,063) (377,371)
Changes in related accounts payable and accrued liabilities 66,598 64,850
Capital expenditures $ (512,465) $ (312,521)