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Statement of Cash Flows (Unaudited) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
OPERATING ACTIVITIES:    
Net income $ 628,413 $ 553,988
Adjustments to reconcile net cash provided (used) by operating activities:    
Depreciation and amortization 252,935 263,232
Allowance for equity funds used during construction (equity AFUDC) (27,296) (8,555)
Regulatory credit resulting from tax rate changes (15,376) (15,376)
Changes in current assets and liabilities:    
Affiliate receivables 2,226 (1,753)
Trade and other accounts receivable 34,721 16,255
Transportation and exchange gas receivables (12,472) (5,826)
Inventories 9,176 (16,644)
Regulatory assets 15,674 (11,321)
Other current assets 24,145 8,512
Affiliate payables (10,919) (16,776)
Trade accounts payable (50,304) (9,122)
Transportation and exchange gas payables 8,401 (1,550)
Accrued liabilities 29,584 (6,400)
Other, including changes in long-term assets and liabilities (10,035) (11,571)
Net cash provided (used) by operating activities 878,873 737,093
FINANCING ACTIVITIES:    
Proceeds from other financing obligations 4,547 5,148
Payments on other financing obligations (13,840) (12,412)
Payments for debt issuance costs 0 (16)
Cash distributions to parent (620,000) (307,548)
Cash contributions from parent 0 128,000
Net cash provided (used) by financing activities (629,293) (186,828)
Property, plant and equipment:    
Capital expenditures (312,521) (185,045)
Contributions and advances for construction costs, net 15,880 (2,279)
Disposal of property, plant and equipment, net (20,513) (14,028)
Advances to affiliate, net 73,973 (340,945)
Purchase of ARO Trust investments (10,830) (10,127)
Proceeds from sale of ARO Trust investments 4,431 2,159
Net cash provided (used) by investing activities (249,580) (550,265)
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 (377,371) (187,384)
Changes in related accounts payable and accrued liabilities 64,850 2,339
Capital expenditures $ (312,521) $ (185,045)