CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
OPERATING ACTIVITIES
Net income	$ 737	$ 1,096
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	527	557
Deferred income taxes	24	(23)
Provision for uncollectible accounts	26	35
Changes in current assets and liabilities:
Accounts receivable	(17)	9
Accounts payable	(30)	(16)
Accrued income and other taxes	7	12
Other current assets and liabilities, net	81	(6)
Changes in other assets and liabilities, net	28	30
Changes in affiliate obligations, net	(37)	(41)
Other, net	14	(7)
Net cash provided by operating activities	1,360	1,646
INVESTING ACTIVITIES
Capital expenditures	(582)	(776)
Changes in advances to affiliates	393
Changes in advances to affiliates		(576)
Net increase in note receivable - affiliates	(937)	0
Proceeds from sale of property, plant and equipment and other assets	12	6
Net cash used in investing activities	(1,114)	(1,346)
FINANCING ACTIVITIES
Payments of long-term debt	(237)	(227)
Changes in advances from affiliates	0	(61)
Net cash used in financing activities	(237)	(288)
Net increase in cash, cash equivalents and restricted cash	9	12
Cash, cash equivalents and restricted cash at beginning of period	28	12
Cash, cash equivalents and restricted cash at end of period	37	24
Supplemental cash flow information:
Income taxes paid, net	(222)	(393)
Interest paid, including affiliate interest (net of capitalized interest of $27 and $60)	(75)	(47)
Supplemental noncash information regarding financing activities:
Repayment of long-term debt in exchange for reductions of advances from affiliates	0	215
Cash, cash equivalents, and restricted cash:
Cash and cash equivalents	36	22
Restricted cash included in Other assets, net	1	2
Total	$ 37	$ 24