CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
OPERATING ACTIVITIES
Net income	$ 284	$ 353
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	191	187
Deferred income taxes	8	(8)
Provision for uncollectible accounts	10	20
Changes in current assets and liabilities:
Accounts receivable	(7)	(30)
Accounts payable	(61)	(23)
Accrued income and other taxes	22	23
Other current assets and liabilities, net	(4)	(39)
Changes in other assets and liabilities, net	12	7
Changes in affiliate obligations, net	(12)	(14)
Other, net	10	(5)
Net cash provided by operating activities	453	471
INVESTING ACTIVITIES
Capital expenditures	(203)	(277)
Changes in advances to affiliates	658	0
Net increase in note receivable - affiliates	(900)	0
Proceeds from sale of property, plant and equipment and other assets	6	3
Net cash used in investing activities	(439)	(274)
FINANCING ACTIVITIES
Changes in advances from affiliates	0	(193)
Net cash used in financing activities	0	(193)
Net increase in cash, cash equivalents and restricted cash	14	4
Cash, cash equivalents and restricted cash at beginning of period	28	12
Cash, cash equivalents and restricted cash at end of period	42	16
Supplemental cash flow information:
Income taxes paid, net	(84)	(126)
Interest paid, including affiliate interest (net of capitalized interest of $10 and $19)	(25)	(21)
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	40	14
Restricted cash included in Other assets, net	2	2
Total	$ 42	$ 16