CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
OPERATING ACTIVITIES
Net income	$ 353	$ 454
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	187	197
Deferred income taxes	(8)	(10)
Provision for uncollectible accounts	20	13
Changes in current assets and liabilities:
Accounts receivable	(30)	(42)
Accounts payable	(23)	6
Accrued income and other taxes	23	27
Other current assets and liabilities, net	(39)	(34)
Changes in other noncurrent assets and liabilities, net	7	(4)
Changes in affiliate obligations, net	(14)	(16)
Other, net	(5)	5
Net cash provided by operating activities	471	596
INVESTING ACTIVITIES
Capital expenditures	(277)	(196)
Changes in advances to affiliates	0	(402)
Proceeds from sale of property, plant and equipment and other assets	3	0
Net cash used in investing activities	(274)	(598)
FINANCING ACTIVITIES
Payments of long-term debt	0	(2)
Changes in advances from affiliates	(193)	0
Net cash used in financing activities	(193)	(2)
Net increase (decrease) in cash, cash equivalents and restricted cash	4	(4)
Cash, cash equivalents and restricted cash at beginning of period	12	10
Cash, cash equivalents and restricted cash at end of period	16	6
Supplemental cash flow information:
Income taxes paid, net	(126)	(161)
Interest paid, including affiliate interest (net of capitalized interest of $19 and $10)	(21)	(30)
Repayment of long-term debt in exchange for advances from affiliates	215	0
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	14	4
Restricted cash - noncurrent	2	2
Total	$ 16	$ 6