CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
OPERATING REVENUE
Total operating revenue	$ 1,161	$ 1,363	$ 3,589	$ 4,144
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	379	389	1,096	1,132
Selling, general and administrative	156	111	356	357
Operating expenses—affiliates	221	182	602	575
Depreciation and amortization	162	183	527	557
Total operating expenses	918	865	2,581	2,621
OPERATING INCOME	243	498	1,008	1,523
OTHER (EXPENSE) INCOME
Interest expense	(25)	(11)	(71)	(44)
Other income, net	3	2	8	1
Total other income (expense), net	4	(1)	0	(29)
INCOME BEFORE INCOME TAX EXPENSE	247	497	1,008	1,494
Income tax expense	71	132	271	398
NET INCOME	176	365	737	1,096
Non-affiliates
OPERATING REVENUE
Total operating revenue	684	793	2,148	2,468
Affiliates
OPERATING REVENUE
Total operating revenue	477	570	1,441	1,676
OTHER (EXPENSE) INCOME
Interest income—affiliate, net	$ 26	$ 8	$ 63	$ 14