CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
OPERATING REVENUE
Total operating revenue	$ 1,222	$ 1,392
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	354	370
Selling, general and administrative	104	128
Operating expenses—affiliates	185	212
Depreciation and amortization	191	187
Total operating expenses	834	897
OPERATING INCOME	388	495
OTHER (EXPENSE) INCOME
Interest expense	(22)	(19)
Other income, net	4	1
Total other expense, net	(5)	(16)
INCOME BEFORE INCOME TAX EXPENSE	383	479
Income tax expense	99	126
NET INCOME	284	353
Non-affiliates
OPERATING REVENUE
Total operating revenue	740	846
Affiliates
OPERATING REVENUE
Total operating revenue	482	546
OTHER (EXPENSE) INCOME
Interest income—affiliate, net	$ 13	$ 2