CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
OPERATING REVENUE
Total operating revenue	$ 1,392	$ 1,541
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	370	387
Selling, general and administrative	128	128
Operating expenses—affiliates	212	191
Depreciation and amortization	187	197
Total operating expenses	897	903
OPERATING INCOME	495	638
OTHER (EXPENSE) INCOME
Interest expense	(19)	(27)
Other income, net	1	1
Total other expense, net	(16)	(25)
INCOME BEFORE INCOME TAX EXPENSE	479	613
Income tax expense	126	159
NET INCOME	353	454
Affiliated entity
OTHER (EXPENSE) INCOME
Interest income - affiliate, net	2	1
Non-affiliate services
OPERATING REVENUE
Total operating revenue	846	981
Affiliate services
OPERATING REVENUE
Total operating revenue	$ 546	$ 560