CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
OPERATING REVENUE
Total operating revenue	$ 1,389	$ 1,467	$ 2,781	$ 3,008
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	373	404	743	791
Selling, general and administrative	118	116	246	244
Operating expenses—affiliates	181	184	393	375
Depreciation and amortization	187	203	374	400
Total operating expenses	859	907	1,756	1,810
OPERATING INCOME	530	560	1,025	1,198
OTHER (EXPENSE) INCOME
Interest expense	(14)	(25)	(33)	(52)
Other (expense) income, net	(2)	3	(1)	4
Total other expense, net	(12)	(21)	(28)	(46)
INCOME BEFORE INCOME TAX EXPENSE	518	539	997	1,152
Income tax expense	140	141	266	300
NET INCOME	378	398	731	852
Affiliated entity
OTHER (EXPENSE) INCOME
Interest income - affiliate, net	4	1	6	2
Non-affiliate services
OPERATING REVENUE
Total operating revenue	829	964	1,675	1,945
Affiliate services
OPERATING REVENUE
Total operating revenue	$ 560	$ 503	$ 1,106	$ 1,063