CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
OPERATING REVENUE
Total operating revenue	$ 5,508	$ 5,915	$ 6,449
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	1,505	1,608	1,646
Selling, general and administrative	438	478	454
Operating expenses - affiliates	761	796	734
Depreciation and amortization	753	823	860
Goodwill impairment	0	2,405	0
Total operating expenses	3,457	6,110	3,694
OPERATING INCOME (LOSS)	2,051	(195)	2,755
OTHER EXPENSE
Interest expense	(62)	(95)	(112)
Other income, net	1	5	7
Total other expense, net	(37)	(75)	(165)
INCOME (LOSS) BEFORE INCOME TAXES	2,014	(270)	2,590
Income tax expense	527	561	671
NET INCOME (LOSS)	1,487	(831)	1,919
Affiliated Entity
OPERATING REVENUE
Total operating revenue	2,249	2,159	2,294
OTHER EXPENSE
Interest income (expense) - affiliate, net	24	15
Interest income (expense) - affiliate, net			(60)
Non-Affiliate Services
OPERATING REVENUE
Total operating revenue	3,259	3,756	4,155
Affiliate Services
OPERATING REVENUE
Total operating revenue	$ 2,249	$ 2,159	$ 2,294