CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
OPERATING REVENUE
Total operating revenue	$ 1,450	$ 1,618	$ 4,458	$ 4,906
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	416	427	1,207	1,249
Selling, general and administrative	118	138	362	361
Operating expenses - affiliates	225	176	600	536
Depreciation and amortization	207	217	607	640
Total operating expenses	966	958	2,776	2,786
OPERATING INCOME	484	660	1,682	2,120
OTHER (EXPENSE) INCOME
Interest expense	(23)	(28)	(75)	(84)
Other income, net	1	(1)	5	4
Total other expense, net	(17)	(43)	(63)	(135)
INCOME BEFORE INCOME TAXES	467	617	1,619	1,985
Income tax expense	126	158	426	506
NET INCOME	341	459	1,193	1,479
Affiliated entity
OTHER (EXPENSE) INCOME
Interest income	5	14	7	55
Non-affiliate services
OPERATING REVENUE
Total operating revenue	924	1,024	2,869	3,148
Affiliate services
OPERATING REVENUE
Total operating revenue	$ 526	$ 594	$ 1,589	$ 1,758