CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
OPERATING REVENUE
Total operating revenue	$ 1,799	$ 2,028	$ 3,717	$ 4,058
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	490	565	963	1,147
Selling, general and administrative	139	157	282	314
Operating expenses - affiliates	164	219	359	414
Depreciation and amortization	327	337	655	673
Total operating expenses	1,120	1,278	2,259	2,548
OPERATING INCOME	679	750	1,458	1,510
OTHER (EXPENSE) INCOME
Interest expense	(75)	(96)	(150)	(191)
Interest expense - affiliates, net	(16)	(15)	(32)	(31)
Other (expense) income, net	(5)	5	(13)	14
Total other expense, net	(96)	(106)	(195)	(208)
INCOME BEFORE INCOME TAXES	583	644	1,263	1,302
Income tax expense	153	167	330	338
NET INCOME	430	477	933	964
Non-affiliate services
OPERATING REVENUE
Total operating revenue	1,207	1,308	2,442	2,616
Affiliate Services
OPERATING REVENUE
Total operating revenue	$ 592	$ 720	$ 1,275	$ 1,442