CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
OPERATING REVENUE
Operating revenues	$ 1,990	$ 1,971	$ 5,964	$ 5,935
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	897	857	2,643	2,623
Selling, general and administrative	305	300	872	922
Operating expenses - affiliates	116	101	354	274
Depreciation and amortization	431	429	1,304	1,250
Total operating expenses	1,749	1,687	5,173	5,069
OPERATING INCOME	241	284	791	866
OTHER (EXPENSE) INCOME
Interest income - affiliate	16	13	49	39
Interest expense	(90)	(99)	(272)	(301)
Other (expense) income, net	(9)	41	1	29
Total other expense, net	(83)	(45)	(222)	(233)
INCOME BEFORE INCOME TAXES	158	239	569	633
Income tax expense	37	42	150	147
NET INCOME	121	197	419	486
Non-Affiliate Revenue
OPERATING REVENUE
Operating revenues	1,934	1,918	5,797	5,782
Affiliate Services
OPERATING REVENUE
Operating revenues	$ 56	$ 53	$ 167	$ 153