Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING REVENUE
Operating revenues	$ 2,046	$ 2,087
OPERATING EXPENSES
Cost of services and products (exclusive of depreciation and amortization)	967	998
Selling, general and administrative	328	344
Operating expenses - affiliates	46	53
Depreciation and amortization	390	431
Goodwill impairment	3,708	0
Total operating expenses	5,439	1,826
OPERATING (LOSS) INCOME	(3,393)	261
OTHER INCOME (EXPENSE)
Interest income - affiliate	16	16
Interest expense	(131)	(120)
Other income, net	12	7
Total other income (expense), net	(103)	(97)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE	(3,496)	164
Income tax expense	89	102
NET (LOSS) INCOME	(3,585)	62
Non-Affiliate Revenue
OPERATING REVENUE
Operating revenues	1,991	2,062
Affiliate Revenues
OPERATING REVENUE
Operating revenues	$ 55	$ 25