Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Revenues	$ 1,016	$ 1,112	$ 2,067	$ 2,270
Operating Costs and Expenses
Cost of services (excluding depreciation and amortization)	795	879	1,627	1,785
Selling, general and administrative (excluding depreciation and amortization)	111	121	227	248
Research and development (excluding depreciation and amortization)	0	2	1	5
Depreciation and amortization	115	112	232	227
Restructuring and related costs	29	26	36	42
Interest expense	15	20	32	40
Goodwill impairment	0	1,067	0	1,351
(Gain) loss on divestitures and transaction costs	2	2	6	16
Litigation costs (recoveries), net	14	1	20	13
Other (income) expenses, net	(1)	1	1	0
Total Operating Costs and Expenses	1,080	2,231	2,182	3,727
Income (Loss) before Income Taxes	(64)	(1,119)	(115)	(1,457)
Income tax expense (benefit)	(13)	(90)	(15)	(120)
Net (Loss) Income	$ (51)	$ (1,029)	$ (100)	$ (1,337)
Earnings Per Share, Basic	$ (0.25)	$ (4.94)	$ (0.50)	$ (6.44)
Earnings Per Share, Diluted	$ (0.25)	$ (4.94)	$ (0.50)	$ (6.44)