Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Revenues	$ 1,098	$ 1,304	$ 3,368	$ 4,111
Operating Costs and Expenses
Cost of services (excluding depreciation and amortization)	859	1,005	2,644	3,193
Selling, general and administrative (excluding depreciation and amortization)	112	139	360	427
Research and development (excluding depreciation and amortization)	1	2	6	7
Depreciation and amortization	115	113	342	345
Restructuring and related costs	8	31	50	68
Interest expense	20	22	60	92
(Gain) Loss on Extinguishment of Debt	0	108	0	108
Goodwill impairment	0	0	1,351	0
(Gain) loss on divestitures and transaction costs	3	54	19	9
Litigation costs (recoveries), net	2	78	15	113
Other (income) expenses, net	(8)	4	(8)	1
Total Operating Costs and Expenses	1,112	1,556	4,839	4,363
Income (Loss) before Income Taxes	(14)	(252)	(1,471)	(252)
Income tax expense (benefit)	2	(15)	(118)	24
Net (Loss) Income	$ (16)	$ (237)	$ (1,353)	$ (276)
Earnings Per Share, Basic	$ (0.09)	$ (1.16)	$ (6.52)	$ (1.38)
Earnings Per Share, Diluted	$ (0.09)	$ (1.16)	$ (6.52)	$ (1.38)
Revenues	$ 1,098	$ 1,304	$ 3,368	$ 4,111