Condensed Consolidated Income Statements (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenues	$ 1,296	$ 1,287	$ 3,878	$ 3,821
Cost of revenue	787	782	2,369	2,337
Gross profit	509	505	1,509	1,484
Selling, general and administrative expenses	273	279	870	868
Research and development expenses	44	46	142	137
Restructuring and asset impairment charges	33	4	58	19
Goodwill impairment charge	148	0	148	0
Operating income	11	176	291	460
Interest expense	16	21	52	63
Other non-operating (expense) income, net	(7)	4	(2)	9
Gain from sale of business	0	2	1	0
(Loss) income before taxes	(12)	161	238	406
Income tax (benefit) expense	(77)	31	(45)	82
Net income	$ 65	$ 130	$ 283	$ 324
Earnings per share:
Basic (usd per share)	$ 0.36	$ 0.73	$ 1.57	$ 1.80
Diluted (usd per share)	$ 0.36	$ 0.72	$ 1.56	$ 1.79
Weighted average number of shares:
Basic (in shares)	180,072	179,676	179,938	179,788
Diluted (in shares)	181,212	181,090	181,159	181,166