Condensed Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue
Product revenue	$ 240	$ 294	$ 737	$ 867
Service revenue	366	373	1,074	1,104
Total revenue	606	667	1,811	1,971
Costs and operating expenses
Cost of products	98	119	300	316
Cost of services	201	198	600	601
Selling, general and administrative expenses	179	181	553	557
Research and development costs	51	46	173	152
Impairment of goodwill	0	0	340	0
Total costs and operating expenses	529	544	1,966	1,626
Income (loss) from operations	77	123	(155)	345
Other income (expense), net	33	0	46	(8)
Income (loss) before income taxes	110	123	(109)	337
Income tax expense	32	29	56	88
Net income (loss)	$ 78	$ 94	$ (165)	$ 249
Net income (loss) per weighted average common share
Basic (in dollars per share)	$ 0.56	$ 0.61	$ (1.16)	$ 1.59
Diluted (in dollars per share)	$ 0.55	$ 0.60	$ (1.16)	$ 1.57
Weighted average common shares outstanding
Basic (in shares)	139.2	154.5	142.1	156.6
Diluted (in shares)	141.4	157.1	142.1	159.1