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Consolidated Statements of Income (Loss) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenue      
Product revenue $ 889 $ 1,057 $ 1,227
Service revenue 1,433 1,473 1,505
Total revenue 2,322 2,530 2,732
Costs and operating expenses      
Cost of products 352 440 443
Cost of services 782 814 810
Selling, general and administrative expenses 664 765 770
Research and development expenses 212 228 206
Impairment of goodwill, acquired intangibles and other assets 80 478 0
Total costs and operating expenses 2,090 2,725 2,229
Income (loss) from operations 232 (195) 503
Interest expense (12) (9) (3)
Other income (expense), net 1 60 (6)
Total other (expense) income, net (11) 51 (9)
Income (loss) before income taxes 221 (144) 494
Income tax expense 96 70 127
Net income (loss) $ 125 $ (214) $ 367
Net income (loss) per common share      
Basic (in usd per share) $ 0.96 $ (1.53) $ 2.36
Diluted (in usd per share) $ 0.95 $ (1.53) $ 2.33
Weighted average common shares outstanding      
Basic (in shares) 129.7 139.6 155.3
Diluted (in shares) 131.5 139.6 157.8