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Consolidated Statements of Operations - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Statement [Abstract]    
Revenues $ 405.1 $ 280.5
Cost of sales 148.6 111.7
Gross profit 256.5 168.8
Operating expenses:    
Research and development 73.1 59.0
Selling, general and administrative 149.8 124.2
Total operating expenses 222.9 183.2
Operating income (loss) 33.6 (14.4)
Interest expense (15.4) (14.9)
Loss from equity investments 0.0 (4.2)
Interest and other income, net 4.2 6.9
Income (loss) before income taxes 22.4 (26.6)
Income tax expense 2.5 0.3
Net income (loss) $ 19.9 $ (26.9)
Basic net loss per share (USD per share) $ 0.22 $ (0.30)
Shares used to compute basic net loss per share (shares) 91.8 90.3
Diluted net loss per share (USD per share) $ 0.21 $ (0.30)
Shares used to compute diluted net loss per share (shares) 94.1 90.3