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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Income Statement [Abstract]    
Net sales $ 993.0 $ 894.8
Cost of sales 231.8 233.6
Gross profit 761.2 661.2
Selling, general, and administrative expenses 280.3 256.0
Research and development expenses 171.4 143.2
Intellectual property litigation expenses 4.6 5.7
Change in fair value of contingent consideration liabilities, net (Note 8) 6.7 3.8
Special gain (Note 5) 24.0 0.0
Operating income 274.2 252.5
Interest income, net (2.0) (0.8)
Special gain (Note 5) 0.0 (7.1)
Other income, net (1.8) (3.1)
Income before provision for income taxes 278.0 263.5
Provision for income taxes 28.3 56.9
Net income $ 249.7 $ 206.6
Earnings per share:    
Basic (in dollars per share) $ 1.20 $ 0.98
Diluted (in dollars per share) $ 1.18 $ 0.96
Weighted-average number of common shares outstanding:    
Basic (in shares) 207.9 210.2
Diluted (in shares) 212.2 215.1