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Condensed Consolidated Statements Of Comprehensive Income - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenues $ 402.3 $ 384.3
Costs and expenses:    
Cost of revenues 49.4 49.1
Research and development 26.0 24.8
Selling, General and Administrative Expense 55.7 51.5
Total costs and expenses 131.1 125.4
Operating income 271.2 258.9
Interest expense (20.3) (18.8)
Non-operating income (loss), net 7.5 13.9
Income (Loss) before Income Taxes, Total 258.4 254.0
Income tax expense (59.1) (59.9)
Net Income 199.3 194.1
Other comprehensive income (loss) (0.3) (0.2)
Comprehensive Income $ 199.0 $ 193.9
Income (Loss) from Continuing Operations, Per Basic Share $ 2.11 $ 1.93
Income (Loss) from Continuing Operations, Per Diluted Share $ 2.10 $ 1.92
Basic 94.6 100.8
Diluted 94.8 100.9
Basic income (loss) per share    
Net Income $ 2.11 $ 1.93
Diluted income (loss) per share    
Net Income $ 2.10 $ 1.92
Shares used to compute net income per share    
Basic 94.6 100.8
Diluted 94.8 100.9