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Consolidated Statements Of Comprehensive Income - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenues $ 1,493.1 $ 1,424.9 $ 1,327.6
Costs and expenses:      
Cost of revenues 197.3 200.7 191.9
Research and development 91.0 85.7 80.5
Selling, General and Administrative Expense 204.2 195.4 188.4
Total costs and expenses 492.5 481.8 460.8
Operating income 1,000.6 943.1 866.8
Interest expense (75.3) (75.3) (83.3)
Non-operating income, net 51.2 12.4 (1.3)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total 976.5 880.2 782.2
Income tax (expense) benefit (158.9) (206.4) 2.6
Net income 817.6 673.8 784.8
Other Comprehensive Income (Loss), Net of Tax 0.1 0.1 0.0
Comprehensive income $ 817.7 $ 673.9 $ 784.8
Earnings per share      
Earnings per Share, Basic $ 7.91 $ 6.24 $ 7.01
Earnings per Share, Diluted $ 7.90 $ 6.24 $ 7.00
Shares used to compute net income per share      
Basic 103.4 107.9 112.0
Diluted 103.5 108.0 112.2