Condensed Consolidated Statements Of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues	$ 384.3	$ 364.4
Costs and expenses:
Cost of revenues	49.1	49.9
Research and development	24.8	24.2
Selling, General and Administrative Expense	51.5	49.0
Total costs and expenses	125.4	123.1
Operating income	258.9	241.3
Interest expense	(18.8)	(18.8)
Non-operating income (loss), net	13.9	11.3
Income (Loss) before Income Taxes, Total	254.0	233.8
Income tax expense	(59.9)	(55.1)
Net Income	194.1	178.7
Other comprehensive income (loss)	(0.2)	0.0
Comprehensive Income	$ 193.9	$ 178.7
Basic income (loss) per share
Net Income	$ 1.93	$ 1.70
Diluted income (loss) per share
Net Income	$ 1.92	$ 1.70
Shares used to compute net income per share
Basic	100.8	104.9
Diluted	100.9	105.0