Condensed Consolidated Statements Of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues	$ 356.9	$ 334.3	$ 1,055.7	$ 987.3
Costs and expenses:
Cost of revenues	50.0	47.8	150.2	142.6
Research and development	21.0	19.6	64.2	59.7
Selling, General and Administrative Expense	49.1	45.6	143.7	140.3
Total costs and expenses	120.1	113.0	358.1	342.6
Operating income	236.8	221.3	697.6	644.7
Interest expense	(18.8)	(18.8)	(56.5)	(64.4)
Non-operating income (loss), net	4.9	0.1	6.8	(1.5)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	222.9	202.6	647.9	578.8
Income tax expense	(53.4)	(46.0)	(153.6)	(124.1)
Net Income	169.5	156.6	494.3	454.7
Other comprehensive income (loss)	0.2	0.1	0.1	0.0
Comprehensive Income	$ 169.7	$ 156.7	$ 494.4	$ 454.7
Basic income (loss) per share
Net Income	$ 1.58	$ 1.40	$ 4.55	$ 4.05
Diluted income (loss) per share
Net Income	$ 1.58	$ 1.40	$ 4.55	$ 4.04
Shares used to compute net income per share
Basic	107.1	111.7	108.7	112.4
Diluted	107.1	111.8	108.7	112.5