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INCOME TAXES (Reconciliation of Provision for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective tax rate reconciliation [Abstract]
Expected federal income tax provision at statutory rate	$ 105.3	$ 102.1	$ 84.8
State income taxes, net of federal benefit	27.4	21.5	21.0
Increase (decrease) in valuation allowance	1.9	(0.5)	(5.0)
Research credits	(20.2)	(17.5)	(13.1)
Excess tax benefit	(5.9)	(1.8)	(10.9)
Tax reserves	4.2	1.5	(12.8)
Nondeductible compensation	8.8	11.4	10.4
International restructuring	0.1	(3.9)	34.9
Other adjustments	5.0	4.2	2.1
Total provision for income taxes	$ 126.6	$ 117.0	$ 111.4

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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