INCOME TAXES - Reconciliation of the Statutory Rate to Effective Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of the statutory U.S. federal income tax rate to the company's effective income tax rate
Statutory U.S. rate (as a percent)	21.00%	21.00%	21.00%
State income taxes, net of federal benefit (as a percent)	1.40%	1.30%	0.60%
Foreign operations (as a percent)	(0.50%)	(0.80%)	(0.60%)
Excess stock benefits (as a percent)	(0.30%)	(0.40%)	(2.00%)
R&D credit (as a percent)	(1.30%)	(1.40%)	(1.30%)
Foreign derived intangible income (as a percent)	(1.20%)	(1.80%)	(1.60%)
Change in valuation allowance (as a percent)	0.50%	0.70%	0.50%
Legal entity rationalization (as a percent)	0.10%	(1.50%)
One-time transfer of intangibles (as a percent)			1.80%
Other, net (as a percent)	0.90%	0.40%	0.70%
Effective income tax rate (as a percent)	20.60%	17.50%	19.10%
Discrete tax charges			$ 34.9
Non-cash deferred tax charge			25.1
Remaining tax expense		$ 8.8	9.8
Special gains and charges, recognized discrete tax expense (benefit), net,	$ (24.7)	53.7	53.3
Recognized discrete tax expense (benefit), net			5.8
Recognized discrete tax benefits, legal entity rationalization		14.6
Excess tax benefits, share-based compensation		6.0	29.1
Recognized discrete tax benefits	11.2	11.8
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits
Balance at beginning of year	24.9	25.1	20.7
Additions based on tax positions related to the current year	5.8	2.7	3.8
Additions for tax positions of prior years	1.7	3.6	3.0
Current year acquisitions			4.4
Assumed in connection with acquisitions			4.4
Reductions for tax positions of prior years		(1.5)
Reductions for tax positions due to statute of limitations	(2.7)	(0.7)	(3.0)
Settlements	(5.5)	(3.4)	(3.7)
Foreign currency translation		(0.9)	(0.1)
Balance at end of year	24.2	24.9	25.1
Unrecognized tax benefits that would affect the annual effective tax rate	21.6	23.1	22.8
Accrued interest, including minor amounts for penalties	4.0	$ 4.0	$ 3.2
Purolite
Reconciliation of the statutory U.S. federal income tax rate to the company's effective income tax rate
Deferred tax liability	$ 2.8