ACQUISITIONS AND DISPOSITIONS - Acquisition Summary (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2024 USD ($)	Jun. 30, 2023 item	Dec. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) item
Business Acquisition [Line Items]
Number of acquisitions | item		3			0
Number of other immaterial acquisitions | item		2	2
Goodwill			$ 7,907,300,000	$ 8,148,200,000	$ 8,012,700,000
Payments for merger related costs			3,200,000	4,100,000	7,200,000
Acquisition related liabilities and contingent consideration, purchase accounting adjustments				1,700,000
Prior year business combinations, net tangible assets adjustments			2,500,000	1,700,000	55,600,000
Net intangible assets purchase			1,000,000		191,000,000
Prior year business combinations, goodwill adjustments			$ 1,200,000	$ 700,000	253,800,000
Weighted average useful lives of definite-lived intangible assets acquired from other acquisitions			15 years	12 years
Finite-lived intangible assets acquired					0
Global Institutional and Specialty
Business Acquisition [Line Items]
Goodwill			$ 613,200,000	$ 610,000,000	$ 567,600,000
Business Acquisitions and Investment
Business Acquisition [Line Items]
Net tangible assets (liabilities) acquired			22,700,000	20,800,000
Identifiable intangible assets			143,200,000	88,700,000
Goodwill			156,700,000	70,200,000
Total aggregate purchase price			322,600,000	179,700,000
Acquisition related liabilities and contingent consideration			12,900,000	3,900,000
Net cash paid for acquisitions, including acquisition-related liabilities and contingent consideration			309,700,000	175,800,000
Business Acquisitions and Investment | Customer relationships
Business Acquisition [Line Items]
Identifiable intangible assets			118,300,000	60,800,000
Business Acquisitions and Investment | Trademarks
Business Acquisition [Line Items]
Identifiable intangible assets			5,700,000
Business Acquisitions and Investment | Non-compete agreements
Business Acquisition [Line Items]
Identifiable intangible assets			1,600,000	2,100,000
Business Acquisitions and Investment | Other assets
Business Acquisition [Line Items]
Identifiable intangible assets			$ 17,600,000	$ 25,800,000
Barclay water management
Business Acquisition [Line Items]
Consideration transferred	$ 262,200,000