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RESTRUCTURING ACTIVITIES (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Restructuring Reserve [Roll Forward]
Restructuring, beginning balance	$ 65.4	$ 78.7		$ 78.7
Charges	0.4	4.6	$ 11.3	5.0	$ 20.4
Other adjustments	4.1	0.8
Payments	(16.7)	(18.7)
Restructuring, ending balance	53.2	65.4		53.2
Cost Efficiency Program
Restructuring Reserve [Roll Forward]
Restructuring, beginning balance	6.8	14.1		14.1
Charges	2.7	1.1
Other adjustments	4.1	0.8
Payments	(5.6)	(9.2)
Restructuring, ending balance	8.0	6.8		8.0
GfK Integration
Restructuring Reserve [Roll Forward]
Restructuring, beginning balance	58.6	64.6		64.6
Charges	(2.3)	3.5
Other adjustments	0.0	0.0
Payments	(11.1)	(9.5)
Restructuring, ending balance	$ 45.2	$ 58.6		$ 45.2

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of increase (decrease) in the restructuring reserve related to foreign currency translation (gain) loss and other increases (decreases).

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