SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2025

Accounting Policies [Abstract]

Schedule of Property, Plant and Equipment

The table below summarizes the estimated useful lives of property and equipment:

	Useful Life (in years)
Buildings	25-40
Information and communication equipment	2-7
Furniture, equipment and other	2-10

The following table sets forth the components of property and equipment:

	December 31,
(in millions)	2025		2024
Buildings and leasehold improvements	$	145.4	$	139.9
Information and communication equipment	353.3		271.3
Furniture, equipment and other	42.3		51.8
	541.0		463.0
Less: accumulated depreciation	(332.8)		(255.0)
	$	208.2	$	208.0

Schedule of Finite-Lived Intangible Assets

The table below summarizes the estimated useful lives of intangibles assets:

	Useful Life (in years)
Computer software	3-8
Client relationships	10-15
Retail partnerships	10-15
Trade names and trademarks	8-15
Consumer panels	6-8
Other intangibles	3

The table below summarizes the carrying value of intangible assets:

	December 31, 2025						December 31, 2024
(in millions)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Computer software(1)	$	1,800.6	$	(1,181.2)	$	619.4	$	1,413.2	$	(755.2)	$	658.0
Client relationships(1)	1,148.3		(315.1)		833.2		1,056.6		(204.8)		851.8
Retail partnerships(1)	656.6		(201.5)		455.1		600.8		(140.5)		460.3
Trade names and trademarks	301.8		(96.1)		205.7		274.2		(64.4)		209.8
Consumer panels(1)	83.2		(40.9)		42.3		60.4		(22.2)		38.2
Other intangibles	88.2		(52.5)		35.7		106.8		(37.3)		69.5
	$	4,078.7	$	(1,887.3)	$	2,191.4	$	3,512.0	$	(1,224.4)	$	2,287.6

(1)The net carrying amount as of December 31, 2024 excludes $12.8 million of client relationships, $4.4 million of retail partnerships, $2.8 million of consumer panels and $2.2 million of computer software that are classified as held for sale, as disclosed in Note 4. “Discontinued Operations and Disposals”.