GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Amount of Goodwill

Changes in the amount of goodwill for the twelve months ended December 31, 2023 and 2022, are as follows:  

	Workforce Solutions		U.S. Information Solutions		International		Total
	(In millions)
Balance, December 31, 2021	$	2,365.4	$	1,900.1	$	1,992.6	$	6,258.1
Acquisitions	145.0		111.8		27.0		283.8
Adjustments to initial purchase price allocation	10.7		(7.1)		(3.5)		0.1
Foreign currency translation	(0.3)		—		(133.2)		(133.5)
Divestitures	—		—		(24.6)		(24.6)
Balance, December 31, 2022	2,520.8		2,004.8		1,858.3		6,383.9
Acquisitions	—		—		410.4		410.4
Adjustments to initial purchase price allocation	(0.7)		1.4		2.1		2.8
Foreign currency translation	0.1		—		32.7		32.8
Balance, December 31, 2023	$	2,520.2	$	2,006.2	$	2,303.5	$	6,829.9

Purchased Intangible Assets

Purchased intangible assets, net, recorded on our Consolidated Balance Sheets at December 31, 2023 and 2022, consisted of the following:

	December 31, 2023						December 31, 2022
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Definite-lived intangible assets:	(In millions)
Purchased data files	$	1,158.5	$	(604.2)	$	554.3	$	1,090.0	$	(527.8)	$	562.2
Proprietary database	705.8		(171.5)		534.3		705.9		(115.0)		590.9
Customer relationships	1,053.5		(484.2)		569.3		874.6		(407.4)		467.2
Acquired software and technology	222.5		(75.4)		147.1		225.4		(42.6)		182.8
Trade names, non-compete agreements and other intangible assets	79.6		(25.8)		53.8		41.2		(25.8)		15.4
Total definite-lived intangible assets	$	3,219.9	$	(1,361.1)	$	1,858.8	$	2,937.1	$	(1,118.6)	$	1,818.5

Estimated Future Amortization Expense

Estimated future amortization expense related to definite-lived purchased intangible assets at December 31, 2023 is as follows:

Years ending December 31,	Amount
	(In millions)
2024	$	265.9
2025	257.9
2026	241.9
2027	229.2
2028	173.1
Thereafter	690.8
	$	1,858.8