INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2023

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Finite-Lived Intangible Assets by Major Class

The following table presents the major classes of the company's intangible assets at December 31, 2023 and 2022:

(in millions)	Gross Book Value		Accumulated Amortization and Impairment		Net Book Value
December 31, 2023
Management contracts - indefinite-lived	$	6,954.3	(1,248.9)		$	5,705.4
Management contracts - finite-lived	318.3		(221.5)		96.8
Developed technology	94.2		(91.4)		2.8
Other (1)	107.2		(64.1)		43.1
Total	$	7,474.0	$	(1,625.9)	$	5,848.1
December 31, 2022
Management contracts - indefinite-lived	$	6,949.7	N/A		$	6,949.7
Management contracts - finite-lived	318.3		(189.2)		129.1
Developed technology	90.5		(78.8)		11.7
Other (1)	104.8		(54.1)		50.7
Total	$	7,463.3	$	(322.1)	$	7,141.2

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(1) Includes indefinite-lived non-management contracts intangible assets of $19.1 million for the years ended December 31, 2023 and 2022.

Schedule of Future Amortization Expense of Intangible Assets

Estimated amortization expense for each of the five succeeding fiscal years based upon the company's intangible assets at December 31, 2023 is as follows:

(in millions) Years Ended December 31,	Estimated Amortization Expense
2024	$	(44.8)
2025	$	(37.7)
2026	$	(35.9)
2027	$	(3.6)
2028	$	(1.5)