Other Intangible Assets, net (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible Assets, Net

The components of other intangible assets, net, as of March 31, 2024 (unaudited) and December 31, 2023, were as follows:

			March 31, 2024							December 31, 2023
(millions)	Weighted Average Life (Years)		Intangible Assets, Gross		Accumulated Amortization			Intangible Assets, Net		Intangible Assets, Gross		Accumulated Amortization			Intangible Assets, Net
Management contract rights		5.4	$	81.0	$	(59.3	)	$	21.7	$	81.0	$	(58.0	)	$	23.0
Proprietary know how		6.0		24.0		(7.0	)		17.0		24.1		(6.2	)		17.9
Customer relationships		7.4		25.1		(9.5	)		15.6		25.1		(8.9	)		16.2
Trade names and trademarks		12.5		3.0		(1.3	)		1.7		3.0		(1.2	)		1.8
Covenant not to compete		3.7		1.3		(0.6	)		0.7		2.9		(2.1	)		0.8
Other intangible assets, net		6.3	$	134.4	$	(77.7	)	$	56.7	$	136.1	$	(76.4	)	$	59.7

Summary of Amortization of Other Intangible Assets

Amortization expense related to other intangible assets during the three months ended March 31, 2024 and 2023 (unaudited), respectively, which was included in Depreciation and amortization within the Condensed Consolidated Statements of Income, was as follows:

	Three Months Ended
(millions)	March 31, 2024		March 31, 2023
Amortization expense	$	2.9	$	3.0