Other Intangible Assets, net (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

The components of other intangible assets, net, as of December 31, 2021 and 2020, were as follows:

			December 31,
			2021							2020
	Weighted
	Average		Intangible					Intangible		Intangible					Intangible
	Life		Assets,		Accumulated			Assets,		Assets,		Accumulated			Assets,
(millions)	(Years)		Gross		Amortization			Net		Gross		Amortization			Net
Covenant not to compete		1.9	$	2.9	$	(2.3	)	$	0.6	$	2.9	$	(1.3	)	$	1.6
Trade names and trademarks		2.0		0.9		(0.5	)		0.4		0.9		(0.2	)		0.7
Proprietary know how		2.8		3.8		(1.3	)		2.5		3.8		(0.4	)		3.4
Management contract rights		7.2		81.0		(47.7	)		33.3		81.0		(42.6	)		38.4
Customer relationships		12.1		21.5		(3.9	)		17.6		21.5		(2.5	)		19.0
Other intangible assets, net		8.5	$	110.1	$	(55.7	)	$	54.4	$	110.1	$	(47.0	)	$	63.1

Summary of Amortization of Intangible Assets

Amortization expense related to intangible assets for the years ended December 31, 2021, 2020 and 2019, which was included in Depreciation and amortization within the Consolidated Statements of Income (Loss), was as follows:

	Year Ended December 31,
(millions)	2021		2020		2019
Amortization expense	$	8.7	$	13.2	$	15.1

Schedule of Expected Future Amortization of Intangible Assets

The expected future amortization of intangible assets as of December 31, 2021 was as follows:

(millions)	Intangible asset amortization
2022	$	8.1
2023		8.0
2024		7.3
2025		6.6
2026		6.1
2027 and thereafter		18.3
Total	$	54.4