Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

	December 31, 2023							December 31, 2022
	Weighted Average Remaining Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Customer relationships	7.9	$	94.5	$	60.5	$	34.0	$	93.8	$	55.2	$	38.6
Indefinite-lived tradenames	*	25.9		*		25.9		25.7		*		25.7
Technology	11.5	22.8		10.0		12.8		22.4		8.8		13.6
Other	4.1	4.8		4.2		0.6		4.8		4.0		0.8
Total		$	148.0	$	74.7	$	73.3	$	146.7	$	68.0	$	78.7
* Not applicable, as these tradenames have an indefinite life.

Schedule of indefinite-lived intangible assets

	December 31, 2023							December 31, 2022
	Weighted Average Remaining Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Customer relationships	7.9	$	94.5	$	60.5	$	34.0	$	93.8	$	55.2	$	38.6
Indefinite-lived tradenames	*	25.9		*		25.9		25.7		*		25.7
Technology	11.5	22.8		10.0		12.8		22.4		8.8		13.6
Other	4.1	4.8		4.2		0.6		4.8		4.0		0.8
Total		$	148.0	$	74.7	$	73.3	$	146.7	$	68.0	$	78.7
* Not applicable, as these tradenames have an indefinite life.

Schedule of amortization of intangible assets

Amortization expense of other intangible assets as follows:

	Year Ended December 31,
	2023		2022		2021
Amortization expense	$	6.7	$	6.6	$	6.9

Amortization for the next five years

We estimate amortization expense for the five years subsequent to 2023 as follows:

2024	$	6.5
2025	$	6.5
2026	$	6.1
2027	$	6.1
2028	$	5.2