Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

	December 31, 2021							December 31, 2020
	Weighted Average Remaining Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Customer relationships	9.3	$	90.4	$	50.0	$	40.4	$	87.5	$	44.5	$	43.0
Indefinite-lived tradenames	*	24.7		*		24.7		25.2		*		25.2
Technology	13.5	23.1		7.6		15.5		23.7		6.4		17.3
Other	5.8	4.9		3.8		1.1		4.9		3.6		1.3
Total		$	143.1	$	61.4	$	81.7	$	141.3	$	54.5	$	86.8
* Not applicable, as these tradenames have an indefinite life.

Schedule of indefinite-lived intangible assets

	December 31, 2021							December 31, 2020
	Weighted Average Remaining Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Customer relationships	9.3	$	90.4	$	50.0	$	40.4	$	87.5	$	44.5	$	43.0
Indefinite-lived tradenames	*	24.7		*		24.7		25.2		*		25.2
Technology	13.5	23.1		7.6		15.5		23.7		6.4		17.3
Other	5.8	4.9		3.8		1.1		4.9		3.6		1.3
Total		$	143.1	$	61.4	$	81.7	$	141.3	$	54.5	$	86.8
* 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,
	2021		2020		2019
Amortization expense	$	6.9	$	6.2	$	6.5

Amortization for the next five years

We estimate amortization expense for the five years subsequent to 2021 as follows:

2022	$	6.5
2023	$	6.4
2024	$	6.3
2025	$	6.3
2026	$	5.9