Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of finite-lived intangible assets

	December 31, 2019							December 31, 2018
	Weighted Average Remaining Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Customer relationships	10.0	$	86.6	$	39.6	$	47.0	$	86.0	$	34.5	$	51.5
Indefinite-lived tradenames	*	24.6		*		24.6		24.1		*		24.1
Technology	15.5	22.9		5.3		17.6		22.9		4.1		18.8
Other	7.5	4.8		3.4		1.4		4.1		3.2		0.9
Total		$	138.9	$	48.3	$	90.6	$	137.1	$	41.8	$	95.3
* Not applicable, as these tradenames have an indefinite life.

Schedule of indefinite-lived intangible assets

	December 31, 2019							December 31, 2018
	Weighted Average Remaining Useful Life (Years)	Gross Value		Accumulated Amortization		Net Value		Gross Value		Accumulated Amortization		Net Value
Customer relationships	10.0	$	86.6	$	39.6	$	47.0	$	86.0	$	34.5	$	51.5
Indefinite-lived tradenames	*	24.6		*		24.6		24.1		*		24.1
Technology	15.5	22.9		5.3		17.6		22.9		4.1		18.8
Other	7.5	4.8		3.4		1.4		4.1		3.2		0.9
Total		$	138.9	$	48.3	$	90.6	$	137.1	$	41.8	$	95.3
* 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,
	2019		2018		2017
Amortization expense	$	6.5	$	6.9	$	6.6

Amortization for the next five years

We estimate amortization expense for the five years subsequent to December 31, 2019 as follows:

2020	$	6.5
2021	$	6.5
2022	$	6.4
2023	$	6.3
2024	$	6.1