Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

The following table summarizes the carrying amount of goodwill and changes in the carrying amount of goodwill, by segment:


(in millions)	Environmental Solutions		Safety & Security Systems		Total
Balance at December 31, 2020	$	279.9	$	114.3	$	394.2
Acquisitions	40.3		—		40.3
Translation adjustments	—		(2.3)		(2.3)
Balance at December 31, 2021	320.2		112.0		432.2
Acquisitions, including measurement period adjustments	24.0		—		24.0
Translation adjustments	(0.4)		(2.4)		(2.8)
Balance at December 31, 2022	$	343.8	$	109.6	$	453.4

Schedule of Finite-Lived Intangible Assets

The following table summarizes the gross carrying amount and accumulated amortization of intangible assets for each major class of intangible assets:


	2022						2021
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Definite-lived intangible assets:
Customer relationships (a)	$	153.7	$	(52.0)	$	101.7	$	146.2	$	(39.8)	$	106.4
Other (a)	5.7		(3.4)		2.3		5.3		(2.9)		2.4
Total definite-lived intangible assets	159.4		(55.4)		104.0		151.5		(42.7)		108.8
Indefinite-lived intangible assets:
Trade names	99.9		—		99.9		96.9		—		96.9
Other	4.3		—		4.3		—		—		—
Total indefinite-lived intangible assets	104.2		—		104.2		96.9		—		96.9
Total intangible assets	$	263.6	$	(55.4)	$	208.2	$	248.4	$	(42.7)	$	205.7

(a) Average useful life of customer relationships and other definite-lived intangible assets are estimated to be approximately 12 years and 7 years, respectively. The average useful life across all definite-lived intangible assets is estimated to be approximately 12 years.

Schedule of Indefinite-Lived Intangible Assets

The following table summarizes the gross carrying amount and accumulated amortization of intangible assets for each major class of intangible assets:


	2022						2021
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Definite-lived intangible assets:
Customer relationships (a)	$	153.7	$	(52.0)	$	101.7	$	146.2	$	(39.8)	$	106.4
Other (a)	5.7		(3.4)		2.3		5.3		(2.9)		2.4
Total definite-lived intangible assets	159.4		(55.4)		104.0		151.5		(42.7)		108.8
Indefinite-lived intangible assets:
Trade names	99.9		—		99.9		96.9		—		96.9
Other	4.3		—		4.3		—		—		—
Total indefinite-lived intangible assets	104.2		—		104.2		96.9		—		96.9
Total intangible assets	$	263.6	$	(55.4)	$	208.2	$	248.4	$	(42.7)	$	205.7