Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes the carrying amount of goodwill, and the changes in the carrying amount of goodwill in the nine months ended September 30, 2021, by segment:

(in millions)	Environmental Solutions		Safety & Security Systems		Total
Balance at January 1, 2021	$	279.9	$	114.3	$	394.2
Acquisitions	14.3		—		14.3
Translation adjustments	0.1		(1.7)		(1.6)
Balance at September 30, 2021	$	294.3	$	112.6	$	406.9

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:

	September 30, 2021						December 31, 2020
(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)	$	125.5	$	(37.3)	$	88.2	$	108.6	$	(29.6)	$	79.0
Other (a)	4.8		(2.7)		2.1		4.4		(2.3)		2.1
Total definite-lived intangible assets	130.3		(40.0)		90.3		113.0		(31.9)		81.1
Indefinite-lived intangible assets:
Trade names	82.7		—		82.7		72.4		—		72.4
Total indefinite-lived intangible assets	82.7		—		82.7		72.4		—		72.4
Total intangible assets	$	213.0	$	(40.0)	$	173.0	$	185.4	$	(31.9)	$	153.5

(a)    Average useful life of customer relationships and other definite-lived intangible assets are estimated to be approximately 12 years and seven 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:

	September 30, 2021						December 31, 2020
(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)	$	125.5	$	(37.3)	$	88.2	$	108.6	$	(29.6)	$	79.0
Other (a)	4.8		(2.7)		2.1		4.4		(2.3)		2.1
Total definite-lived intangible assets	130.3		(40.0)		90.3		113.0		(31.9)		81.1
Indefinite-lived intangible assets:
Trade names	82.7		—		82.7		72.4		—		72.4
Total indefinite-lived intangible assets	82.7		—		82.7		72.4		—		72.4
Total intangible assets	$	213.0	$	(40.0)	$	173.0	$	185.4	$	(31.9)	$	153.5

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