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Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying amount of goodwill for the nine months ended September 30, 2023 were as follows:


	Goodwill		Accumulated Impairment Losses		Total
Balance as of December 31, 2022	$	218.8	$	(36.8)	$	182.0
Foreign currency fluctuations	(6.3)		4.8		(1.5)
Balance as of September 30, 2023	$	212.5	$	(32.0)	$	180.5

The balances of acquired intangible assets, excluding goodwill, were as follows:


	Customer Lists		Trade Names		Technology		Total
Balance as of September 30, 2023
Original cost	$	144.6	$	28.1	$	15.9	$	188.6
Accumulated amortization	(94.2)		(17.8)		(12.4)		(124.4)
Carrying value	$	50.4	$	10.3	$	3.5	$	64.2
Weighted average original life (in years)	15		11		11

Balance as of December 31, 2022
Original cost	$	146.6	$	28.6	$	15.9	$	191.1
Accumulated amortization	(87.5)		(15.9)		(11.3)		(114.7)
Carrying value	$	59.1	$	12.7	$	4.6	$	76.4
Weighted average original life (in years)	15		11		11

Amortization expense on intangible assets for the three and nine months ended September 30, 2023 was $3.5 million and $11.0 million, respectively. Amortization expense on intangible assets for the three and nine months ended September 30, 2022 was $3.7 million and $12.1 million, respectively.

Estimated aggregate amortization expense based on the current carrying value of amortizable intangible assets for each of the five succeeding years and thereafter is as follows:


Remaining 2023	$	3.4
2024	12.9
2025	11.6
2026	10.3
2027	7.1
Thereafter	18.9
Total	$	64.2