Goodwill and Intangible Assets

6 Months Ended

Jun. 30, 2021

6.	Goodwill and Intangible Assets

Goodwill

The following table sets forth the changes in the carrying amount of goodwill (dollars in millions):


	Total
Balance at December 31, 2020	$	320.4
Current period additions		(0.3	)
Foreign currency impact		(5.2	)

Balance at June 30, 2021	$	314.9

Intangible Assets

The following is a summary of intangible assets, excluding goodwill (dollars in millions):


	June 30, 2021							December 31, 2020
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Existing technology and related patents	$	300.9	$	(198.4	)	$	102.5	$	309.8	$	(194.6	)	$	115.2
Customer relationships		145.3		(51.8	)		93.5		148.3		(45.4	)		102.9
Trade names		14.9		(5.1	)		9.8		15.2		(4.4	)		10.8
Other		0.3		(0.2	)		0.1		0.3		(0.1	)		0.2

Intangible assets	$	461.4	$	(255.5	)	$	205.9	$	473.6	$	(244.5	)	$	229.1

For the three months ended June 30, 2021 and 2020, the Company recorded amortization expense of $9.1 million and $9.0 million, respectively, related to intangible assets subject to amortization. For the six months ended June 30, 2021 and 2020, the Company recorded amortization expense of $18.0 million and $17.7 million, respectively, related to intangible assets subject to amortization.