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Goodwill and other identifiable intangible assets

9 Months Ended

Sep. 26, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and other identifiable intangible assets

Changes in goodwill during the first nine months ended September 26, 2021, were as follows:


In millions	Gas Cylinders		Elektron		Total
At January 1, 2021	$	27.9	$	42.3	$	70.2
Additions	2.6		—		2.6
Exchange difference	0.1		—		0.1
Net balance at September 26, 2021	$	30.6	$	42.3	$	72.9

Identifiable intangible assets consisted of the following:


	September 26, 2021						December 31, 2020
In millions	Gross		Accumulated amortization		Net		Gross		Accumulated amortization		Net
Customer relationships	$	13.4	$	(5.5)	$	7.9	$	13.4	$	(5.2)	$	8.2
Technology and trading related	8.3		(4.0)		4.3		8.3		(3.7)		4.6
	$	21.7	$	(9.5)	$	12.2	$	21.7	$	(8.9)	$	12.8

Identifiable intangible asset amortization expense was $0.7 million and $0.6 million for the first nine months of 2021 and 2020, respectively.

Intangible asset amortization expense during the remainder of 2021 and over the next five years is expected to be approximately $0.2 million in 2021, $0.9 million in 2022, $0.9 million in 2023, $0.9 million in 2024, $0.9 million in 2025 and $0.9 million in 2026.