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Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill beginning balance	$ 403.7	$ 337.4
Goodwill acquired during the year	250.4	61.2
Foreign currency translation adjustments	(5.8)	5.1
Goodwill ending balance	648.3	403.7
Advanced Materials & Structures
Goodwill [Roll Forward]
Goodwill beginning balance	398.4	332.5
Goodwill acquired during the year	250.4	61.2
Foreign currency translation adjustments	(5.4)	4.7
Goodwill ending balance	643.4	398.4
Engineered Papers
Goodwill [Roll Forward]
Goodwill beginning balance	5.3	4.9
Goodwill acquired during the year	0.0	0.0
Foreign currency translation adjustments	(0.4)	0.4
Goodwill ending balance	$ 4.9	$ 5.3

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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