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Revenue - Schedule of Activity Related to Contract Assets (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025
Change in Contract with Customer Asset [Line Items] |  |  |
Beginning Balance | $ 40.7 | $ 35.7 | $ 29.8
Net revenue billed | (1.8) | 5.0 | 5.9
Ending Balance | 38.9 | 40.7 | 35.7
Composite Materials |  |  |
Change in Contract with Customer Asset [Line Items] |  |  |
Beginning Balance | 11.2 | 9.5 | 9.1
Net revenue billed | 1.8 | 1.7 | 0.4
Ending Balance | 13.0 | 11.2 | 9.5
Engineered Products |  |  |
Change in Contract with Customer Asset [Line Items] |  |  |
Beginning Balance | 29.5 | 26.2 | 20.7
Net revenue billed | (3.6) | 3.3 | 5.5
Ending Balance | $ 25.9 | $ 29.5 | $ 26.2

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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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