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Goodwill and Purchased Intangible Assets - Schedule of Gross Goodwill and Other Purchased Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Changes in the carrying amount of gross goodwill and other purchased intangibles |  |
Balance at the beginning of the period | $ 256.0 | $ 267.5
Amortization expense | (6.8) | (6.8)
Currency translation adjustments and other | 2.1 | (4.7)
Balance at the end of the period | 251.3 | 256.0
Composite Materials |  |
Changes in the carrying amount of gross goodwill and other purchased intangibles |  |
Balance at the beginning of the period | 86.9 | 93.4
Amortization expense | (1.8) | (1.8)
Currency translation adjustments and other | 2.1 | (4.7)
Balance at the end of the period | 87.2 | 86.9
Engineered Products |  |
Changes in the carrying amount of gross goodwill and other purchased intangibles |  |
Balance at the beginning of the period | 169.1 | 174.1
Amortization expense | (5.0) | (5.0)
Currency translation adjustments and other | 0.0 | 0.0
Balance at the end of the period | $ 164.1 | $ 169.1

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- Definition Reflects increase (decrease) to the recorded value goodwill and indefinite-lived intangible assets for foreign currency translation adjustments. + References No definition available. + Details
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- Definition Changes in the carrying amount of gross goodwill and other purchased intangibles + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. + References No definition available. + Details
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