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Revenue - Schedule of Activity Related to Contract Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Change in Contract with Customer Asset [Line Items] |  |
Beginning Balance | $ 52.7 | $ 50.5
Net revenue billed | (9.6) | 2.2
Ending Balance | 43.1 | 52.7
Composite Materials |  |
Change in Contract with Customer Asset [Line Items] |  |
Beginning Balance | 12.8 | 12.9
Net revenue billed | (5.0) | (0.1)
Ending Balance | 7.8 | 12.8
Engineered Products |  |
Change in Contract with Customer Asset [Line Items] |  |
Beginning Balance | 39.9 | 37.6
Net revenue billed | (4.6) | 2.3
Ending Balance | $ 35.3 | $ 39.9

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130533-203044 + Details
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