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Business Segments (Details2) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Depreciation and amortization | $ 143.9 | $ 143.3 | $ 151.1
Capital expenditures | 152.6 | 136.5 | 168.2
Operating Segments |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Depreciation and amortization | 143.9 | 143.3 | 151.1
Capital expenditures | 152.6 | 136.5 | 168.2
Operating Segments | High Performance Materials & Components |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Depreciation and amortization | 75.0 | 78.1 | 84.6
Capital expenditures | 40.2 | 83.1 | 119.9
Operating Segments | Corporate [Member] |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Depreciation and amortization | 4.4 | 3.1 | 3.0
Capital expenditures | 1.8 | 7.5 | 0.9
Operating Segments | Advanced Alloys & Solutions [Member] |  |  |
Segment Reporting Other Significant Reconciling Item [Line Items] |  |  |
Depreciation and amortization | 64.5 | 62.1 | 63.5
Capital expenditures | $ 110.6 | $ 45.9 | $ 47.4

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