Business Segments (Details2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Other Significant Reconciling Item [Line Items]
Depreciation and amortization	$ 142.9	$ 143.9	$ 143.3
Capital expenditures	130.9	152.6	136.5
Operating Segments
Segment Reporting Other Significant Reconciling Item [Line Items]
Depreciation and amortization	142.9	143.9	143.3
Capital expenditures	130.9	152.6	136.5
Operating Segments | High Performance Materials & Components
Segment Reporting Other Significant Reconciling Item [Line Items]
Depreciation and amortization	68.3	75.0	78.1
Capital expenditures	33.3	40.2	83.1
Operating Segments | Corporate [Member]
Segment Reporting Other Significant Reconciling Item [Line Items]
Depreciation and amortization	7.2	4.4	3.1
Capital expenditures	8.0	1.8	7.5
Operating Segments | Advanced Alloys & Solutions [Member]
Segment Reporting Other Significant Reconciling Item [Line Items]
Depreciation and amortization	67.4	64.5	62.1
Capital expenditures	$ 89.6	$ 110.6	$ 45.9