Business Segments (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of sales by segment

	Fiscal Year
(In millions)	2023		2022		2021
Total sales:
High Performance Materials & Components	$	2,302.0	$	1,815.7	$	1,248.3
Advanced Alloys & Solutions	2,336.9		2,433.7		1,762.4
Total sales	4,638.9		4,249.4		3,010.7
Intersegment sales:
High Performance Materials & Components	181.8		174.5		93.2
Advanced Alloys & Solutions	283.4		238.9		117.7
Total intersegment sales	465.2		413.4		210.9
Sales to external customers:
High Performance Materials & Components	2,120.2		1,641.2		1,155.1
Advanced Alloys & Solutions	2,053.5		2,194.8		1,644.7
Total sales to external customers	$	4,173.7	$	3,836.0	$	2,799.8

Schedule of operating profit (loss) by segment

	Fiscal Year
(In millions)	2023		2022 Revised		2021 Revised
EBITDA:
High Performance Materials & Components	$	433.6	$	303.4	$	170.3
Advanced Alloys & Solutions	276.6		375.3		246.8
Total segment EBITDA	710.2		678.7		417.1
Corporate expenses	(62.3)		(60.3)		(53.7)
Closed operations and other income (expenses)	(13.3)		(5.6)		3.1
Depreciation & amortization	(146.1)		(142.9)		(143.9)
Interest expense, net	(92.8)		(87.4)		(96.9)
Restructuring and other credits (charges) (See Note 19)	(31.4)		(23.7)		10.5
Strike related costs	—		—		(63.2)
Retirement benefit settlement gain (loss) (See Note 14)	(41.7)		—		64.9
Pension remeasurement gain (loss) (See Note 14)	(26.8)		100.3		147.2
Joint venture restructuring credit (See Note 7)	—		0.9		—
Debt extinguishment charge (See Note 10)	—		—		(65.5)
Gain (loss) on asset sales and sale of business, net	(0.6)		(105.4)		13.8
Income before income taxes	$	295.2	$	354.6	$	233.4

Schedule of other financial information by segment

Certain additional information regarding the Company’s business segments is presented below:

	Fiscal Year
(In millions)	2023		2022		2021
Depreciation and amortization:
High Performance Materials & Components	$	71.1	$	68.3	$	75.0
Advanced Alloys & Solutions	67.9		67.4		64.5
Other	7.1		7.2		4.4
Total depreciation and amortization	$	146.1	$	142.9	$	143.9
Capital expenditures:
High Performance Materials & Components	$	100.4	$	33.3	$	40.2
Advanced Alloys & Solutions	97.2		89.6		110.6
Corporate	3.1		8.0		1.8
Total capital expenditures	$	200.7	$	130.9	$	152.6

	Fiscal Year
Identifiable assets:	2023		2022		2021
High Performance Materials & Components	$	1,990.9	$	1,749.3	$	1,624.8
Advanced Alloys & Solutions	1,996.7		1,981.1		1,914.0
Corporate:
Deferred Taxes	135.7		4.7		6.3
Cash and cash equivalents and other	861.8		710.5		740.1
Total assets	$	4,985.1	$	4,445.6	$	4,285.2

Schedule of company assets by country

	Fiscal Year				Fiscal Year				Fiscal Year
($ in millions)	2023		Percent of total		2022		Percent of total		2021		Percent of total
Total assets:
United States	$	4,463.7	90	%	$	3,942.7	89	%	$	3,587.0	84	%
China	295.8		6	%	321.1		7	%	406.4		9	%
United Kingdom	16.9		—	%	13.4		—	%	153.9		4	%
Other	208.7		4	%	168.4		4	%	137.9		3	%
Total Assets	$	4,985.1	100	%	$	4,445.6	100	%	$	4,285.2	100	%