Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 28, 2025

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Comparative information of the Company’s overall revenues (in millions) by global and geographical markets for the fiscal years ended December 28, 2025, December 29, 2024 and December 31, 2023 is as follows:

	Fiscal Year
(in millions)	2025						2024						2023
	HPMC		AA&S		Total		HPMC		AA&S		Total		HPMC		AA&S		Total
Aerospace & Defense:
Jet-Engines- Commercial	$	1,649.6	$	113.3	$	1,762.9	$	1,365.4	$	92.4	$	1,457.8	$	1,255.3	$	78.2	$	1,333.5
Airframes- Commercial	312.1		478.8		790.9		369.7		403.2		772.9		350.6		388.8		739.4
Defense	277.7		280.0		557.7		224.8		265.4		490.2		181.0		220.9		401.9
Total Aerospace & Defense	$	2,239.4	$	872.1	$	3,111.5	$	1,959.9	$	761.0	$	2,720.9	$	1,786.9	$	687.9	$	2,474.8
Other Markets:
Specialty Energy	75.8		181.5		257.3		96.8		187.8		284.6		93.9		179.3		273.2
Electronics	—		184.8		184.8		3.0		191.3		194.3		3.1		156.8		159.9
Medical	55.2		84.2		139.4		115.5		109.4		224.9		102.6		74.3		176.9
Automotive	6.5		238.1		244.6		15.2		244.2		259.4		24.6		186.1		210.7
Conventional Energy	6.1		322.3		328.4		9.8		292.2		302.0		10.6		404.0		414.6
Construction/Mining	27.7		117.7		145.4		26.3		132.2		158.5		35.0		127.9		162.9
Other	31.0		145.0		176.0		52.0		165.5		217.5		63.5		237.2		300.7
Total Other Markets	$	126.5	$	1,092.1	$	1,218.6	$	221.8	$	1,134.8	$	1,356.6	$	239.4	$	1,186.3	$	1,425.7
Total	$	2,441.7	$	2,145.7	$	4,587.4	$	2,278.5	$	2,083.6	$	4,362.1	$	2,120.2	$	2,053.5	$	4,173.7

	Fiscal Year
(in millions)	2025						2024						2023
	HPMC		AA&S		Total		HPMC		AA&S		Total		HPMC		AA&S		Total
Primary Geographical Market:
United States	$	1,336.2	$	1,303.6	$	2,639.8	$	1,134.0	$	1,391.2	$	2,525.2	$	915.3	$	1,335.5	$	2,250.8
China	81.5		242.8		324.3		57.6		242.0		299.6		70.1		263.2		333.3
United Kingdom	222.0		55.2		277.2		217.0		40.9		257.9		224.8		34.3		259.1
Germany	160.2		67.2		227.4		202.5		57.2		259.7		204.2		38.8		243.0
France	156.0		90.2		246.2		186.9		40.6		227.5		172.4		47.0		219.4
Canada	90.7		78.8		169.5		60.9		55.3		116.2		64.9		46.1		111.0
Rest of World	395.1		307.9		703.0		419.6		256.4		676.0		468.5		288.6		757.1
Total	$	2,441.7	$	2,145.7	$	4,587.4	$	2,278.5	$	2,083.6	$	4,362.1	$	2,120.2	$	2,053.5	$	4,173.7

Comparative information of the Company’s major products based on their percentages of sales is included in the following table. HRPF conversion service sales in the AA&S segment are excluded from this presentation.

	Fiscal Year
	2025						2024						2023
	HPMC		AA&S		Total		HPMC		AA&S		Total		HPMC		AA&S		Total
Diversified Products:
Nickel-based alloys and specialty alloys	43	%	50	%	46	%	41	%	49	%	45	%	44	%	54	%	49	%
Precision forgings, castings and components	40	%	—	%	22	%	36	%	—	%	20	%	33	%	—	%	17	%
Titanium and titanium-based alloys	17	%	19	%	18	%	23	%	13	%	18	%	22	%	12	%	17	%
Zirconium and related alloys	—	%	19	%	9	%	—	%	19	%	9	%	—	%	15	%	7	%
Precision rolled strip	—	%	12	%	5	%	—	%	19	%	8	%	1	%	19	%	10	%
Total	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%	100	%

Schedule of Accounts Receivable - Reserve for Doubtful Accounts

The following represents the rollforward of accounts receivable - reserve for doubtful accounts for the fiscal years ended December 28, 2025, December 29, 2024 and December 31, 2023:

(in millions)
Accounts Receivable - Reserve for Doubtful Accounts
Balance as of January 1, 2023	$	7.7
Expense to increase the reserve	0.1
Write-off of uncollectible accounts	(4.6)
Balance as of December 31, 2023	3.2
Expense to increase the reserve	12.3
Write-off of uncollectible accounts	(0.5)
Balance as of December 29, 2024	15.0
Expense to increase the reserve	1.9
Write-off of uncollectible accounts	(12.7)
Balance as of December 28, 2025	$	4.2

Schedule of Contract Assets and Liabilities

The following represents the rollforward of contract assets and liabilities for the fiscal years ended December 28, 2025, December 29, 2024 and December 31, 2023:

(in millions)
Contract Assets
	Fiscal Year
Short-term	2025		2024		2023
Balance as of beginning of fiscal year	$	75.6	$	59.1	$	64.1
Recognized in current year	117.3		88.9		84.1
Reclassified to accounts receivable	(120.1)		(72.4)		(89.5)
Reclassification to/from contract liability	—		—		0.4
Balance as of period end	$	72.8	$	75.6	$	59.1

(in millions)
Contract Liabilities
	Fiscal Year
Short-term	2025		2024		2023
Balance as of beginning of fiscal year	$	169.4	$	163.6	$	149.1
Recognized in current year	158.8		133.6		133.4
Amounts in beginning balance reclassified to revenue	(109.1)		(88.2)		(107.9)
Current year amounts reclassified to revenue	(76.0)		(56.3)		(40.9)
Other	(2.0)		—		(0.7)
Reclassification to/from long-term and contract asset	5.3		16.7		30.6
Balance as of period end	$	146.4	$	169.4	$	163.6
	Fiscal Year
Long-term (a)	2025		2024		2023
Balance as of beginning of fiscal year	$	45.3	$	39.4	$	66.8
Recognized in current year	58.2		22.6		2.8
Amounts in beginning balance reclassified to revenue	(2.2)		—		—
Current year amounts reclassified to revenue	(1.8)		—		—
Other	(2.9)		—		—
Reclassification to/from short-term	(5.3)		(16.7)		(30.2)
Balance as of period end	$	91.3	$	45.3	$	39.4

(a) Long-term contract liabilities are included in Other long-term liabilities on the consolidated balance sheets.