Business Segments - Schedule of Identifiable Assets (Details) - USD ($) $ in Millions	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 5,099.6	$ 5,230.6	$ 4,985.1
Deferred Taxes	209.0	263.7
Corporate:
Segment Reporting Asset Reconciling Item [Line Items]
Deferred Taxes	33.5	46.5	135.7
Cash and cash equivalents and other	448.4	750.4	861.8
HPMC
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	2,368.6	2,225.9	1,990.9
AA&S
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 2,249.1	$ 2,207.8	$ 1,996.7