Business Segments - Schedule of Identifiable Assets (Details) - USD ($) $ in Millions	Mar. 29, 2026	Dec. 28, 2025
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 5,234.1	$ 5,099.6
Corporate:
Segment Reporting Asset Reconciling Item [Line Items]
Deferred Taxes	35.6	33.5
Cash and cash equivalents and other	438.4	448.4
HPMC
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	2,267.1	2,368.6
AA&S
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 2,493.0	$ 2,249.1