Business Segments (Details3) - USD ($) $ in Millions	Sep. 28, 2025	Dec. 29, 2024
Segment Reporting Asset Reconciling Item [Line Items]
Assets	$ 5,002.7	$ 5,230.6
Corporate:
Segment Reporting Asset Reconciling Item [Line Items]
Deferred Taxes	37.3	46.5
Cash and cash equivalents and other	384.2	750.4
HPMC
Segment Reporting Asset Reconciling Item [Line Items]
Assets	2,340.4	2,225.9
AA&S
Segment Reporting Asset Reconciling Item [Line Items]
Assets	$ 2,240.8	$ 2,207.8