Business Segments (Details3) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Segment Reporting Asset Reconciling Item [Line Items]
Assets	$ 5,230.6	$ 4,985.1	$ 4,445.6
Deferred taxes	263.7	296.2
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Segment Reporting Asset Reconciling Item [Line Items]
Deferred taxes	46.5	135.7	4.7
Cash and cash equivalents and other	750.4	861.8	710.5
HPMC
Segment Reporting Asset Reconciling Item [Line Items]
Assets	2,225.9	1,990.9	1,749.3
AA&S
Segment Reporting Asset Reconciling Item [Line Items]
Assets	$ 2,207.8	$ 1,996.7	$ 1,981.1