Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Deferred income tax assets
Net operating loss tax carryovers	$ 73.4	$ 133.0
Pensions	6.0	2.2
Postretirement benefits other than pensions	45.2	48.5
Tax credits	44.0	43.5
Research and development	25.7	20.7
Inventory valuation	24.3	1.1
Other items	102.8	107.5
Gross deferred income tax assets	321.4	356.5
Valuation allowance for deferred tax assets	(57.7)	(60.3)	$ (266.9)
Total deferred income tax assets	263.7	296.2
Deferred income tax liabilities
Bases of property, plant and equipment	180.5	124.8
Basis of amortizable intangible assets	13.4	14.9
Other items	28.0	25.5
Total deferred tax liabilities	221.9	165.2
Net deferred tax asset	$ 41.8	$ 131.0