Income Taxes - Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 26, 2025	Dec. 27, 2024
Deferred tax liabilities:
Allowances and other accrued liabilities	$ (2.0)	$ (0.5)
Inventories	(16.0)	(16.8)
Property, plant and equipment	(65.1)	(69.8)
Equity in earnings of unconsolidated companies	(6.0)	(2.7)
Pension obligations	(3.1)	(2.7)
Other noncurrent deferred tax liabilities	(27.1)	(26.8)
ROU assets	(24.8)	(17.8)
Total noncurrent deferred tax liabilities	(144.1)	(137.1)
Deferred tax assets:
Allowances and other accrued assets	21.3	19.0
Inventories	3.1	6.2
Pension obligations	26.6	23.2
Property, plant and equipment	3.1	2.9
Post-retirement benefits other than pension	0.9	2.8
Net operating loss carryforwards	418.1	408.0
Capital loss carryover	4.1	3.2
Other noncurrent assets	123.6	124.5
Operating lease	28.4	19.4
Total noncurrent deferred tax assets	629.2	609.2
Valuation allowance	(518.8)	(499.8)
Total deferred tax assets, net	110.4	109.4
Net deferred tax liabilities	$ (33.7)	$ (27.7)