Accumulated Other Comprehensive Loss - Reclassification from OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2025	Dec. 27, 2024	Dec. 29, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	$ (4,322.3)	$ (4,280.2)	$ (4,320.7)
Cost of products sold	(3,923.2)	(3,922.3)	(3,970.0)
Interest expense	(11.2)	(18.4)	(24.1)
Asset impairment charges	55.4	3.7	$ 141.3
Reclassification out of Accumulated Other Comprehensive Income | Retirement Benefit Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense, net	0.5	0.5
Total	1.0	0.8
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Adjustment, Curtailment And Settlement Gains And Losses, Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense, net	0.2	0.3
Asset impairment charges	(0.3)	0.0
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	13.0	(4.1)
Cost of products sold	(2.7)	3.5
Interest expense	(2.7)	(6.6)
Total	$ 7.6	$ (7.2)