Contingencies (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Contingencies
Accrued liabilities, environmental remediation		$ 25.0
Environmental liabilities	$ 20.9		$ 23.3
Recovery of direct costs		47.3
Proceeds from legal settlements	$ 62.2
Huntsville Site
Contingencies
Environmental remediation expense to date		9.0
Project expenditures, low estimate		5.3
Project expenditures, high estimate		17.0
Norco Site | Remediation Project Management Regulatory Oversight and Investigative and Feasibility Studies
Contingencies
Environmental remediation expense to date		85.5
Project expenditures, low estimate		19.7
Project expenditures, high estimate		$ 35.9