Commitments and Contingencies (Narrative) (Details)		3 Months Ended
	May 01, 2007 Defendent	Mar. 28, 2025 USD ($)	Dec. 27, 2024 USD ($)	Mar. 29, 2024 USD ($)	Nov. 21, 2023 USD ($)	Nov. 14, 2023 USD ($) Rate	Sep. 09, 2022 USD ($)	Sep. 28, 2021 USD ($)	Aug. 07, 2018 USD ($)	Mar. 04, 2016 USD ($)	Apr. 11, 2014 USD ($)
Loss Contingencies [Line Items]
Environmental liabilities		$ 35,300,000
Environmental liabilities, current				$ 1,000,000.0
Environmental liabilities		34,300,000	$ 34,300,000
Debt Instrument, Face Amount		864,600,000	$ 865,600,000
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants | Defendent	70
Continental General
Loss Contingencies [Line Items]
Litigation Settlement, Loss		5,500,000
Loss Contingency Accrual		4,400,000
Loss Contingency, Receivable		500,000
Stougo Matter
Loss Contingencies [Line Items]
Loss Contingency Accrual		46,000,000
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss										$ 1,380,000,000	$ 1,700,000,000
Loss Contingency, Settlement Agreement, Amount							$ 300,000		$ 300,000
Upper 9 Miles, Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		21,100,000						$ 441,000,000
Legal contingency, cost reopener					$ 3,700,000,000
Minimum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		16,800,000
Minimum | Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss											365,000,000
Maximum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		$ 52,000,000
Maximum | Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss											$ 3,200,000,000
Fourteen Point Seven Five Percent Second-Out Takeback Notes
Loss Contingencies [Line Items]
Debt Instrument, Face Amount						$ 778,600,000
Debt Instrument, Interest Rate, Stated Percentage | Rate						14.75%