Commitments and Contingencies (Narrative) (Details)	May 01, 2007 Defendent	Dec. 27, 2024 USD ($)	Dec. 29, 2023 USD ($)	Nov. 21, 2023 USD ($)	Nov. 14, 2023 USD ($)	Aug. 24, 2023 USD ($)	Aug. 23, 2023 USD ($)	Jun. 16, 2023 USD ($)	Sep. 09, 2022 USD ($)	Jun. 16, 2022 USD ($)	Sep. 28, 2021 USD ($)	Aug. 07, 2018 USD ($)	Mar. 04, 2016 USD ($)	Apr. 11, 2014 USD ($)
Loss Contingencies [Line Items]
Environmental liabilities		$ 35,500,000
Environmental liabilities, current		1,200,000
Environmental liabilities		34,300,000	$ 35,100,000
Debt instrument, face amount		$ 865,600,000	1,647,800,000
Opioid-Related Litigation Settlement, Payment Year One								$ 200,000,000
Opioid-Related Litigation Settlement, Final Payment						$ 250,000,000
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]
Reorganization Items. Makewhole Claim, 2025 First Lien Senior Secured Notes							$ 14,900,000
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Loss Contingency, Settlement Agreement, Amount									$ 300,000			$ 300,000
Remedial cost, estimate													$ 1,380,000,000	$ 1,700,000,000
Upper 9 Miles, Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Remedial cost, estimate		$ 21,100,000									$ 441,000,000
Legal contingency, cost reopener				$ 3,700,000,000
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Number of defendants | Defendent	70
Medicaid Lawsuit [Member]
Loss Contingencies [Line Items]
Remedial cost, estimate										$ 640,000,000
Stougo Matter
Loss Contingencies [Line Items]
Loss Contingency Accrual		46,000,000
Minimum
Loss Contingencies [Line Items]
Remedial cost, estimate		17,000,000.0
Minimum | Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Remedial cost, estimate														365,000,000.0
Maximum
Loss Contingencies [Line Items]
Remedial cost, estimate		51,400,000
Maximum | Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Remedial cost, estimate														$ 3,200,000,000
Fair Value, Measurements, Recurring
Loss Contingencies [Line Items]
Contingent consideration		17,500,000	14,700,000		$ 15,000,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Loss Contingencies [Line Items]
Contingent consideration		$ 17,500,000	$ 14,700,000