Commitments and Contingencies (Narrative) (Details)			3 Months Ended		6 Months Ended
	Jun. 30, 2018 Defendent	Apr. 01, 2014 USD ($) Defendent	Jun. 28, 2019 USD ($) Case	Sep. 28, 2018 USD ($)	Jun. 28, 2019 USD ($) lawsuit Case Defendent	Jun. 29, 2018 USD ($)	Dec. 28, 2018 USD ($)	Aug. 07, 2018 USD ($)	Mar. 25, 2016 USD ($)
Loss Contingencies [Line Items]
Environmental liabilities			$ 62,300,000		$ 62,300,000
Deferred Tax Liabilities Installment Sales			0		0		$ 227,500,000
Section 453(a) interest						$ 11,700,000
Interest Payable, Installment Sales			47,400,000		47,400,000		$ 56,000,000.0
Decrease, Interest Payable, Installment Sales			8,600,000
Questcor Subpoena [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			$ 15,400,000		$ 15,400,000
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Number of defendants | Defendent		70
Environmental liabilities				$ 26,200,000
Remedial cost, estimate		$ 1,700,000,000							$ 1,380,000,000
Loss Contingency, Settlement Agreement, Amount								$ 280,600
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)				$ (11,800,000)
Occidental, Lower Passaic River [Member]
Loss Contingencies [Line Items]
Number of defendants | Defendent	120
Asbestos Matters
Loss Contingencies [Line Items]
Pending claims | Case			11,700		11,700
Estimation of liability, historical term					5 years
Estimation of liability, expected future term of claims					7 years
Accrued and other current liabilities
Loss Contingencies [Line Items]
Environmental liabilities, current			$ 1,800,000		$ 1,800,000
Minimum | Medicaid Lawsuit [Member]
Loss Contingencies [Line Items]
Remedial cost, estimate			0		0
Minimum | Environmental Remediation
Loss Contingencies [Line Items]
Remedial cost, estimate			36,900,000		36,900,000
Minimum | Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Remedial cost, estimate		365,000,000.0
Maximum | Medicaid Lawsuit [Member]
Loss Contingencies [Line Items]
Remedial cost, estimate			600,000,000.0		600,000,000.0
Maximum | Environmental Remediation
Loss Contingencies [Line Items]
Remedial cost, estimate			$ 86,100,000		$ 86,100,000
Maximum | Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Remedial cost, estimate		$ 3,200,000,000
Opioid crisis [Member] | Cities, Counties, and/or Other Government-related Persons/Entities [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | lawsuit					2,153
Opioid crisis [Member] | Hospitals, Health Systems, Unions, Health and Welfare Fund or Third-Party Payers [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | lawsuit					140
Opioid crisis [Member] | Individuals [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | lawsuit					103
Opioid crisis [Member] | State Attorney Generals [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | lawsuit					10
Opioid crisis [Member] | U.S. States [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Plaintiffs | lawsuit					235
U.S. House Committee Investigation [Member]
Loss Contingencies [Line Items]
Number of defendants | Defendent					11