Commitments and Contingencies (Narrative) (Details)		1 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 26, 2012 action	Aug. 31, 2013 lawsuit Case	Aug. 31, 2012 principal	Aug. 31, 2011 Patents	Dec. 26, 2014	Jun. 26, 2015 USD ($)	Sep. 25, 2015 USD ($) Defendent Case order	Sep. 26, 2014 USD ($)	Sep. 27, 2013 USD ($)	Apr. 11, 2014 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Plant Assets Exchanged for Industrial Revenue Bonds							$ 88,000,000
Deferred Tax Liabilities Installment Sales							1,447,400,000
Interest Expense, Installment Sales							36,500,000
Rent expense							24,300,000	$ 15,200,000	$ 13,700,000
Loss Contingencies [Line Items]
Remedial cost range, minimum							39,800,000
Remedial cost range, maximum							113,100,000
Environmental liabilities							76,500,000
Tax Matters Agreement | Covidien
Loss Contingencies [Line Items]
Tax agreement, tax threshold							200,000,000
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Remedial cost range, minimum							483,400,000
Remedial cost range, maximum							2,700,000,000
Environmental liabilities							$ 13,300,000
Asbestos Matters
Loss Contingencies [Line Items]
Pending claims | Case							12,750
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							$ 3,200,000
'222 and '218 Patent Litigation: Exela Pharma Sciences, LLC
Loss Contingencies [Line Items]
Patents allegedly infringed | Patents				2
Loss Contingency, Claims Settled, Number | Case							4
Retrophin Litigation [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Expense							$ 15,500,000
Glenridge Litigation
Loss Contingencies [Line Items]
Number of defendants | principal			3
Loss Contingency, Lawsuits, Number | lawsuit		2
Pending claims | Case		1
Questcor Securities Litigation [Member]
Loss Contingencies [Line Items]
Filed-actions consolidated into the lawsuit | action	4
Litigation Settlement, Amount						$ 38,000,000
Loss Contingency, Accrual, Current						$ 38,000,000
David Taban, et al. v. Questcor Pharmaceuticals, Inc
Loss Contingencies [Line Items]
Federal derivative action staying period a					60 days
Federal derivative action staying period b					60 days
Mallinckrodt Veterinary, Inc., Millsboro, Delaware
Loss Contingencies [Line Items]
Number of Administrative Orders of Consent Entered Into | order							2
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Number of defendants | Defendent							70
Remedial cost range, minimum										$ 365,000,000
Remedial cost range, maximum										3,200,000,000
Environmental liabilities										23,100,000
Remedial cost, estimate										$ 1,700,000,000
Questcor Shareholder Derivative Litigation [Member]
Loss Contingencies [Line Items]
Filed-actions consolidated into the lawsuit | action	5
Federal derivative action staying period a					60 days
Federal derivative action staying period b					60 days
Tastemaker
Loss Contingencies [Line Items]
Provision for Loss (Gain) on Disposal, Net of Tax							$ 22,500,000