Commitments and Contingencies (Narrative) (Details) $ in Millions			1 Months Ended	3 Months Ended			6 Months Ended		9 Months Ended
	Apr. 01, 2014 USD ($) Defendent	Sep. 26, 2012 action	Aug. 31, 2012 principal	Mar. 25, 2016 USD ($) Case	Jun. 26, 2015 USD ($)	Mar. 27, 2015 USD ($)	Mar. 25, 2016 USD ($) Case Defendent	Mar. 27, 2015 USD ($)	Jun. 26, 2015 USD ($)	Mar. 28, 2014 USD ($)	Aug. 31, 2013 Case
Loss Contingencies [Line Items]
Litigation Settlement, Expense					$ 15.5
Environmental liabilities				$ 75.3			$ 75.3
Deferred tax liabilities related to installment sales				2,206.6			2,206.6
Section 453(a) interest				19.1		$ 11.4	37.8	$ 14.2
Environmental Remediation
Loss Contingencies [Line Items]
Remedial cost range, minimum				39.0			39.0
Remedial cost range, maximum				120.0			$ 120.0
Lower Passaic River, New Jersey
Loss Contingencies [Line Items]
Number of defendants | Defendent	70						98
Remedial cost range, minimum	$ 365.0			483.4			$ 483.4
Remedial cost range, maximum	3,200.0			2,700.0			2,700.0
Environmental liabilities						$ 13.3		13.3		$ 23.1
Remedial cost, estimate	$ 1,700.0			$ 1,380.0			$ 1,380.0
Asbestos Matters
Loss Contingencies [Line Items]
Pending claims | Case				13,000			13,000
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				$ 2.8			$ 2.8
Glenridge Litigation
Loss Contingencies [Line Items]
Number of defendants | principal			3
Pending claims | Case											1
Questcor Securities Litigation
Loss Contingencies [Line Items]
Subsequent actions consolidated into lawsuit | action		4
Litigation Settlement, Amount									$ 38.0
Loss Contingency Accrual					$ 38.0				$ 38.0
Mallinckrodt Veterinary, Inc., Millsboro, Delaware [Member]
Loss Contingencies [Line Items]
Number of Administrative Orders of Consent Entered Into				2
Tax Matters Agreement | Covidien
Loss Contingencies [Line Items]
Tax agreement, tax threshold				$ 200.0			200.0
Industrial Revenue Bonds
Loss Contingencies [Line Items]
Plant assets exchanged for IRBs							$ 88.0
Tastemaker [Member]
Loss Contingencies [Line Items]
Indemnification								$ 22.5