Financial Instruments and Fair Value Measurements (Narrative) (Details) CAD in Millions, $ in Millions	3 Months Ended
	Dec. 25, 2015 CAD	Dec. 25, 2015 USD ($)	Dec. 25, 2015 CAD	Sep. 25, 2015 USD ($)	Apr. 30, 2013
Senior Notes | 3.50% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					3.50%
Senior Notes | 4.75% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					4.75%
BioVectra, Inc. | Questcor Pharmaceuticals, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of contingent liability | CAD			CAD 50.0
Payments | CAD	CAD 40.0
Level 3 | Secured Debt | 4.00% Term Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.00%	4.00%
Level 3 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash surrender value of life insurance		$ 67.9		$ 67.7
Level 3 | Recurring | CNS Therapeutics, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of contingent consideration		7.2
Level 3 | Recurring | Questcor Pharmaceuticals, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of contingent liability		$ 139.2
Level 1 | Senior Notes | 3.50% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.50%	3.50%
Level 1 | Senior Notes | 4.75% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.75%	4.75%
Level 1 | Senior Notes | 5.75% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.75%	5.75%
Level 1 | Senior Notes | 4.88% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.875%	4.875%
Level 1 | Senior Notes | 5.50% Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.50%	5.50%
Level 1 | Unsecured Debt | Five Point Six Two Five Percent Note [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.625%	5.625%
Level 1 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash		$ 66.5		$ 66.3