Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)	3 Months Ended		12 Months Ended
	Dec. 25, 2015	Dec. 26, 2014	Sep. 25, 2015
Distributor Concentration Risk | Net Sales Attributable to Distributors | CuraScript, Inc
Concentration Risk [Line Items]
Concentration risk, percentage	32.00%	35.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | McKesson Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	17.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | Cardinal Health, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	8.00%	15.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | CuraScript, Inc
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%		16.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	25.00%		24.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Cardinal Health, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%		13.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%		12.00%
Product Concentration Risk | Net Sales Attributable to Products | Acthar (Specialty Brands)
Concentration Risk [Line Items]
Concentration risk, percentage	31.00%	35.00%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%	0.00%