Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)	3 Months Ended		12 Months Ended
	Dec. 30, 2016	Dec. 25, 2015	Sep. 25, 2015
Distributor Concentration Risk | Net Sales Attributable to Distributors | CuraScript, Inc
Concentration Risk [Line Items]
Concentration risk, percentage	43.00%	39.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | McKesson Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	16.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | CuraScript, Inc
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%		14.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	28.00%		30.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Cardinal Health, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%		10.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%		15.00%
Product Concentration Risk | Net Sales Attributable to Products | Acthar (Specialty Brands)
Concentration Risk [Line Items]
Concentration risk, percentage	39.00%	35.00%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	14.00%