Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 25, 2016	Mar. 27, 2015	Mar. 25, 2016	Mar. 27, 2015	Sep. 25, 2015
Distributor Concentration Risk | Net Sales Attributable to Distributors | CuraScript, Inc
Concentration Risk [Line Items]
Concentration risk, percentage	30.00%	28.00%	31.00%	31.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | McKesson Corporation
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%	21.00%	13.00%	19.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | Cardinal Health, Inc.
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	14.00%	9.00%	14.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | CuraScript, Inc
Concentration Risk [Line Items]
Concentration risk, percentage			13.00%		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			11.00%		12.00%
Product Concentration Risk | Net Sales Attributable to Products | Acthar (Specialty Brands)
Concentration Risk [Line Items]
Concentration risk, percentage	27.00%	28.00%	29.00%	31.00%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%	0.00%	12.00%	0.00%