Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)	3 Months Ended
	Mar. 31, 2017	Dec. 30, 2016	Mar. 25, 2016
Distributor Concentration Risk | Net Sales Attributable to Distributors | McKesson Corporation
Concentration Risk
Concentration Risk, Percentage	10.00%		13.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | CuraScript, Inc
Concentration Risk
Concentration Risk, Percentage	36.00%		34.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation
Concentration Risk
Concentration Risk, Percentage	28.00%	28.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation
Concentration Risk
Concentration Risk, Percentage	14.00%	15.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | CuraScript, Inc
Concentration Risk
Concentration Risk, Percentage	17.00%	15.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Cardinal Health, Inc.
Concentration Risk
Concentration Risk, Percentage	11.00%	10.00%
Product Concentration Risk | Net Sales Attributable to Products | Acthar
Concentration Risk
Concentration Risk, Percentage	34.00%		30.00%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk
Concentration Risk, Percentage	16.00%		14.00%