Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Dec. 30, 2016	Jun. 24, 2016	Jun. 30, 2017	Jun. 24, 2016
Distributor Concentration Risk | Net Sales Attributable to Distributors | McKesson Corporation
Concentration Risk
Concentration Risk, Percentage	8.00%		7.00%	9.00%	10.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | CuraScript, Inc
Concentration Risk
Concentration Risk, Percentage	43.00%		38.00%	39.00%	36.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation
Concentration Risk
Concentration Risk, Percentage	26.00%	28.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation
Concentration Risk
Concentration Risk, Percentage	15.00%	15.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | CuraScript, Inc
Concentration Risk
Concentration Risk, Percentage	18.00%	15.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Cardinal Health, Inc.
Concentration Risk
Concentration Risk, Percentage	9.00%	10.00%
Product Concentration Risk | Net Sales Attributable to Products | Acthar
Concentration Risk
Concentration Risk, Percentage	39.00%		34.00%	36.00%	33.00%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk
Concentration Risk, Percentage	15.00%		14.00%	16.00%	14.00%