Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 27, 2025	Jun. 28, 2024	Jun. 27, 2025	Jun. 28, 2024	Dec. 27, 2024
Distributor Concentration Risk | Revenue from Contract with Customer Benchmark [Member] | Amerisource Bergen Corporation [Member]
Concentration Risk
Concentration Risk, Percentage	18.60%	16.80%	19.80%	16.00%
Distributor Concentration Risk | Revenue from Contract with Customer Benchmark [Member] | FFF Enterprises, Inc.
Concentration Risk
Concentration Risk, Percentage	34.20%	21.60%	30.90%	20.90%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation [Member]
Concentration Risk
Concentration Risk, Percentage			39.40%		34.90%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation [Member]
Concentration Risk
Concentration Risk, Percentage			16.60%		19.80%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | FFF Enterprises, Inc.
Concentration Risk
Concentration Risk, Percentage			13.90%		12.10%
Product Concentration Risk | Net Sales Attributable to Products | Acthar
Concentration Risk
Concentration Risk, Percentage	36.10%	22.90%	32.10%	22.50%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk
Concentration Risk, Percentage	12.80%	12.90%	13.70%	13.90%
Product Concentration Risk | Net Sales Attributable to Products | Therakos [Member]
Concentration Risk
Concentration Risk, Percentage		13.10%		12.80%
Product Concentration Risk | Net Sales Attributable to Products | APAP
Concentration Risk
Concentration Risk, Percentage				10.10%