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Revenues - Revenues Disaggregated by Significant Customer (Details) - Revenue - Customer Concentration Risk	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Ipsen Pharma SAS (Ipsen)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	20.00%	9.00%	17.00%	10.00%
Affiliates of CVS Health Corporation
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	13.00%	15.00%	15.00%	15.00%
Affiliates of McKesson Corporation
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	11.00%	13.00%	13.00%	12.00%
Affiliates of AmerisourceBergen Corporation
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	11.00%	10.00%	11.00%	10.00%
Affiliates of Optum Specialty Pharmacy
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	10.00%	8.00%	11.00%	8.00%
Takeda Pharmaceutical Company Limited (Takeda)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	10.00%	1.00%	5.00%	3.00%
Accredo Health, Incorporated
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Percent of total revenues	10.00%	8.00%	9.00%	9.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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- Definition

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+ References

No definition available.

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