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Collaboration Agreements (Invenra Collaboration, Narrative) (Details) - Collaborative Arrangement With Invenra - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Discovery Project
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Project initiation fee	$ 7.0	$ 4.0
Upfront and milestone payments	2.0
Development and Regulatory Milestone
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Eligible payment from collaboration for development and regulatory milestone achievement under collaborations agreement	131.5
Additional Development and Regulatory Milestone
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Project initiation fee	43.4
Upfront and milestone payments	1.5
Product Commercialization
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Eligible payment from collaboration for development and regulatory milestone achievement under collaborations agreement	$ 325.0

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- Definition

Eligible Payment From Collaboration For Development And Regulatory Milestone Achievement Under Collaborations Agreement

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No definition available.

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