Industry Segment and Geographic Area Information Schedule of Total Assets by Segment (Details) - USD ($) $ in Thousands	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Schedule of Total Assets, by segment [Line Items]
Assets	$ 7,960,315	$ 6,538,564
Diagnostics [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	4,228,943	3,368,598	$ 3,358,964
Discovery & Analytical Solutions [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	3,600,860	3,082,917	2,567,054
Corporate [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	$ 130,512	$ 87,049	49,504
All Segments [Member]
Schedule of Total Assets, by segment [Line Items]
Assets			$ 5,975,522