Industry Segment and Geographic Area Information Schedule of Total Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Schedule of Total Assets, by segment [Line Items]
Assets	$ 6,538,564	$ 5,975,522
Diagnostics [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	3,368,598	3,358,964	$ 3,447,437
Discovery & Analytical Solutions [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	3,082,917	2,567,054	2,611,737
Corporate [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	$ 87,049	$ 49,504	32,289
Total assets [Member]
Schedule of Total Assets, by segment [Line Items]
Assets			$ 6,091,463