Industry Segment and Geographic Area Information Schedule of Total Assets by Segment (Details) - USD ($) $ in Thousands	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Schedule of Total Assets, by segment [Line Items]
Assets	$ 5,975,522	$ 6,091,463
Diagnostics [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	3,358,964	3,447,437	$ 1,505,381
Discovery & Analytical Solutions [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	2,567,054	2,611,737	2,612,757
Corporate [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	49,504	32,289	31,171
Net current and long-term assets of discontinued operations [Member]
Schedule of Total Assets, by segment [Line Items]
Assets	$ 0	$ 0	127,374
Total assets [Member]
Schedule of Total Assets, by segment [Line Items]
Assets			$ 4,276,683