Restructuring and Contract Termination Charges, Net Restructuring and Contract Termination Charges, Net (Schedule of Initial Charges) (Details) $ in Thousands	3 Months Ended											12 Months Ended
	Dec. 29, 2019 USD ($) employees	Sep. 29, 2019 USD ($)	Jun. 30, 2019 USD ($) employees	Mar. 31, 2019 USD ($) employees	Dec. 30, 2018 USD ($) employees	Sep. 30, 2018 USD ($) employees	Jul. 01, 2018 USD ($)	Apr. 01, 2018 USD ($) employees	Dec. 31, 2017 USD ($) employees	Oct. 01, 2017 USD ($) employees	Apr. 02, 2017 USD ($) employees	Dec. 29, 2019 USD ($)	Dec. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net	$ 1,560	$ 14,068	$ 6,161	$ 7,639	$ (1,942)	$ 6,508	$ 0	$ 6,578				$ 29,428	$ 11,144	$ 12,657
Q4 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees	22
Restructuring and other costs, net	$ 2,581
Q3 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees	259
Restructuring and other costs, net		13,797
Q2 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees			44
Restructuring and other costs, net			$ 5,590
Q1 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees				105
Restructuring and other costs, net				$ 7,460
Q4 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees					1
Restructuring and other costs, net					$ 348
Q3 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees						61
Restructuring and other costs, net						$ 1,764
Q1 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees								47
Restructuring and other costs, net								$ 5,998
Q4 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees									29
Restructuring and other costs, net									$ 1,935
Q3 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees										27
Restructuring and other costs, net										$ 2,342
Q1 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | employees											90
Restructuring and other costs, net											$ 6,697
Diagnostics [Member] | Severance [Member] | Q4 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net	$ 2,404
Diagnostics [Member] | Severance [Member] | Q3 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net		2,641
Diagnostics [Member] | Severance [Member] | Q2 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net			1,129
Diagnostics [Member] | Severance [Member] | Q1 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net				1,459
Diagnostics [Member] | Severance [Member] | Q4 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net					0
Diagnostics [Member] | Severance [Member] | Q3 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net						618
Diagnostics [Member] | Severance [Member] | Q1 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net								902
Diagnostics [Member] | Severance [Member] | Q4 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net									255
Diagnostics [Member] | Severance [Member] | Q3 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net										1,021
Diagnostics [Member] | Severance [Member] | Q1 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net											1,631
Diagnostics [Member] | Facility Closing [Member] | Q4 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net	0
Diagnostics [Member] | Facility Closing [Member] | Q3 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net		0
Diagnostics [Member] | Facility Closing [Member] | Q2 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net			0
Diagnostics [Member] | Facility Closing [Member] | Q1 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net				0
Diagnostics [Member] | Facility Closing [Member] | Q4 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net					0
Diagnostics [Member] | Facility Closing [Member] | Q3 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net						0
Diagnostics [Member] | Facility Closing [Member] | Q1 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net								0
Diagnostics [Member] | Facility Closing [Member] | Q4 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net									0
Diagnostics [Member] | Facility Closing [Member] | Q3 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net										0
Diagnostics [Member] | Facility Closing [Member] | Q1 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net											33
Discovery & Analytical Solutions [Member] | Severance [Member] | Q4 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net	177
Discovery & Analytical Solutions [Member] | Severance [Member] | Q3 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net		11,156
Discovery & Analytical Solutions [Member] | Severance [Member] | Q2 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net			4,461
Discovery & Analytical Solutions [Member] | Severance [Member] | Q1 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net				6,001
Discovery & Analytical Solutions [Member] | Severance [Member] | Q4 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net					348
Discovery & Analytical Solutions [Member] | Severance [Member] | Q3 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net						1,146
Discovery & Analytical Solutions [Member] | Severance [Member] | Q1 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net								5,096
Discovery & Analytical Solutions [Member] | Severance [Member] | Q4 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net									1,680
Discovery & Analytical Solutions [Member] | Severance [Member] | Q3 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net										1,321
Discovery & Analytical Solutions [Member] | Severance [Member] | Q1 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net											5,000
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q4 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net	$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q3 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net		$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q2 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net			$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q1 2019 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net				$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q4 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net					$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q3 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net						$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q1 2018 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net								$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q4 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net									$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q3 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net										$ 0
Discovery & Analytical Solutions [Member] | Facility Closing [Member] | Q1 2017 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other costs, net											$ 33