Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,717,930	$ 3,085,177	$ 3,008,652
Net Sales	3,717,930	3,085,177	3,008,652
Revenues	3,717,930	3,085,177	3,008,652
Contract with Customer, Asset, after Allowance for Credit Loss	32,100	22,600
Contract with Customer, Liability	192,648	149,106	122,489	$ 105,381
Customer prepayments and deferred revenue	711,067	617,643	633,190
Contract with Customer, Liability, Revenue Recognized	(667,245)	(595,802)	(615,957)
Temporary Equity, Foreign Currency Translation Adjustments	(280)	4,776	(125)
Americas [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,419,832
Net Sales		1,180,626
Europe [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,062,961
Net Sales		921,266
Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,235,137
Net Sales		983,285
Product [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,960,615	2,405,172	2,346,845
Product [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,960,615	2,405,172	2,346,845
Service [Member]
Disaggregation of Revenue [Line Items]
Revenues	757,315	680,005	661,807
Service [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	565,929	508,020	511,459
Service [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 191,386	171,985	150,348
Laboratory products and services [Member]
Disaggregation of Revenue [Line Items]
Percentage of Disaggregated Revenue in Relationship to Segments	56.00%
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,083,025
Revenues		1,669,791	1,578,625
Industrial products and services [Member]
Disaggregation of Revenue [Line Items]
Percentage of Disaggregated Revenue in Relationship to Segments	39.00%
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,446,544
Revenues		1,224,497	1,233,970
Retail products and services [Member]
Disaggregation of Revenue [Line Items]
Percentage of Disaggregated Revenue in Relationship to Segments	5.00%
Revenue from Contract with Customer, Excluding Assessed Tax	$ 188,361
Revenues		190,889	196,057
US Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,287,983	1,072,319	1,057,115
US Operations [Member] | Product [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,004,891	815,046	801,181
US Operations [Member] | Service [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	218,306	199,247	207,707
US Operations [Member] | Service [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	64,786	58,026	48,227
Swiss Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	171,633	143,923	139,499
Swiss Operations [Member] | Product [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	135,987	112,542	110,390
Swiss Operations [Member] | Service [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	26,764	22,733	20,968
Swiss Operations [Member] | Service [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	8,882	8,648	8,141
Western European Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	829,761	716,715	700,741
Western European Operations [Member] | Product [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	600,527	509,385	500,978
Western European Operations [Member] | Service [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	151,656	135,793	135,612
Western European Operations [Member] | Service [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	77,578	71,537	64,151
Chinese Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	771,651	578,610	544,716
Chinese Operations [Member] | Product [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	707,355	526,231	495,579
Chinese Operations [Member] | Service [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	48,343	39,705	37,370
Chinese Operations [Member] | Service [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	15,953	12,674	11,767
Other Operations [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	656,902	573,610	566,581
Other Operations [Member] | Product [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	511,855	441,968	438,717
Other Operations [Member] | Service [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	120,860	110,542	109,802
Other Operations [Member] | Service [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 24,187	$ 21,100	$ 18,062