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Revenues - Major Products and Services in Reportable Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 4,540,029	$ 5,158,557	$ 4,845,872
Process and analytical instrumentation
Disaggregation of Revenue [Line Items]
Net sales	2,199,167	2,393,587	2,120,448
Aerospace and power
Disaggregation of Revenue [Line Items]
Net sales	1,257,104	1,420,465	1,365,028
Automation and engineered solutions
Disaggregation of Revenue [Line Items]
Net sales	1,083,758	1,344,505	1,360,396
EIG
Disaggregation of Revenue [Line Items]
Net sales	2,989,928	3,322,881	3,028,959
EIG | Process and analytical instrumentation
Disaggregation of Revenue [Line Items]
Net sales	2,199,167	2,393,587	2,120,448
EIG | Aerospace and power
Disaggregation of Revenue [Line Items]
Net sales	790,761	929,294	908,511
EIG | Automation and engineered solutions
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
EMG
Disaggregation of Revenue [Line Items]
Net sales	1,550,101	1,835,676	1,816,913
EMG | Process and analytical instrumentation
Disaggregation of Revenue [Line Items]
Net sales	0	0	0
EMG | Aerospace and power
Disaggregation of Revenue [Line Items]
Net sales	466,343	491,171	456,517
EMG | Automation and engineered solutions
Disaggregation of Revenue [Line Items]
Net sales	$ 1,083,758	$ 1,344,505	$ 1,360,396

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