Percentage of Revenue from Significant Customers (Detail) - Customer Concentration Risk - Sales Revenue	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017
MilliporeSigma
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue	11.00%	13.00%	15.00%
Cytiva (formerly GE Healthcare)
Revenue, Major Customer [Line Items]
Revenue from significant customers as a percentage of total revenue		12.00%	15.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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