Revenue - Additional Information (Detail)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Direct Sales [Member] \| Customer Concentration Risk [Member]
Disaggregation Of Revenue [Line Items]
Direct sales, percentage of net sales	18.00%	18.00%	19.00%

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
-Publisher FASB
-Name Accounting Standards Codification
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