Business Segment Information - Additional Information (Detail) - People's Republic of China, including Hong Kong - Geographic Concentration Risk	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Revenues
Concentration Risk [Line Items]
Concentration percentage	23.00%	27.00%
Operating Income
Concentration Risk [Line Items]
Concentration percentage	25.00%	29.00%

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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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