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Acquisitions - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021 USD ($) Acquisition
Business Acquisition [Line Items]
Number of acquisitions | Acquisition	2
Purchase price consideration	$ 119,000,000
Aggregate purchase price cash consideration, including working capital adjustments	96,000,000
Contingent consideration	23,000,000
Goodwill	66,000,000
Intangible assets	$ 11,000,000
Business combination, fair value measurement period	one year
Acquisition related costs	$ 1,000,000
Other Current Liabilities [Member]
Business Acquisition [Line Items]
Contingent consideration	19,000,000
Other Long-term Liabilities [Member]
Business Acquisition [Line Items]
Contingent consideration	$ 4,000,000
Minimum [Member]
Business Acquisition [Line Items]
Business combination, contingent consideration, liability, measurement input	14.5
Maximum [Member]
Business Acquisition [Line Items]
Business combination, contingent consideration, liability, measurement input	14.7
Maximum [Member] | Acquisition One [Member]
Business Acquisition [Line Items]
Payment for contingent	$ 6,000,000
Maximum [Member] | Acquisition Two [Member]
Business Acquisition [Line Items]
Payment for contingent	$ 0

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