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Acquisitions - Additional Information (Detail) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) Acquisition | Dec. 31, 2020 USD ($)
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 |
Business combination, contingent consideration, liability, measurement input | 14.0 |
Increase in fair value of contingent consideration liability | $ 1,000,000 |
Goodwill | 66,000,000 | $ 0
Intangible assets | $ 11,000,000 |
Business combination, fair value measurement period | one year |
Acquisition related costs | $ 2,000,000 |
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 |
Acquisition One [Member] |  |
Business Acquisition [Line Items] |  |
Earn Out Period | 3 years 3 months |
Acquisition Two [Member] |  |
Business Acquisition [Line Items] |  |
Earn Out Period | 1 year |
Minimum [Member] | Acquisition Two [Member] |  |
Business Acquisition [Line Items] |  |
Undiscounted out come from acquisition | $ 0 |
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 |
Undiscounted out come from acquisition | $ 45,000,000 |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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