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Segment Information - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
Segment Reporting [Abstract]
Number of business segments | segment			2
Segment Reporting Information [Line Items]
Profit included in operating income	$ 27,700,000	$ 49,400,000	$ 39,300,000	$ 127,600,000
Technology
Segment Reporting Information [Line Items]
Profit included in operating income	24,900,000	31,800,000	68,100,000	111,400,000
Technology | Other Technology | Segment Reconciling Items
Segment Reporting Information [Line Items]
Profit included in operating income	$ 5,300,000	$ 0	$ 5,300,000	$ 200,000

X

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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-Publisher FASB
-Name Accounting Standards Codification
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The net result for the period of deducting operating expenses from operating revenues.

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