Segment Information - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment Reporting [Abstract]
Number of business segments | segment			2
Segment Reporting Information [Line Items]
Profit included in operating income	$ (8,500,000)	$ 53,000,000.0	$ 11,600,000	$ 78,200,000
Technology
Segment Reporting Information [Line Items]
Profit included in operating income	1,000,000.0	51,300,000	43,200,000	79,600,000
Technology | Other Technology | Segment Reconciling Items
Segment Reporting Information [Line Items]
Profit included in operating income	$ 0	$ 0	$ 0	$ 200,000