Segment Information - Additional Information (Detail) $ in Millions		3 Months Ended
	Jan. 01, 2018 USD ($)	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Revenue		$ 695.8	$ 708.4
Number of business segments | segment		2
Operating income (loss)		$ 42.9	101.8
Other Technology | Segment Reconciling Items
Segment Reporting Information [Line Items]
Operating income (loss)		0.2	0.0
Technology
Segment Reporting Information [Line Items]
Revenue		83.7	139.9
Operating income (loss)		$ 29.4	82.0
Technology | Software License Extensions and Renewals
Segment Reporting Information [Line Items]
Revenue	$ 53.0		$ 53.0