Segment and Geographic Information - Summary of Long-lived Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	$ 322.9	$ 353.9	$ 392.4
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	236.4	256.9	285.7
Europe, Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	63.9	73.5	80.7
Asia-Pacific and Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	15.0	18.4	20.6
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	7.5	5.0	5.1
Americas, Excluding United States and Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	$ 0.1	$ 0.1	$ 0.3