Revenue From Contracts With Customers - Summary of the Balance Sheet Location and Amounts of Contract Assets and Liabilities from Contracts with Customers (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Contract Assets And Liabilities [Line Items]
Deferred revenue - current	$ 106.1	$ 94.6
Total contract liabilities	170.4	155.7
Accounts Receivable, Net of Allowance for Doubtful Accounts [Member]
Schedule Of Contract Assets And Liabilities [Line Items]
Unbilled accounts receivable	36.2	35.0
Accrued and Other Liabilities [Member]
Schedule Of Contract Assets And Liabilities [Line Items]
Deferred revenue - current	106.1	94.6
Other Noncurrent Liabilities [Member]
Schedule Of Contract Assets And Liabilities [Line Items]
Deferred revenue - noncurrent	$ 64.3	$ 61.1