Contingencies (Details) individual in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) claim data_file individual
Loss Contingencies [Line Items]
Outstanding letters of credit		$ 7.4
Outstanding surety bonds		$ 50.8
Vertafore Litigation
Loss Contingencies [Line Items]
Number of class actions | claim		3
Number of individuals represented | individual		27.7
Number of data files stored in unsecured external storage device | data_file		3
Vertafore Litigation | Other Nonoperating Income (Expense)
Loss Contingencies [Line Items]
Litigation settlement, expense	$ 45.0
Allen, et al. v. Vertafore, Inc.
Loss Contingencies [Line Items]
Number of class actions | claim		2
Mulvey, et al. v. Vertafore, Inc.
Loss Contingencies [Line Items]
Number of class actions | claim		1
PowerPlan, Inc | Pending Litigation
Loss Contingencies [Line Items]
Damages sought by plaintiff		$ 66.0