Customer Funds - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Investments Debt And Equity Securities [Line Items]
Investment income from invested customer funds included in recurring revenue	$ 47.4	$ 48.9	$ 102.7	$ 109.6
Maximum [Member] \| Maturities ranging from one to 120 days [Member]
Investments Debt And Equity Securities [Line Items]
Average customer trust funds held in liquidity portfolios, Percentage			55.00%
Maximum [Member] \| Maturities ranging from 120 days to 10 years [Member]
Investments Debt And Equity Securities [Line Items]
Average customer trust funds held in fixed income portfolios, Percentage			55.00%
Minimum [Member] \| Maturities ranging from one to 120 days [Member]
Investments Debt And Equity Securities [Line Items]
Average customer trust funds held in liquidity portfolios, Percentage			45.00%
Minimum [Member] \| Maturities ranging from 120 days to 10 years [Member]
Investments Debt And Equity Securities [Line Items]
Average customer trust funds held in fixed income portfolios, Percentage			45.00%