v3.24.2
Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2024
USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance $ 2,398.2
Ending balance 2,475.8
Foreign Currency Translation Adjustment [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance (217.4)
Other comprehensive (loss) income before income taxes and reclassifications (27.5)
Other comprehensive (loss) income (27.5)
Ending balance (244.9)
Unrealized Gain (Loss) from Invested Customer Funds [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance (56.3)
Other comprehensive (loss) income before income taxes and reclassifications (0.3)
Other comprehensive (loss) income (0.3)
Ending balance (56.6)
Pension Liability Adjustment [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance (163.0)
Other comprehensive (loss) income before income taxes and reclassifications 0.5
Income tax expense (1.5)
Reclassifications to earnings 5.5
Other comprehensive (loss) income 4.5
Ending balance (158.5)
Accumulated Other Comprehensive Income (Loss) [Member]  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning balance (436.7)
Other comprehensive (loss) income before income taxes and reclassifications (27.3)
Income tax expense (1.5)
Reclassifications to earnings 5.5
Other comprehensive (loss) income (23.3)
Ending balance $ (460.0)