v3.23.3
Commitments and contingencies (Details)
$ in Millions
1 Months Ended
Sep. 30, 2023
USD ($)
account
Apr. 30, 2023
USD ($)
Nov. 24, 2021
USD ($)
Apr. 30, 2021
USD ($)
WageWorks, Inc        
Loss Contingencies [Line Items]        
Operating lease not yet commenced undiscounted amount       $ 63.1
Operating lease not yet commenced term of contract       11 years
WageWorks, Inc | Union Mesa        
Loss Contingencies [Line Items]        
Letters of credit outstanding     $ 2.8  
HSA Portfolio        
Loss Contingencies [Line Items]        
Purchase price $ 425.0      
Transfer-related expenses 20.0      
Asset acquisition, transferred, transaction cost $ 7.0      
Asset acquisition, number of customer accounts | account 665,000      
Asset acquisition, customer accounts, value $ 2,800.0      
Percentage of assets deposited with third party 7.00%      
Percentage expected to be paid in cash on hand 50.00%      
Term Loan Facility        
Loss Contingencies [Line Items]        
Fair value of the notes   $ 50.0