XML 74 R58.htm IDEA: XBRL DOCUMENT v3.23.1
Legal Matters - Additional Information (Details)
$ in Millions
6 Months Ended 118 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Apr. 27, 2023
merchant
Loss Contingencies [Line Items]      
Deposits into the litigation escrow account | $ $ 350 $ 250  
U.S. Covered Litigation      
Loss Contingencies [Line Items]      
Provision for legal matters | $ 341 $ 145  
Deposits into the litigation escrow account | $ $ 350    
Interchange Multidistrict Litigation      
Loss Contingencies [Line Items]      
Settlement percentage 70.00%    
Europe Merchant Litigation | Subsequent Event      
Loss Contingencies [Line Items]      
Number of plaintiffs     1,100
Number of claims settled     175
Number of claims pending     900
Europe Merchant Litigation | Threatened Litigation | Subsequent Event      
Loss Contingencies [Line Items]      
Number of plaintiffs     30