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 | ||