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Commitments and Contingent Liabilities (Details) - USD ($) $ in Millions |  |  | 3 Months Ended
--- | --- | --- | ---
Oct. 11, 2024 | Apr. 08, 2024 | Sep. 30, 2024
Bank Participation in Fraudulent Sale of Securities by Principals [Member] | Pending Litigation [Member] |  |  |
Loss Contingency [Abstract] |  |  |
Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds |  |  | $ 33
Loss Contingency, Damages Sought, Value |  |  | 3
Gain (Loss) from Litigation Settlement [Abstract] |  |  |
Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds |  |  | 33
Loss Contingency, Damages Sought, Value |  |  | $ 3
Subsequent Event [Member] |  |  |
Loss Contingency [Abstract] |  |  |
Escrow Deposit by Visa for Potential Commitments | $ 1,500 |  |
Loss Contingencies [Line Items] |  |  |
Escrow Deposit by Visa for Potential Commitments | $ 1,500 |  |
Visa Membership |  |  |
Loss Contingency [Abstract] |  |  |
Potential Exchange Offer Program Conversion Percentage |  | 5000.00% |
Common Stock Class B Shares Owned |  |  | 252,233
Common Stock Owned |  |  | 50,053
Common Stock Class B-2 Shares Owned |  |  | 126,116
Common Stock Sold |  |  | 41,148
Common Stock Donated |  |  | 8,905
Loss Contingencies [Line Items] |  |  |
Potential Exchange Offer Program Conversion Percentage |  | 5000.00% |
Common Stock Class B Shares Owned |  |  | 252,233
Common Stock Owned |  |  | 50,053
Common Stock Class B-2 Shares Owned |  |  | 126,116
Common Stock Sold |  |  | 41,148
Common Stock Donated |  |  | 8,905

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