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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