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Loans - FDM Disclosure - Modification to Borrowers (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Jun. 30, 2023
--- | --- | ---
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | $ 3,116 | $ 1,534
Commitments to lend on loans modified in TDRs | 193 | 48
Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 2,556 | 1,138
30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 203 | 97
60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 124 | 72
Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 233 | 227
Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 560 | 396
Credit Card: |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 763 | 346
Credit Card: | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 499 | 184
Credit Card: | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 72 | 48
Credit Card: | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 56 | 33
Credit Card: | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 136 | 81
Credit Card: | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 264 | 162
Credit Card: | Domestic Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 646 | 285
Credit Card: | Domestic Card | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 438 | 160
Credit Card: | Domestic Card | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 61 | 42
Credit Card: | Domestic Card | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 45 | 27
Credit Card: | Domestic Card | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 102 | 56
Credit Card: | Domestic Card | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 208 | 125
Credit Card: | International card businesses |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 117 | 61
Credit Card: | International card businesses | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 61 | 24
Credit Card: | International card businesses | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 11 | 6
Credit Card: | International card businesses | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 11 | 6
Credit Card: | International card businesses | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 34 | 25
Credit Card: | International card businesses | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 56 | 37
Consumer Banking: |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 770 | 424
Consumer Banking: | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 572 | 340
Consumer Banking: | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 105 | 49
Consumer Banking: | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 68 | 26
Consumer Banking: | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 25 | 9
Consumer Banking: | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 198 | 84
Consumer Banking: | Auto |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 761 | 421
Consumer Banking: | Auto | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 564 | 337
Consumer Banking: | Auto | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 105 | 49
Consumer Banking: | Auto | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 68 | 26
Consumer Banking: | Auto | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 24 | 9
Consumer Banking: | Auto | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 197 | 84
Consumer Banking: | Retail banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 9 | 3
Consumer Banking: | Retail banking | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 8 | 3
Consumer Banking: | Retail banking | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 0
Consumer Banking: | Retail banking | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 0
Consumer Banking: | Retail banking | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1 | 0
Consumer Banking: | Retail banking | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1 | 0
Commercial Banking: |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1,583 | 764
Commercial Banking: | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1,485 | 614
Commercial Banking: | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 26 | 0
Commercial Banking: | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 13
Commercial Banking: | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 72 | 137
Commercial Banking: | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 98 | 150
Commercial Banking: | Commercial and multifamily real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 641 | 364
Commercial Banking: | Commercial and multifamily real estate | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 622 | 339
Commercial Banking: | Commercial and multifamily real estate | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 19 | 0
Commercial Banking: | Commercial and multifamily real estate | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 0
Commercial Banking: | Commercial and multifamily real estate | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 25
Commercial Banking: | Commercial and multifamily real estate | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 19 | 25
Commercial Banking: | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 942 | 400
Commercial Banking: | Commercial and industrial | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 863 | 275
Commercial Banking: | Commercial and industrial | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 7 | 0
Commercial Banking: | Commercial and industrial | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 13
Commercial Banking: | Commercial and industrial | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 72 | 112
Commercial Banking: | Commercial and industrial | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | $ 79 | $ 125

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