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Loans and Card Member Receivables - Modified as TDR, Prior to Adoption (Details) account in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) account | Dec. 31, 2021 USD ($) account
Financing Receivable, Modifications [Line Items] |  |
Number of Accounts | account | 180 | 137
Account Balances | $ | $ 1,910 | $ 1,239
Card Member loans |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Accounts | account | 149 | 112
Account Balances | $ | $ 1,002 | $ 789
Average Interest Rate Reduction (as a percent) | 14.00% | 13.00%
Card Member receivables |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Accounts | account | 27 | 21
Account Balances | $ | $ 900 | $ 437
Average Payment Term Extension (in months) | 20 months | 18 months
Other loans |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Accounts | account | 4 | 4
Account Balances | $ | $ 8 | $ 13
Average Interest Rate Reduction (as a percent) | 2.00% | 3.00%
Average Payment Term Extension (in months) | 17 months | 16 months

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