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Loans and Card Member Receivables (Details 4) account in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) account | Sep. 30, 2020 USD ($) account | Sep. 30, 2021 USD ($) account | Sep. 30, 2020 USD ($) account
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Accounts | account | 32 | 92 | 106 | 262
Account Balances | $ | $ 293 | $ 1,045 | $ 962 | $ 3,315
Card Member Loans |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Accounts | account | 26 | 76 | 87 | 216
Account Balances | $ | $ 177 | $ 649 | $ 636 | $ 1,947
Average Interest Rate Reduction (as a percentage) | 13.00% | 14.00% | 13.00% | 14.00%
Card Member Receivables |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Accounts | account | 5 | 13 | 16 | 38
Account Balances | $ | $ 114 | $ 231 | $ 314 | $ 1,049
Average Payment Term Extension (in months) | 17 months | 18 months | 18 months | 19 months
Other Loans |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Accounts | account | 1 | 3 | 3 | 8
Account Balances | $ | $ 2 | $ 165 | $ 12 | $ 319
Average Interest Rate Reduction (as a percentage) | 3.00% | 3.00% | 3.00% | 3.00%
Average Payment Term Extension (in months) | 17 months | 17 months | 16 months | 16 months

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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