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Loans and Card Member Receivables (Details 6) account in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) account | Dec. 31, 2020 USD ($) account | Dec. 31, 2019 USD ($) account
Financing Receivable, Modifications [Line Items] |  |  |
Number of Accounts | account | 32 | 23 | 16
Aggregated Outstanding Balances Upon Default | $ | $ 239 | $ 188 | $ 106
Card Member loans |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Accounts | account | 24 | 17 | 12
Aggregated Outstanding Balances Upon Default | $ | $ 174 | $ 127 | $ 86
Card Member receivables |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Accounts | account | 5 | 3 | 4
Aggregated Outstanding Balances Upon Default | $ | $ 56 | $ 55 | $ 20
Other |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Accounts | account | 3 | 3 |
Aggregated Outstanding Balances Upon Default | $ | $ 9 | $ 6 |

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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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