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Reserves For Losses (Details Textuals) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Card Member receivables net write-offs | $ (216) | $ (199)
Allowance for Card Member Receivables, Recoveries of Bad Debts | 91 | 90
Allowance for Card Member Loans, Recoveries of Bad Debts | 124 | 106
Other | 11 | 10
Other | (2) | 1
Foreign Currency Translation Adjustments [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other | 6 | 6
Other | 3 | 10
Other Items [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other | 5 | 4
Other | (5) | (9)
Troubled Debt Restructuring [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Allowance for Card Member Receivables, Recoveries of Bad Debts | (4) | 2
Allowance for Card Member Loans, Recoveries of Bad Debts | $ (15) | $ (7)

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- Definition Allowance For Doubtful Accounts Receivable Adjustments + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of recoveries of receivables doubtful of collection that were previously charged off. + References No definition available. + Details
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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of other addition (reduction) in allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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