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Reserves For Losses (Details Textuals) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Card Member receivables net write-offs | $ (435) | $ (373)
Allowance for Card Member Receivables, Recoveries of Bad Debts | 174 | 181
Allowance for Card Member Loans, Recoveries of Bad Debts | 217 | 205
Allowance for Card Member Receivables, Recoveries of Bad Debts - TDR | 2 | (7)
Allowance for Card Member Loans, Recoveries of Bad Debts - TDR | (14) | (21)
Other | 2 | 19
Other | (15) | 5
Foreign Currency Translation Adjustments [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other | (5) | 10
Other | (1) | 14
Other Items [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other | 7 | 9
Other | $ (14) | $ (9)

X
- Definition Amount of recovery of Card Member loans related to troubled debt restructurings, which had previously been fully or partially written-off as bad debts. + References No definition available. + Details
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X
- Definition Amount of recovery of Card Member receivables related to troubled debt restructurings, which had previously been fully or partially written-off as bad debts. + References No definition available. + Details
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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 310 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68075217&loc=SL9156395-115594 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 3: http://www.xbrl.org/2003/role/presentationRef -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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X
- 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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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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