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Business Events (Details Textuals) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Business Events (Details) [Abstract] |  |  |  |  |
CardMember loans transferred from HFS to held for investment | $ 245 |  |  |  |
CardMember receivables transferred from Held for Sales (HFS) to held for investment | 1 |  |  |  |
Business Events (Line Items) |  |  |  |  |
Gain on sale of held for sale (HFS) portfolio | 1,091 |  | $ 0 | $ 1,218 | $ 0
Other Expense [Member] |  |  |  |  |
Business Events (Line Items) |  |  |  |  |
Gain on sale of held for sale (HFS) portfolio | $ 1,091 | $ 127 |  |  |

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- Definition Business Events for the period + References No definition available. + Details
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- Definition CardMember loans transferred from Held for Sales (HFS) to held for investment + References No definition available. + Details
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- Definition The cash inflow resulting from the sale of loans classified as held-for-sale, including proceeds from loans sold through mortgage securitization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3337-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3461-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 230 -Section 55 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=34726456&loc=d3e60097-112785 + Details
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