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Loans and Accounts Receivable (Details 1) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
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Accounts receivable segment information |  |  |  |
Card Member receivables | $ 54,047 | $ 47,308 |  |
Less: Reserve for losses | 521 | 467 | $ 462 | $ 465
Card Member receivables, net | 53,526 | 46,841 |  |
Other receivables, net | 3,163 | 3,232 |  |
Accounts Receivable and Loans Textuals [Abstract] |  |  |  |
Other receivables, reserves | 31 | 45 |  |
Variable Interest Enterprise [Member] |  |  |  |
Accounts receivable segment information |  |  |  |
Card Member receivables | 8,919 | 8,874 |  |
U S Consumer Services [Member] |  |  |  |
Accounts receivable segment information |  |  |  |
Card Member receivables | 13,143 | 12,302 |  |
International Consumer and Network Services [Member] |  |  |  |
Accounts receivable segment information |  |  |  |
Card Member receivables | 7,803 | 5,966 |  |
Global Commercial Services [Member] |  |  |  |
Accounts receivable segment information |  |  |  |
Card Member receivables | $ 33,101 | $ 29,040 |  |

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- Definition For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: 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(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: 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 Reference 3: 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(9)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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