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Loans and Accounts Receivable (Details 6) pure in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($) M bp | Dec. 31, 2015 USD ($) M bp | Dec. 31, 2014 USD ($) M bp
Accounts Receivable and Loans Textuals [Abstract] |  |  |
Difference between pre- and post-modification outstanding balances | $ 0 | $ 0 | $ 0
U S Consumer Services [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Accounts (in thousands) | 40 | 52 | 61
Aggregated Outstanding Balance | $ 343 | $ 432 | $ 518
Card Member Loans [Member] | U S Consumer Services [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Accounts (in thousands) | 31 | 40 | 46
Aggregated Outstanding Balance | $ 220 | $ 285 | $ 342
Average basis point reduction in interest rate by class of Card Member loans | bp | 9 | 9 | 10
Card Member Receivables [Member] | U S Consumer Services [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Accounts (in thousands) | 9 | 12 | 15
Aggregated Outstanding Balance | $ 123 | $ 147 | $ 176
Average payment term extension | M | 18 | 12 | 12

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953676-111524 + Details
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