Loans and Accounts Receivable (Details 7) pure in Thousands, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
Troubled Debt Restructurings That Subsequently Defaulted [Domain]
Financing Receivable, Modifications [Line Items]
Number of Accounts	3	2	6	4
Aggregated Outstanding Balance Upon Payment Default	$ 12	$ 10	$ 24	$ 20
Card Member Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	2	1	4	2
Aggregated Outstanding Balance Upon Payment Default	$ 10	$ 9	$ 21	$ 18
Card Member Receivables [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts	1	1	2	2
Aggregated Outstanding Balance Upon Payment Default	$ 2	$ 1	$ 3	$ 2

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.

No definition available.

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953682-111524

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

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