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Accounts Receivable and Loans (Details 5) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable Impaired [Line Items]
Average balance of impaired loans	$ 773	$ 827	$ 780	$ 871
Interest income recognized	17	13	34	33
U S Card Services [Member] | Card Member Loans [Member]
Financing Receivable Impaired [Line Items]
Average balance of impaired loans	691	715	684	760
Interest income recognized	14	9	27	25
U S Card Services [Member] | Card Member Receivables [Member]
Financing Receivable Impaired [Line Items]
Average balance of impaired loans	27	47	38	47
Interest income recognized	0	0	0	0
International Card Services [Member] | Card Member Loans [Member]
Financing Receivable Impaired [Line Items]
Average balance of impaired loans	55	65	58	64
Interest income recognized	$ 3	$ 4	$ 7	$ 8

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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

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



-Section 50



-Paragraph 15



-Subparagraph (c)(1)



-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



-Section 50



-Paragraph 17



-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



-Section 50



-Paragraph 15



-Subparagraph (c)(2)



-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

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