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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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