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Loans and Accounts Receivable (Details 5) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Financing Receivable, Impaired [Line Items] |  |  |  |
Average balance of impaired loans | $ 1,453 | $ 1,098 | $ 1,411 | $ 1,056
Interest income recognized | 39 | 32 | 76 | 63
Global Consumer Services Group [Member] | Card Member Loans [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average balance of impaired loans | 1,102 | 846 | 1,076 | 819
Interest income recognized | 33 | 26 | 64 | 52
Global Consumer Services Group [Member] | Card Member Receivables [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average balance of impaired loans | 51 | 31 | 48 | 29
Interest income recognized | 0 | 0 | 0 | 0
Global Commercial Services [Member] | Card Member Loans [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average balance of impaired loans | 195 | 149 | 188 | 141
Interest income recognized | 6 | 6 | 12 | 11
Global Commercial Services [Member] | Card Member Receivables [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Average balance of impaired loans | 105 | 72 | 99 | 67
Interest income recognized | $ 0 | $ 0 | $ 0 | $ 0

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