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Significant Credit Concentrations (Tables) | 12 Months Ended
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Dec. 31, 2017
Table Text Block [Abstract] |
Maximum credit exposure by category | The following table details the Company’s maximum credit exposure of the on-balance sheet assets by category as of December 31:
(Billions) |  | 2017 |  | 2016
On-balance sheet: |  |  |  |  |  |
Individuals(a) |  | $ | 112 |  | $ | 98
Institutions(b) |  |  | 20 |  |  | 18
Financial Services(c) |  |  | 35 |  |  | 28
U.S. Government and agencies(d) |  |  | 3 |  |  | 3
Total on-balance sheet |  |  | 170 |  |  | 147
P rimarily reflects loans and receivables from global consumer and small business Card Members, which are governed by individual credit risk management. Primarily reflects loans and receivables from global corporate Card Members, which are governed by institutional credit risk management. Represents banks, broker-dealers, insurance companies and savings and loan associations. R epresent debt obligations of the U.S. Government and its agencies, states and municipalities and governm ent-sponsored entities.
Card Member loans and receivables exposure | The following table details the Company’s Card Member loans and receivables exposure (including unused lines-of-credit available to Card Members as part of established lending product agreements) in the United States and out side the United States as of December 31:
(Billions) |  | 2017 |  | 2016
On-balance sheet: |  |  |  |  |  |
U.S. |  | $ | 102 |  | $ | 93
Non-U.S. |  |  | 25 |  |  | 20
On-balance sheet |  |  | 127 |  |  | 113
Unused lines-of-credit:(a) |  |  |  |  |  |
U.S. |  |  | 224 |  |  | 203
Non-U.S. |  |  | 49 |  |  | 39
Total unused lines-of-credit |  | $ | 273 |  | $ | 242
Total unused credit available to Card Members does not represent potential future cash requirements, as a significant portion of this unused credit will likely not be drawn. Because the Company’s charge card products generally have no preset spending limit, the associated credit limit on charge products is not quantifiable, and therefore is not reflected in unused credit available to Card Members.

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- Definition Represents table detailing the Company's Card Member loans and receivables exposure (including unused lines-of-credit on cardmember loans) in the United States and outside the United States. + References No definition available. + Details
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- Definition Represents table detailing the Company's maximum credit exposure by category, including the credit exposure associated with derivative financial instruments. + References No definition available. + Details
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