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Reportable Operating Segments and Geographic Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |
Non-interest revenues | $ 8,183 | $ 7,613 | $ 24,233 | $ 22,459 |
Revenue from contracts with customers | 6,654 | 6,172 | 19,716 | 18,244 |
Interest income | 2,738 | 2,245 | 7,740 | 6,244 |
Interest expense | 777 | 568 | 2,109 | 1,532 |
Total revenues, net of interest expense | 10,144 | 9,290 | 29,864 | 27,171 |
Net income | 1,654 | 1,359 | 4,911 | 3,954 |
Total assets | 189,092 | 169,000 | 189,092 | 169,000 | $ 181,196
Global Consumer Services Group [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Non-interest revenues | 3,680 | 3,361 | 10,849 | 9,843 |
Revenue from contracts with customers | 2,577 | 2,359 | 7,611 | 6,922 |
Interest income | 2,140 | 1,781 | 6,083 | 4,941 |
Interest expense | 404 | 281 | 1,101 | 741 |
Total revenues, net of interest expense | 5,416 | 4,861 | 15,831 | 14,043 |
Net income | 779 | 680 | 2,375 | 1,968 |
Total assets | 130,900 | 117,800 | 130,900 | 117,800 |
Global Commercial Services [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Non-interest revenues | 2,980 | 2,734 | 8,795 | 8,076 |
Revenue from contracts with customers | 2,593 | 2,365 | 7,628 | 6,980 |
Interest income | 416 | 351 | 1,186 | 1,004 |
Interest expense | 218 | 159 | 593 | 427 |
Total revenues, net of interest expense | 3,178 | 2,926 | 9,388 | 8,653 |
Net income | 606 | 505 | 1,716 | 1,387 |
Total assets | 54,000 | 49,300 | 54,000 | 49,300 |
Global Merchant and Network Services [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Non-interest revenues | 1,494 | 1,491 | 4,539 | 4,471 |
Revenue from contracts with customers | 1,479 | 1,446 | 4,465 | 4,333 |
Interest income | 6 | 8 | 22 | 32 |
Interest expense | (78) | (48) | (205) | (133) |
Total revenues, net of interest expense | 1,578 | 1,547 | 4,766 | 4,636 |
Net income | 580 | 420 | 1,639 | 1,329 |
Total assets | 31,900 | 27,900 | 31,900 | 27,900 |
Corporate and Other [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Non-interest revenues | 29 | 27 | 50 | 69 |
Revenue from contracts with customers | 5 | 2 | 12 | 9 |
Interest income | 176 | 105 | 449 | 267 |
Interest expense | 233 | 176 | 620 | 497 |
Total revenues, net of interest expense | (28) | (44) | (121) | (161) |
Net income | (311) | (246) | (819) | (730) |
Total assets | $ (27,800) | $ (26,000) | $ (27,800) | $ (26,000) |

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