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Reportable Operating Segment (Tables) | 9 Months Ended
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Sep. 30, 2018
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] |
Operating segment information | The following t able presents certain selected financial information for our reportable operating segments and Corporate & Other:
Three Months Ended September 30, 2018(Millions, except where indicated) |  | GCSG |  | GCS |  | GMNS |  | Corporate & Other(a) |  | Consolidated
Total non-interest revenues |  | $ | 3,680 |  | $ | 2,980 |  | $ | 1,494 |  | $ | 29 |  | $ | 8,183
Revenue from contracts with customers(b) |  |  | 2,577 |  |  | 2,593 |  |  | 1,479 |  |  | 5 |  |  | 6,654
Interest income |  |  | 2,140 |  |  | 416 |  |  | 6 |  |  | 176 |  |  | 2,738
Interest expense |  |  | 404 |  |  | 218 |  |  | (78) |  |  | 233 |  |  | 777
Total revenues net of interest expense |  |  | 5,416 |  |  | 3,178 |  |  | 1,578 |  |  | (28) |  |  | 10,144
Net income (loss) |  | $ | 779 |  | $ | 606 |  | $ | 580 |  | $ | (311) |  | $ | 1,654
Total assets (billions) |  | $ | 131 |  | $ | 54 |  | $ | 32 |  | $ | (28) |  | $ | 189
Nine Months Ended September 30, 2018(Millions, except where indicated) |  | GCSG |  | GCS |  | GMNS |  | Corporate & Other(a) |  | Consolidated
Total non-interest revenues |  | $ | 10,849 |  | $ | 8,795 |  | $ | 4,539 |  | $ | 50 |  | $ | 24,233
Revenue from contracts with customers(b) |  |  | 7,611 |  |  | 7,628 |  |  | 4,465 |  |  | 12 |  |  | 19,716
Interest income |  |  | 6,083 |  |  | 1,186 |  |  | 22 |  |  | 449 |  |  | 7,740
Interest expense |  |  | 1,101 |  |  | 593 |  |  | (205) |  |  | 620 |  |  | 2,109
Total revenues net of interest expense |  |  | 15,831 |  |  | 9,388 |  |  | 4,766 |  |  | (121) |  |  | 29,864
Net income (loss) |  | $ | 2,375 |  | $ | 1,716 |  | $ | 1,639 |  | $ | (819) |  | $ | 4,911
Total assets (billions) |  | $ | 131 |  | $ | 54 |  | $ | 32 |  | $ | (28) |  | $ | 189
Three Months Ended September 30, 2017(Millions, except where indicated) |  | GCSG |  | GCS |  | GMNS |  | Corporate & Other(a) |  | Consolidated
Total non-interest revenues |  | $ | 3,361 |  | $ | 2,734 |  | $ | 1,491 |  | $ | 27 |  | $ | 7,613
Revenue from contracts with customers(b) |  |  | 2,359 |  |  | 2,365 |  |  | 1,446 |  |  | 2 |  |  | 6,172
Interest income |  |  | 1,781 |  |  | 351 |  |  | 8 |  |  | 105 |  |  | 2,245
Interest expense |  |  | 281 |  |  | 159 |  |  | (48) |  |  | 176 |  |  | 568
Total revenues net of interest expense |  |  | 4,861 |  |  | 2,926 |  |  | 1,547 |  |  | (44) |  |  | 9,290
Net income (loss) |  | $ | 680 |  | $ | 505 |  | $ | 420 |  | $ | (246) |  | $ | 1,359
Total assets (billions) |  | $ | 118 |  | $ | 49 |  | $ | 28 |  | $ | (26) |  | $ | 169
Nine Months Ended September 30, 2017(Millions, except where indicated) |  | GCSG |  | GCS |  | GMNS |  | Corporate & Other(a) |  | Consolidated
Total non-interest revenues |  | $ | 9,843 |  | $ | 8,076 |  | $ | 4,471 |  | $ | 69 |  | $ | 22,459
Revenue from contracts with customers(b) |  |  | 6,922 |  |  | 6,980 |  |  | 4,333 |  |  | 9 |  |  | 18,244
Interest income |  |  | 4,941 |  |  | 1,004 |  |  | 32 |  |  | 267 |  |  | 6,244
Interest expense |  |  | 741 |  |  | 427 |  |  | (133) |  |  | 497 |  |  | 1,532
Total revenues net of interest expense |  |  | 14,043 |  |  | 8,653 |  |  | 4,636 |  |  | (161) |  |  | 27,171
Net income (loss) |  | $ | 1,968 |  | $ | 1,387 |  | $ | 1,329 |  | $ | (730) |  | $ | 3,954
Total assets (billions) |  | $ | 118 |  | $ | 49 |  | $ | 28 |  | $ | (26) |  | $ | 169
Corporate & Other includes adjustments and eliminations for intersegment activity. Includes discount revenue, certain other fees and commissions and other revenues from customers.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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