| | | | | | | | | | | | | | | | | |
| dollars in millions, except per share amounts | 2018 | | | 2017 | | | 2016 | | | 2015 | | | 2014 | | | Compound Annual Rate of Change (2014-2018) | |
| YEAR ENDED DECEMBER 31, | | | | | | | | | | | | | | | | | |
| Interest income | $ | 4,878 | | $ | 4,390 | | $ | 3,319 | | $ | 2,622 | | $ | 2,554 | | 13.8 | % |
| Interest expense | 969 | | | 613 | | | 400 | | | 274 | | | 261 | | | 30.0 | |
| Net interest income | 3,909 | | | 3,777 | | | 2,919 | | | 2,348 | | | 2,293 | | | 11.3 | |
| Provision for credit losses | 246 | | | 229 | | | 266 | | | 166 | | | 57 | | | 34.0 | |
| Noninterest income | 2,515 | | | 2,478 | | | 2,071 | | | 1,880 | | | 1,797 | | | 7.0 | |
| Noninterest expense | 3,975 | | | 4,098 | | | 3,756 | | | 2,840 | | | 2,761 | | | 7.6 | |
| Income (loss) from continuing operations before income taxes | 2,203 | | | 1,928 | | | 968 | | | 1,222 | | | 1,272 | | | 11.6 | |
| Income (loss) from continuing operations attributable to Key | 1,859 | | | 1,289 | | | 790 | | | 915 | | | 939 | | | 14.6 | |
| Income (loss) from discontinued operations, net of taxes | 7 | | | 7 | | | 1 | | | 1 | | | (39 | | ) | N/A | |
| Net income (loss) attributable to Key | 1,866 | | | 1,296 | | | 791 | | | 916 | | | 900 | | | 15.7 | |
| Income (loss) from continuing operations attributable to Key common shareholders | 1,793 | | | 1,219 | | | 753 | | | 892 | | | 917 | | | 14.4 | |
| Income (loss) from discontinued operations, net of taxes | 7 | | | 7 | | | 1 | | | 1 | | | (39 | | ) | N/A | |
| Net income (loss) attributable to Key common shareholders | 1,800 | | | 1,226 | | | 754 | | | 893 | | | 878 | | | 15.4 | |
| PER COMMON SHARE | | | | | | | | | | | | | | | | | |
| Income (loss) from continuing operations attributable to Key common shareholders | $ | 1.72 | | $ | 1.13 | | $ | .81 | | $ | 1.06 | | $ | 1.05 | | 10.4 | |
| Income (loss) from discontinued operations, net of taxes | .01 | | | .01 | | | — | | | — | | | (.04 | | ) | N/A | |
| Net income (loss) attributable to Key common shareholders (a) | 1.73 | | | 1.14 | | | .81 | | | 1.06 | | | 1.01 | | | 11.4 | |
| Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution | 1.70 | | | 1.12 | | | .80 | | | 1.05 | | | 1.04 | | | 10.3 | |
| Income (loss) from discontinued operations, net of taxes — assuming dilution | .01 | | | .01 | | | — | | | — | | | (.04 | | ) | N/A | |
| Net income (loss) attributable to Key common shareholders — assuming dilution (a) | 1.71 | | | 1.13 | | | .80 | | | 1.05 | | | .99 | | | 11.6 | |
| Cash dividends paid | .565 | | | .38 | | | .33 | | | .29 | | | .25 | | | 17.7 | |
| Book value at year end | 13.90 | | | 13.09 | | | 12.58 | | | 12.51 | | | 11.91 | | | 3.1 | |
| Tangible book value at year end | 11.14 | | | 10.35 | | | 9.99 | | | 11.22 | | | 10.65 | | | .9 | |
| Market price at year end | 14.78 | | | 20.17 | | | 18.27 | | | 13.19 | | | 13.90 | | | 1.2 | |
| Dividend payout ratio | 32.7 | | % | 33.3 | | % | 40.7 | | % | 27.4 | | % | 24.8 | | % | N/A | |
| Weighted-average common shares outstanding (000) | 1,040,890 | | | 1,072,078 | | | 927,816 | | | 834,846 | | | 871,464 | | | 3.6 | |
| Weighted-average common shares and potential common shares outstanding (000) (b) | 1,054,682 | | | 1,088,593 | | | 938,536 | | | 844,489 | | | 878,199 | | | 3.7 | |
| AT DECEMBER 31, | | | | | | | | | | | | | | | | | |
| Loans | $ | 89,552 | | $ | 86,405 | | $ | 86,038 | | $ | 59,876 | | $ | 57,381 | | 9.3 | % |
| Earning assets | 125,803 | | | 123,490 | | | 121,966 | | | 83,780 | | | 82,269 | | | 8.9 | |
| Total assets | 139,613 | | | 137,698 | | | 136,453 | | | 95,131 | | | 93,820 | | | 8.3 | |
| Deposits | 107,309 | | | 105,235 | | | 104,087 | | | 71,046 | | | 71,998 | | | 8.3 | |
| Long-term debt | 13,732 | | | 14,333 | | | 12,384 | | | 10,184 | | | 7,874 | | | 11.8 | |
| Key common shareholders’ equity | 14,145 | | | 13,998 | | | 13,575 | | | 10,456 | | | 10,239 | | | 6.7 | |
| Key shareholders’ equity | 15,595 | | | 15,023 | | | 15,240 | | | 10,746 | | | 10,530 | | | 8.2 | |
| PERFORMANCE RATIOS — FROM CONTINUING OPERATIONS | | | | | | | | | | | | | | | | | |
| Return on average total assets | 1.36 | | % | .96 | | % | .70 | | % | .99 | | % | 1.08 | | % | N/A | |
| Return on average common equity | 12.88 | | | 8.65 | | | 6.26 | | | 8.63 | | | 9.01 | | | N/A | |
| Return on average tangible common equity (c) | 16.22 | | | 10.84 | | | 7.39 | | | 9.64 | | | 10.04 | | | N/A | |
| Net interest margin (TE) | 3.17 | | | 3.17 | | | 2.92 | | | 2.88 | | | 2.97 | | | N/A | |
| Cash efficiency ratio (c) | 60.0 | | | 63.5 | | | 73.7 | | | 65.9 | | | 66.2 | | | N/A | |
| PERFORMANCE RATIOS — FROM CONSOLIDATED OPERATIONS | | | | | | | | | | | | | | | | | |
| Return on average total assets | 1.35 | | % | .96 | | % | .69 | | % | .97 | | % | .99 | | % | N/A | |
| Return on average common equity | 12.93 | | | 8.70 | | | 6.27 | | | 8.64 | | | 8.63 | | | N/A | |
| Return on average tangible common equity (c) | 16.28 | | | 10.90 | | | 7.40 | | | 9.65 | | | 9.61 | | | N/A | |
| Net interest margin (TE) | 3.15 | | | 3.15 | | | 2.91 | | | 2.85 | | | 2.94 | | | N/A | |
| Loan to deposit (d) | 85.6 | | | 84.4 | | | 85.2 | | | 87.8 | | | 84.6 | | | N/A | |
| CAPITAL RATIOS AT DECEMBER 31, | | | | | | | | | | | | | | | | | |
| Key shareholders’ equity to assets | 11.17 | | % | 10.91 | | % | 11.17 | | % | 11.30 | | % | 11.22 | | % | N/A | |
| Key common shareholders’ equity to assets | 10.15 | | | 10.17 | | | 9.95 | | | 10.99 | | | 10.91 | | | N/A | |
| Tangible common equity to tangible assets (c) | 8.30 | | | 8.23 | | | 8.09 | | | 9.98 | | | 9.88 | | | N/A | |
| Common Equity Tier 1 | 9.93 | | | 10.16 | | | 9.54 | | | 10.94 | | | N/A | | | N/A | |
| Tier 1 common equity | N/A | | | N/A | | | N/A | | | N/A | | | 11.17 | | | N/A | |
| Tier 1 risk-based capital | 11.08 | | | 11.01 | | | 10.89 | | | 11.35 | | | 11.90 | | | N/A | |
| Total risk-based capital | 12.89 | | | 12.92 | | | 12.85 | | | 12.97 | | | 13.89 | | | N/A | |
| Leverage | 9.89 | | | 9.73 | | | 9.90 | | | 10.72 | | | 11.26 | | | N/A | |
| TRUST ASSETS | | | | | | | | | | | | | | | | | |
| Assets under management | $ | 36,775 | | $ | 39,588 | | $ | 36,592 | | $ | 33,983 | | $ | 39,157 | | (1.2 | )% |
| OTHER DATA | | | | | | | | | | | | | | | | | |
| Average full-time-equivalent employees | 18,180 | | | 18,415 | | | 15,700 | | | 13,483 | | | 13,853 | | | 5.6 | % |
| Branches | 1,159 | | | 1,197 | | | 1,217 | | | 966 | | | 994 | | | 3.1 | |