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Earnings Per Common Share (Tables) | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Schedule of Basic and Diluted Earnings Per Common Share | Our basic and diluted earnings per Common Share are calculated as follows:
Year ended December 31, |  |  |
Dollars in millions, except per share amounts | 2023 | 2022 | 2021
EARNINGS |  |  |
Income (loss) from continuing operations | $ | 964 |  | $ | 1,911 |  | $ | 2,612 |
Less: Net income (loss) attributable to noncontrolling interests | — |  | — |  | — |
Income (loss) from continuing operations attributable to Key | 964 |  | 1,911 |  | 2,612 |
Less: Dividends on preferred stock | 143 |  | 118 |  | 106 |
Income (loss) from continuing operations attributable to Key common shareholders | 821 |  | 1,793 |  | 2,506 |
Income (loss) from discontinued operations, net of taxes | 3 |  | 6 |  | 13 |
Net income (loss) attributable to Key common shareholders | $ | 824 |  | $ | 1,799 |  | $ | 2,519 |
WEIGHTED-AVERAGE COMMON SHARES |  |  |
Weighted-average Common Shares outstanding (000) | 927,217 |  | 924,363 |  | 947,065 |
Effect of common share options and other stock awards | 5,542 |  | 8,696 |  | 10,349 |
Weighted-average common shares and potential Common Shares outstanding (000) (a) | 932,759 |  | 933,059 |  | 957,414 |
EARNINGS PER COMMON SHARE |  |  |
Income (loss) from continuing operations attributable to Key common shareholders | $ | .88 |  | $ | 1.94 |  | $ | 2.64 |
Income (loss) from discontinued operations, net of taxes | — |  | .01 |  | .01 |
Net income (loss) attributable to Key common shareholders (b) | .89 |  | 1.94 |  | 2.65 |
Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution | .88 |  | 1.92 |  | 2.62 |
Income (loss) from discontinued operations, net of taxes — assuming dilution | — |  | .01 |  | .01 |
Net income (loss) attributable to Key common shareholders — assuming dilution (b) | .88 |  | 1.93 |  | 2.63 |
(a)Assumes conversion of Common Share options and other stock awards and/or convertible preferred stock, as applicable. (b)EPS may not foot due to rounding.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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