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Revenue from Contracts with Customers (Tables) | 12 Months Ended
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Dec. 31, 2025
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue | The following table represents a disaggregation of revenue from contracts with customers, by business segment. The development and application of the methodologies that we use to allocate items among our business segments is a dynamic process. Accordingly, financial results may be revised periodically to reflect enhanced alignment of expense base allocations drivers, changes in the risk profile of a particular business, or changes in our organizational structure. Additional details of our revenue recognition policies and components of our noninterest income line items is provided within Note 1 (“Summary of Significant Accounting Policies”) under the heading “Revenue Recognition.”
Year ended December 31, | 2025
Dollars in millions | Consumer Bank | Commercial Bank | Total Contract Revenue
NONINTEREST INCOME |  |  |
Trust and investment services income | $ | 483 |  | $ | 75 |  | $ | 558 |
Investment banking and debt placement fees | — |  | 551 |  | 551 |
Services charges on deposit accounts | 144 |  | 151 |  | 295 |
Cards and payments income | 175 |  | 162 |  | 337 |
Other noninterest income | 8 |  | — |  | 8 |
Total revenue from contracts with customers | $ | 810 |  | $ | 939 |  | $ | 1,749 |
Other noninterest income (a) |  |  | $ | 953 |
Noninterest income from other segments (b) |  |  | 140 |
Total noninterest income |  |  | $ | 2,842 |
Year ended December 31, | 2024
Dollars in millions | Consumer Bank | Commercial Bank | Total Contract Revenue
NONINTEREST INCOME |  |  |
Trust and investment services income | $ | 449 |  | $ | 69 |  | $ | 518 |
Investment banking and debt placement fees | — |  | 521 |  | 521 |
Services charges on deposit accounts | 135 |  | 126 |  | 261 |
Cards and payments income | 178 |  | 153 |  | 331 |
Other noninterest income | 12 |  | — |  | 12 |
Total revenue from contracts with customers | $ | 774 |  | $ | 869 |  | $ | 1,643 |
Other noninterest income (a) |  |  | $ | 910 |
Noninterest income from other segments (b) |  |  | (1,744) |
Total noninterest income |  |  | $ | 809 |
Year ended December 31, | 2023
Dollars in millions | Consumer Bank | Commercial Bank | Total Contract Revenue
NONINTEREST INCOME |  |  |
Trust and investment services income | $ | 410 |  | $ | 68 |  | $ | 478 |
Investment banking and debt placement fees | — |  | 344 |  | 344 |
Services charges on deposit accounts | 158 |  | 111 |  | 269 |
Cards and payments income | 187 |  | 145 |  | 332 |
Other noninterest income | 12 |  | — |  | 12 |
Total revenue from contracts with customers | $ | 767 |  | $ | 668 |  | $ | 1,435 |
Other noninterest income (a) |  |  | $ | 931 |
Noninterest income from other segments (b) |  |  | 104 |
Total noninterest income |  |  | $ | 2,470 |
(a)Noninterest income considered earned outside the scope of contracts with customers. (b)Other includes other segments that consists of corporate treasury, our principal investing unit, and various exit portfolios as well as reconciling items which primarily represents the unallocated portion of nonearning assets of corporate support functions. Charges related to the funding of these assets are part of net interest income and are allocated to the business segments through noninterest expense. Corporate treasury includes realized gains and loss from transaction associated with Key’s investment securities portfolio. Reconciling items also includes intercompany eliminations and certain items that are not allocated to the business segments because they do not reflect their normal operations. Refer to Note 23 (“Business Segment Reporting”) for more information.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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