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Restrictions on Cash, Dividends and Lending Activities (Details) $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2023 USD ($)
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Short-term investments held for discharge of obligations | $ 2,700 | $ 2,700
KeyBank (consolidated) |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Dividends paid by non banking subsidiaries |  | $ 675
Capacity to pay dividends | $ 2,300 |

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- Definition Short Term Investments Held For Discharge Of Obligations + References No definition available. + Details
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- Definition The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-14 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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