XML 71 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 19, 2025
Jun. 28, 2024
Entity Information [Line Items]      
Document Type 10-K    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Entity File Number 1-11302    
Entity Registrant Name KeyCorp    
Entity Incorporation, State or Country Code OH    
Entity Tax Identification Number 34-6542451    
Entity Address, Address Line One 127 Public Square,    
Entity Address, City or Town Cleveland,    
Entity Address, State or Province OH    
Entity Address, Postal Zip Code 44114-1306    
City Area Code 216    
Local Phone Number 689-3000    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 13,402,865,321
Entity Common Stock, Shares Outstanding   1,105,119,318  
Documents Incorporated by Reference
Certain specifically designated portions of KeyCorp’s definitive Proxy Statement for its 2025 Annual Meeting of Shareholders are incorporated by reference into Part III of this Form 10-K.
    
Entity Central Index Key 0000091576    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Common Shares      
Entity Information [Line Items]      
Title of 12(b) Security Common Shares, $1 par value    
Trading Symbol KEY    
Security Exchange Name NYSE    
Series E Preferred Stock      
Entity Information [Line Items]      
Title of 12(b) Security Perpetual Non-Cumulative Preferred Stock, Series E)    
Trading Symbol KEY PrI    
Security Exchange Name NYSE    
Series F Preferred Stock      
Entity Information [Line Items]      
Title of 12(b) Security Cumulative Preferred Stock, Series F)    
Trading Symbol KEY PrJ    
Security Exchange Name NYSE    
Series G Preferred Stock      
Entity Information [Line Items]      
Title of 12(b) Security Cumulative Preferred Stock, Series G)    
Trading Symbol KEY PrK    
Security Exchange Name NYSE    
Series H Preferred Stock      
Entity Information [Line Items]      
Title of 12(b) Security Cumulative Preferred Stock, Series H)    
Trading Symbol KEY PrL    
Security Exchange Name NYSE