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Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Jan. 31, 2025
Jun. 30, 2024
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Registrant Name STIFEL FINANCIAL CORP    
Entity Central Index Key 0000720672    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Tax Identification Number 43-1273600    
Entity Address, Address Line One 501 North Broadway    
Entity Address, City or Town St. Louis    
Entity Address, State or Province MO    
Entity Address, Postal Zip Code 63102-2188    
City Area Code 314    
Local Phone Number 342-2000    
Entity File Number 001-09305    
Entity Incorporation, State or Country Code DE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Public Float     $ 8.9
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Document Annual Report true    
Document Transition Report false    
Auditor Firm ID 42    
Auditor Name Ernst & Young LLP    
Auditor Location St. Louis, Missouri    
Documents Incorporated by Reference

Portions of the Proxy Statement for the annual meeting of shareholders, to be filed within 120 days of our fiscal year ended December 31, 2024, are incorporated by reference in Part III hereof.

    
Document Financial Statement Error Correction [Flag] false    
Auditor Opinion [Text Block]

Opinion on the Financial Statements

We have audited the accompanying consolidated statements of financial condition of Stifel Financial Corp. (the Company) as of December 31, 2024 and 2023, the related consolidated statements of operations, comprehensive income, changes in shareholders' equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 26, 2025 expressed an unqualified opinion thereon.

Opinion on Internal Control over Financial Reporting

We have audited Stifel Financial Corp.’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Stifel Financial Corp. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated statements of financial condition of the Company as of December 31, 2024 and 2023, the related consolidated statements of operations, comprehensive income, changes in shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2024 and the related notes, and our report dated February 26, 2025, expressed an unqualified opinion thereon.

    
Common Stock [Member]      
Document Information [Line Items]      
Trading Symbol SF    
Title of 12(b) Security Common Stock, $0.15 par value per share    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   103,754,995  
Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series B [Member]      
Document Information [Line Items]      
Trading Symbol SF-PB    
Title of 12(b) Security Depository Shares, each representing 1/1,000th interest in a share of 6.25% Non-Cumulative Preferred Stock, Series B    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   6,400  
Depository Shares, each representing 1/1,000th interest in a share of 6.125% Non-Cumulative Preferred Stock, Series C [Member]      
Document Information [Line Items]      
Trading Symbol SF-PC    
Title of 12(b) Security Depository Shares, each representing 1/1,000th interest in a share of 6.125% Non-Cumulative Preferred Stock, Series C (SF-PC)    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   9,000  
Depository Shares, each representing 1/1,000th interest in a share of 4.50% Non-Cumulative Preferred Stock, Series D [Member]      
Document Information [Line Items]      
Trading Symbol SF-PD    
Title of 12(b) Security Depository Shares, each representing 1/1,000th interest in a share of 4.50% Non-Cumulative Preferred Stock, Series D    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   12,000  
Senior notes 5.20% due 2047 [Member]      
Document Information [Line Items]      
Trading Symbol SFB    
Title of 12(b) Security 5.20% Senior Notes due 2047    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   225,000,000