v3.26.1
Document And Entity Information
 3 Months Ended
Mar. 31, 2026
shares
Document and Entity Information [Abstract]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Mar. 31, 2026
Document Transition Report false
Entity File Number 001-37811
Entity Registrant Name BOK FINANCIAL CORP
Entity Incorporation, State or Country Code OK
Entity Tax Identification Number 73-1373454
Entity Address, Address Line One Boston Avenue at Second Street
Entity Address, City or Town Tulsa,
Entity Address, State or Province OK
Entity Address, Postal Zip Code 74172
City Area Code 918
Local Phone Number 588-6000
Title of 12(b) Security Common Stock, par value $0.00006 per share
Trading Symbol BOKF
Security Exchange Name NASDAQ
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
Entity Shell Company false
Entity Common Stock, Shares Outstanding 60,759,992
Entity Central Index Key 0000875357
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2026
Document Fiscal Period Focus Q1
Amendment Flag false