Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2023
Feb. 14, 2024
Jun. 30, 2023
Entity Central Index Key 0000883948    
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-39325    
Entity Tax Identification Number 54-1598552    
Entity Incorporation, State or Country Code VA    
Entity Address, Address Line One 4300 Cox Road    
Entity Address, City or Town Glen Allen    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 23060    
City Area Code 804    
Local Phone Number 633-5031    
Document Period End Date Dec. 31, 2023    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Amendment Flag false    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2023    
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 Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
ICFR Auditor Attestation Flag true    
Entity Public Float     $ 1,928,301,553
Auditor Name Ernst & Young LLP    
Auditor Firm ID 42    
Auditor Location Richmond, Virginia    
Entity Common Stock, Shares Outstanding   75,084,066  
Document Financial Statement Error Correction [Flag] false    
Common Stock, Class A      
Title of 12(b) Security Common Stock, par value $1.33 per share    
Trading Symbol AUB    
Security Exchange Name NYSE    
Series A Preferred Stock      
Title of 12(b) Security Depositary Shares, Each Representing a 1/400th Interest in a Share of 6.875% Perpetual Non-Cumulative Preferred Stock, Series A    
Trading Symbol AUB.PRA    
Security Exchange Name NYSE