Document and Entity Information
Jun. 07, 2021
Document And Entity Information [Line Items]  
Entity Registrant Name TRUIST FINANCIAL CORP
Amendment Flag false
Entity Central Index Key 0000092230
Document Type 8-K
Document Period End Date Jun. 07, 2021
Entity File Number 1-10853
Entity Incorporation State Country Code NC
Entity Tax Identification Number 56-0939887
Entity Address, Address Line One 214 North Tryon Street
Entity Address, City or Town Charlotte
Entity Address, State or Province NC
Entity Address, Postal Zip Code 28202
City Area Code (336)
Local Phone Number 733-2000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, $5 par value
Trading Symbol TFC
Security Exchange Name NYSE
Depositary Shares Each Representing 14000th Interest In A Share Of Series I Perpetual Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Depositary Shares each representing 1/4,000th interest in a share of Series I Perpetual Preferred Stock
Trading Symbol TFC.PI
Security Exchange Name NYSE
Auction Rate Preferred Securities [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 5.853% Fixed-to-Floating Rate Normal Preferred Purchase Securities each representing 1/100th interest in a share of Series J Perpetual Preferred Stock
Trading Symbol TFC.PJ
Security Exchange Name NYSE
Depositary Shares Each Representing 11000th Interest In A Share Of Series O Not Cumulative Perpetual Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Depositary shares, each representing 1/1,000th interest in a share of Series O Non-Cumulative Perpetual Preferred Stock
Trading Symbol TFC.PO
Security Exchange Name NYSE
Depositary Shares Each Representing 11000th Interest In A Share Of Series R Not Cumulative Perpetual Preferred Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Depositary Shares each representing 1/1,000th interest in a share of Series R Non-Cumulative Perpetual Preferred Stock
Trading Symbol TFC.PR
Security Exchange Name NYSE