Cover
| Cover | Oct. 25, 2021 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 25, 2021 |
| Entity Registrant Name | Truist Financial Corporation |
| Entity Address, Address Line One | 214 North Tryon Street |
| Entity Incorporation, State or Country Code | NC |
| Entity File Number | 1-10853 |
| City Area Code | 336 |
| Local Phone Number | 733-2000 |
| Entity Tax Identification Number | 56-0939887 |
| Entity Address, City or Town | Charlotte, |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 28202 |
| Written Communications | false |
| Pre-commencement Tender Offer | false |
| Soliciting Material | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Central Index Key | 0000092230 |
| Amendment Flag | false |
| Entity Emerging Growth Company | false |
| Current Fiscal Year End Date | --12-31 |
| Common Stock [Member] | |
| Entity Information [Line Items] | |
| Trading Symbol | TFC |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | Common Stock, $5 par value |
| Series I Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Trading Symbol | TFC.PI |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | Depositary Shares each representing 1/4,000th interest in a share of Series I Perpetual Preferred Stock |
| Series J Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Trading Symbol | TFC.PJ |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | 5.853% Fixed-to-Floating Rate Normal Preferred Purchase Securities each representing 1/100th interest in a share of Series J Perpetual Preferred Stock |
| Series O Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Trading Symbol | TFC.PO |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | Depositary Shares each representing 1/1,000th interest in a share of Series O Non-Cumulative Perpetual Preferred Stock |
| Series R Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Trading Symbol | TFC.PR |
| Security Exchange Name | NYSE |
| Title of 12(b) Security | Depositary Shares each representing 1/1,000th interest in a share of Series R Non-Cumulative Perpetual Preferred Stock |