v3.26.3
Borrowings - Long Term Debt, Interest Rates and Maturity Dates (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Debt Instruments [Line Items]    
Total long-term debt $ 53,373 $ 41,963
Truist Financial Corporation: | Senior notes | Fixed rate    
Debt Instruments [Line Items]    
Total long-term debt 20,880 20,093
Truist Financial Corporation: | Subordinated notes | Fixed rate    
Debt Instruments [Line Items]    
Total long-term debt 1,537 1,818
Truist Financial Corporation: | Capital notes    
Debt Instruments [Line Items]    
Total long-term debt 643 639
Truist Bank: | Senior notes | Fixed rate    
Debt Instruments [Line Items]    
Total long-term debt 4,834 4,476
Truist Bank: | Senior notes | Floating rate    
Debt Instruments [Line Items]    
Total long-term debt 849 499
Truist Bank: | Subordinated notes | Fixed rate    
Debt Instruments [Line Items]    
Total long-term debt 1,891 3,553
Truist Bank: | Floating-rate FHLB advances | Floating rate    
Debt Instruments [Line Items]    
Total long-term debt 21,100 9,450
Truist Bank: | Other long-term debt    
Debt Instruments [Line Items]    
Total long-term debt $ 1,639 $ 1,435