Borrowings - Narrative (Details) - Senior notes - Subsequent Event - USD ($) $ in Millions	Jul. 28, 2025	Jul. 24, 2025
Truist Financial Corporation | Fixed rate
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount	$ 1,500
Truist Bank | Fixed rate
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 1,500
Debt Instrument, Interest Rate, Stated Percentage		4.42%
Truist Bank | Floating rate
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500