Regulatory Requirements and Other Restrictions Regulatory Requirements (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Supplementary Leverage Capital:
Banking Regulation, Additional Capital Requirement	$ 2,700
Truist Financial Corporation
CET1 Capital:
Minimum Capital (1)	4.50%
Actual Capital, Ratio	9.00%	9.60%
Actual Capital, Amount	$ 39,098	$ 37,524
Tier 1 Capital:
Minimum Capital (1)	6.00%
Well Capitalized	6.00%
Actual Capital, Ratio	10.50%	11.30%
Actual Capital, Amount	$ 45,768	$ 44,194
Total Capital:
Minimum Capital (1)	8.00%
Well Capitalized	10.00%
Actual Capital, Ratio	12.40%	13.20%
Actual Capital, Amount	$ 54,072	$ 51,518
Leverage Capital:
Minimum Capital (1)	4.00%
Actual Capital, Ratio	8.50%	8.70%
Actual Capital, Amount	$ 45,768	$ 44,194
Supplementary Leverage Capital:
Minimum Capital (1)	3.00%
Actual Capital, Ratio	7.30%	7.40%
Actual Capital, Amount	$ 45,768	$ 44,194
Truist Financial Corporation | Min
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Stressed Capital Conservation Buffer	2.50%
Truist Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum	2.50%
CET1 Capital:
Minimum Capital (1)	4.50%
Actual Capital, Ratio	10.60%	10.50%
Well Capitalized	6.50%
Actual Capital, Amount	$ 45,237	$ 39,908
Tier 1 Capital:
Minimum Capital (1)	6.00%
Well Capitalized	8.00%
Actual Capital, Ratio	10.60%	10.50%
Actual Capital, Amount	$ 45,237	$ 39,908
Total Capital:
Minimum Capital (1)	8.00%
Well Capitalized	10.00%
Actual Capital, Ratio	12.10%	12.00%
Actual Capital, Amount	$ 51,633	$ 45,562
Leverage Capital:
Minimum Capital (1)	4.00%
Well Capitalized	5.00%
Actual Capital, Ratio	8.50%	8.00%
Actual Capital, Amount	$ 45,237	$ 39,908
Supplementary Leverage Capital:
Minimum Capital (1)	3.00%
Actual Capital, Ratio	7.30%	6.90%
Actual Capital, Amount	$ 45,237	$ 39,908