Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-42

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-42

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-33

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-34

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-33

+ Details

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 310
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481746/310-40-50-4

+ Details

Name:	us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tfc_CommercialAndIndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tfc_HomeEquityLendingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_AutomobileLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=tfc_OtherConsumerLendingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CreditCardReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=tfc_NewlyDesignatedTDRsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_InterestRateBelowMarketReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=tfc_ReModificationofPreviouslyDesignatedTDRsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans and ACL - Types of Modifications and Allowance at Period End (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	$ 769		$ 1,365
Commercial: \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	330		564
Commercial: \| CRE
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	49		187
Commercial: \| Commercial construction
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	2		3
Consumer: \| Residential mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	213		403
Consumer: \| Home equity
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	4		7
Consumer: \| Indirect auto
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	159		177
Consumer: \| Other consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	7		15
Credit card
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	5		9
Structure
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	37		74
Structure \| Commercial: \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	0		0
Structure \| Commercial: \| CRE
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	0		0
Structure \| Commercial: \| Commercial construction
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	0		0
Structure \| Consumer: \| Residential mortgage
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	25		53
Structure \| Consumer: \| Home equity
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	0		0
Structure \| Consumer: \| Indirect auto
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	7		12
Structure \| Consumer: \| Other consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	5		9
Structure \| Credit card
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0		$ 0
Newly Designated TDRs \| Commercial:
Financing Receivable, Modifications [Line Items]
Related ALLL at Period End		$ 0		$ 0
Financing Receivable, Troubled Debt Restructuring, Premodification		1		11
Newly Designated TDRs \| Consumer:
Financing Receivable, Modifications [Line Items]
Related ALLL at Period End		14		29
Financing Receivable, Troubled Debt Restructuring, Premodification		293		622
Newly Designated TDRs \| Credit card
Financing Receivable, Modifications [Line Items]
Related ALLL at Period End		1		2
Financing Receivable, Troubled Debt Restructuring, Premodification		2		4
Newly Designated TDRs \| Rate \| Commercial:
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		0		0
Newly Designated TDRs \| Rate \| Consumer:
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		97		245
Newly Designated TDRs \| Rate \| Credit card
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		2		4
Newly Designated TDRs \| Structure \| Commercial:
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		1		9
Newly Designated TDRs \| Structure \| Consumer:
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		197		388
Newly Designated TDRs \| Structure \| Credit card
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		0		0
Re-Modification of Previously Designated TDRs \| Rate
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		9		30
Re-Modification of Previously Designated TDRs \| Structure
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified in Period, Amount		$ 29		$ 40