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Fair Value Disclosures (Notional or Contractual Amounts and Fair Values of Off-Balance Sheet Financial Instruments) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Residential mortgage loans sold with recourse $ 649bbt_ResidentialMortgageLoansSoldWithRecourse $ 667bbt_ResidentialMortgageLoansSoldWithRecourse
Other loans sold with recourse 4,235bbt_CommercialMortgageLoansSoldWithRecourseLiability 4,264bbt_CommercialMortgageLoansSoldWithRecourseLiability
Letters of credit and financial guarantees 3,422bbt_StandbyAndCommercialLettersOfCredit 3,462bbt_StandbyAndCommercialLettersOfCredit
Notional Or Contract Amount [Member]    
Commitments to extend, originate or purchase credit 51,588bbt_CommitmentsToExtendOriginateOrPurchaseCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
49,333bbt_CommitmentsToExtendOriginateOrPurchaseCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
Residential mortgage loans sold with recourse 649bbt_ResidentialMortgageLoansSoldWithRecourse
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
667bbt_ResidentialMortgageLoansSoldWithRecourse
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
Other loans sold with recourse 4,235bbt_CommercialMortgageLoansSoldWithRecourseLiability
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
4,264bbt_CommercialMortgageLoansSoldWithRecourseLiability
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
Letters of credit and financial guarantees 3,422bbt_StandbyAndCommercialLettersOfCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
3,462bbt_StandbyAndCommercialLettersOfCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_NotionalOrContractAmountMember
Fair Value [Member]    
Commitments to extend, originate or purchase credit 104bbt_CommitmentsToExtendOriginateOrPurchaseCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember
97bbt_CommitmentsToExtendOriginateOrPurchaseCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember
Residential mortgage loans sold with recourse 9bbt_ResidentialMortgageLoansSoldWithRecourse
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember
9bbt_ResidentialMortgageLoansSoldWithRecourse
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember
Other loans sold with recourse 7bbt_CommercialMortgageLoansSoldWithRecourseLiability
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember
7bbt_CommercialMortgageLoansSoldWithRecourseLiability
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember
Letters of credit and financial guarantees $ 24bbt_StandbyAndCommercialLettersOfCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember
$ 22bbt_StandbyAndCommercialLettersOfCredit
/ us-gaap_FinancialInstrumentAxis
= bbt_FairValueMember