Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Credit Extension Commitments (Details)

v2.4.1.9
Commitments and Contingencies - Credit Extension Commitments (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Other Commitments [Line Items]    
Expire in One Year or Less $ 471,320bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess $ 486,482bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
Expire After One Year Through Three Years 126,525bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears 131,772bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
Expire After Three Years Through Five Years 163,616bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears 157,244bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
Expire After Five Years 36,254bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears 40,535bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
Notional Amount of Credit Extension Commitments 797,715bac_CreditExtensionCommitmentsNotionalAmount 816,033bac_CreditExtensionCommitmentsNotionalAmount
Loan commitments    
Other Commitments [Line Items]    
Expire in One Year or Less 79,897bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember 		80,799bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember
Expire After One Year Through Three Years 97,583bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember 		105,175bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember
Expire After Three Years Through Five Years 146,743bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember 		133,290bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember
Expire After Five Years 18,942bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember 		21,864bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember
Notional Amount of Credit Extension Commitments 343,165bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember 		341,128bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanPurchaseCommitmentsMember
Home equity lines of credit    
Other Commitments [Line Items]    
Expire in One Year or Less 6,292bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember 		4,580bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember
Expire After One Year Through Three Years 19,679bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember 		16,855bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember
Expire After Three Years Through Five Years 12,319bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember 		21,074bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember
Expire After Five Years 15,417bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember 		14,301bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember
Notional Amount of Credit Extension Commitments 53,707bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember 		56,810bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_HomeEquityMember
Standby letters of credit and financial guarantees    
Other Commitments [Line Items]    
Expire in One Year or Less 19,259bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember 		21,994bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
Expire After One Year Through Three Years 9,106bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember 		8,843bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
Expire After Three Years Through Five Years 4,519bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember 		2,876bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
Expire After Five Years 1,807bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember 		3,967bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
Notional Amount of Credit Extension Commitments 34,691bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember 		37,680bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
Standby letters of credit and financial guarantees | Investment grade    
Other Commitments [Line Items]    
Notional Amount of Credit Extension Commitments 26,100bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
/ us-gaap_InternalCreditAssessmentAxis
= bac_InternalInvestmentGradeMember 		27,600bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
/ us-gaap_InternalCreditAssessmentAxis
= bac_InternalInvestmentGradeMember
Standby letters of credit and financial guarantees | Non-investment grade    
Other Commitments [Line Items]    
Notional Amount of Credit Extension Commitments 8,200bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
/ us-gaap_InternalCreditAssessmentAxis
= bac_InternalNoninvestmentGradeMember 		9,600bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
/ us-gaap_InternalCreditAssessmentAxis
= bac_InternalNoninvestmentGradeMember
Letters of credit    
Other Commitments [Line Items]    
Expire in One Year or Less 1,883bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember 		1,263bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember
Expire After One Year Through Three Years 157bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember 		899bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember
Expire After Three Years Through Five Years 35bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember 		4bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember
Expire After Five Years 88bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember 		403bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember
Notional Amount of Credit Extension Commitments 2,163bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember 		2,569bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember
Legally binding commitments    
Other Commitments [Line Items]    
Expire in One Year or Less 107,331bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember 		108,636bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Expire After One Year Through Three Years 126,525bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember 		131,772bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Expire After Three Years Through Five Years 163,616bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember 		157,244bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Expire After Five Years 36,254bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember 		40,535bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Notional Amount of Credit Extension Commitments 433,726bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember 		438,187bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Credit card lines    
Other Commitments [Line Items]    
Expire in One Year or Less 363,989bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember 		377,846bac_CreditExtensionCommitmentsNotionalAmountExpirationinOneYearorLess
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember
Expire After One Year Through Three Years 0bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember 		0bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterOneYearThroughThreeYears
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember
Expire After Three Years Through Five Years 0bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember 		0bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterThreeYearsThroughFiveYears
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember
Expire After Five Years 0bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember 		0bac_CreditExtensionCommitmentsNotionalAmountExpirationAfterFiveYears
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember
Notional Amount of Credit Extension Commitments 363,989bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember 		377,846bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= bac_CreditCardLinesMember
Credit Card and Other Consumer | Standby letters of credit and financial guarantees    
Other Commitments [Line Items]    
Notional Amount of Credit Extension Commitments $ 396bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ConsumerPortfolioSegmentMember 		$ 453bac_CreditExtensionCommitmentsNotionalAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ConsumerPortfolioSegmentMember