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Long-term Debt - Narrative (Details) (USD $)
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12 Months Ended | ||||||||||||||||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2012
Credit Card [Member]
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Dec. 31, 2012
Automobiles [Member]
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Dec. 31, 2012
Home Equity Line of Credit [Member]
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Dec. 31, 2012
Other Variable Interest Entities [Member]
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Dec. 31, 2012
Bank of America Corporation [Member]
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Dec. 31, 2011
Bank of America Corporation [Member]
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Dec. 31, 2012
Parent Company And Other Subsidiaries Member [Member]
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Dec. 31, 2011
Parent Company And Other Subsidiaries Member [Member]
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Dec. 31, 2012
Subsidiary of Common Parent [Member]
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Dec. 31, 2011
Subsidiary of Common Parent [Member]
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Dec. 31, 2011
Exhange Agreement 2011 Trust Securities [Member]
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Dec. 31, 2011
Exhange Agreement 2011 Trust Securities [Member]
Trust Securities [Member]
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Dec. 31, 2011
Exhange Agreement 2011 Trust Securities [Member]
Common Stock [Member]
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Dec. 31, 2011
Exchange Agreement 2011 Junior Subordinated [Member]
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Dec. 31, 2011
Exchange Agreement 2011 Junior Subordinated [Member]
Junior Subordinated Debt [Member]
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Dec. 31, 2011
Exchange Agreement 2011 HITS [Member]
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Dec. 31, 2011
Exchange Agreement 2011 HITS [Member]
Junior Subordinated Debt [Member]
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Dec. 31, 2011
Exchange Agreement 2011 HITS [Member]
HITS [Member]
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Dec. 31, 2011
Exchange Agreement 2011 HITS [Member]
Common Stock [Member]
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| Debt Instrument [Line Items] | |||||||||||||||||||||
| Foreign Currency Denominated Debt Translated Into US Dollars | $ 95,300,000,000 | $ 117,000,000,000 | |||||||||||||||||||
| Long Term Debt Of Consolidated Variable Interest Entities | 22,300,000,000 | 713,000,000 | 2,300,000,000 | 8,900,000,000 | |||||||||||||||||
| Maximum Authorized Debt For Further Issuance | 154,900,000,000 | 69,800,000,000 | |||||||||||||||||||
| Maximum Authorized Bank Notes For Further Issuance | 65,500,000,000 | 62,400,000,000 | |||||||||||||||||||
| Maximum Of Bank Notes Outstanding With Fixed Or Floating Rate | 75,000,000,000 | ||||||||||||||||||||
| Notes Payable to Bank | 5,600,000,000 | 6,300,000,000 | |||||||||||||||||||
| Maximum Authorized Mortgage Notes For Further Issuance | 20,600,000,000 | ||||||||||||||||||||
| Name Of Mortgage Bond Program | 30,000,000,000 | ||||||||||||||||||||
| Weighted Average Effective Interest Rates For Total Long Term Debt Excluding Structured Notes | 4.71% | 4.35% | 4.73% | 4.74% | |||||||||||||||||
| Weighted Average Effective Interest Rates For Total Fixed Rate Debt | 5.52% | 5.17% | |||||||||||||||||||
| Weighted Average Effective Interest Rates For Total Floating Rate Debt | 0.93% | 1.38% | |||||||||||||||||||
| Long Term Debt Not Assumed Or Guaranteed By Corporation | 89,000,000,000 | ||||||||||||||||||||
| Issuance of common stock, shares | 282,000,000 | 26,000,000 | |||||||||||||||||||
| Issuance of common stock | 1,600,000,000 | 138,000,000 | |||||||||||||||||||
| Proceeds from Issuance of Senior Long-term Debt | 1,500,000,000 | 505,000,000 | |||||||||||||||||||
| Extinguishment of Debt, Amount | 3,800,000,000 | 4,300,000,000 | 915,000,000 | 917,000,000 | |||||||||||||||||
| Gains (Losses) on Extinguishment of Debt | 1,200,000,000 | (12,000,000) | |||||||||||||||||||
| Adjustment to Additional Paid in Capital Negotiated Exchanges | $ 284,000,000 | ||||||||||||||||||||