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Borrowings and Deposits - Related Party (Details) (USD $)
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9 Months Ended | 9 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2012
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Dec. 31, 2011
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Sep. 30, 2012
Extendible One-Year Revolving Credit Facility
Revolving Credit Facility
Bank of America
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Sep. 30, 2012
Revolving Unsecured Line of Credit Maturing February 2013 [Member]
Revolving Credit Facility
Bank of America
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Sep. 30, 2012
Revolving Unsecured Line of Credit Maturing February 2013 [Member]
Bank of America
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Sep. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Subordinated Loan Agreement Maturing December 2013
Bank of America
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Jun. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Subordinated Loan Agreement Maturing December 2013
Bank of America
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Sep. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Revolving Subordinated Line of Credit Maturing October 2013
Revolving Credit Facility
Bank of America
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Jun. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Revolving Subordinated Line of Credit Maturing October 2013
Revolving Credit Facility
Bank of America
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Jun. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Senior And Subordinated Debt
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Mar. 31, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Senior And Subordinated Debt
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Sep. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Revolving Unsecured Line of Credit Maturing November 2012
Revolving Credit Facility
Bank of America
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Sep. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Revolving 364-day Unsecured Line of Credit Maturing February 2013
Revolving Credit Facility
Bank of America
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Jun. 30, 2012
Merrill Lynch Pierce Fenner & Smith Incorporated
Subordinated Debt
Bank of America
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| Debt Instrument [Line Items] | ||||||||||||||
| Debt securities guaranteed by Bank of America | $ 6,600,000,000 | |||||||||||||
| Maximum borrowing capacity under line of credit | 75,000,000,000 | 25,000,000,000 | 7,000,000,000 | 4,000,000,000 | 15,000,000,000 | |||||||||
| Amount outstanding under line of credit | 4,100,000,000 | 900,000,000 | ||||||||||||
| Subordinated loan agreement, maximum loan capacity | 10,719,000,000 | 12,661,000,000 | 1,500,000,000 | |||||||||||
| Debt Instrument, Automatic Extension Period | 1 year | 1 year | 1 year | 1 year | ||||||||||
| Debt Instrument, Cancellation Notice, Period | 45 days | 13 months | 45 days | 45 days | ||||||||||
| Extinguishment of Debt, Amount | 551,000,000 | |||||||||||||
| Early repayment of subordinated notes | 474,000,000 | 1,200,000,000 | 2,600,000,000 | |||||||||||
| Gain on retirement of subordinated notes | $ 77,000,000 | $ 328,000,000 | ||||||||||||