Quarterly report pursuant to Section 13 or 15(d)

Derivatives (Details)

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Derivatives (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Interest rate risk on USD denominated long-term borrowings | Interest expense
        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedge Ineffectiveness $ (174) $ (189) [1] $ (485) [1] $ (400) [1]
Interest rate risk on USD denominated long-term borrowings | Interest expense | Fair Value Hedging [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative (49) [1] 1,555 [1] 11 [1] 1,700 [1]
Hedged Item (125) [1],[2] (1,744) [1],[2] (496) [1],[2] (2,100) [1],[2]
Interest rate risk on foreign currency denominated long-term borrowings | Interest expense
        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedge Ineffectiveness (54) (58) [1] (148) [1] (164) [1]
Interest rate risk on foreign currency denominated long-term borrowings | Interest expense | Fair Value Hedging [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative (207) [1] (345) [1] (531) [1] 335 [1]
Hedged Item 153 [1],[2] 287 [1],[2] 383 [1],[2] (499) [1],[2]
Commodity price risk on commodity inventory | Principal Transactions
        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedge Ineffectiveness 0      
Commodity price risk on commodity inventory | Principal Transactions | Fair Value Hedging [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative (24) [1] 16 [1] (10) [1] 0 [1]
Hedged Item 24 [1],[2] (16) [1],[2] 10 [1],[2] 0 [1],[2]
Long-term Borrowings [Member] | Fair Value Hedging [Member] | Designated as hedging instrument
        
Derivative Instruments, Gain (Loss) [Line Items]        
Fair Value Hedge Assets 6,177 6,940 6,177 6,940
Fair Value Hedge Liabilities 887 841 887 841
Long-term Borrowings [Member] | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Account Assets [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments 37,019 44,180 37,019 44,180
Long-term Borrowings [Member] | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Liabilities [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments 9,813 11,092 9,813 11,092
Commodity risk | Fair Value Hedging [Member] | Designated as hedging instrument
        
Derivative Instruments, Gain (Loss) [Line Items]        
Fair Value Hedge Assets 28 70 28 70
Fair Value Hedge Liabilities 2 5 2 5
Commodity risk | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Account Assets [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments 115 152 115 152
Commodity risk | Fair Value Hedging [Member] | Designated as hedging instrument | Trading Liabilities [Member]
        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional Amount of Fair Value Hedge Instruments $ 6 $ 6 $ 6 $ 6
[1] Amounts are recorded in interest expense and other revenues for long-term borrowings and principal transactions for commodity inventory.
[2] Excludes the impact of the accretion of purchase accounting adjustments made to certain long-term borrowings in connection with the acquisition of Merrill Lynch by Bank of America.