Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Derivatives Designated as Accounting Hedges - Fair Value Hedges (Details)

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Derivatives - Derivatives Designated as Accounting Hedges - Fair Value Hedges (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative $ (3,000) $ (3,383) $ (4,667) $ (1,258)
Hedged Item 2,792 2,919 4,199 686
Hedge Ineffectiveness (208) (464) (468) (572)
Interest rate risk on long-terrn debt [Member] | Interest rate risk on long-term debt [Member]
       
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative (2,407) [1] 1,410 [1] (3,383) [1] 409 [1]
Hedged Item 2,239 [1] (1,644) [1] 3,033 [1] (880) [1]
Hedge Ineffectiveness (168) [1] (234) [1] (350) [1] (471) [1]
Interest rate and foreign currency risk on long-term debt [Member] | Interest rate risk on long-term debt [Member]
       
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative (582) [1] (894) [1] (2,120) [1] (739) [1]
Hedged Item 548 [1] 785 [1] 2,004 [1] 612 [1]
Hedge Ineffectiveness (34) [1] (109) [1] (116) [1] (127) [1]
Interest rate risk on AFS securities [Member] | Interest rate risk on AFS securities [Member]
       
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative (14) [2] (3,890) [2] 836 [2] (942) [2]
Hedged Item 9 [2] 3,769 [2] (837) [2] 968 [2]
Hedge Ineffectiveness (5) [2] (121) [2] (1) [2] 26 [2]
Commodity price risk on commodity inventory [Member] | Commodity price risk on commodity inventory [Member]
       
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative 3 [3] (9) [3] 0 [3] 14 [3]
Hedged Item (4) [3] 9 [3] (1) [3] (14) [3]
Hedge Ineffectiveness $ (1) [3]   $ (1) [3]  
[1] Amounts are recorded in interest expense on long-term debt and in other income (loss).
[2] Amounts are recorded in interest income on debt securities.
[3] Amounts relating to commodity inventory are recorded in trading account profits.