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, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative $ (3,383) $ 958 $ (1,258) $ 1,922
Hedged Item 2,919 (1,371) 686 (2,468)
Hedge Ineffectiveness (464) (413) (572) (546)
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 1,410 [1] 1,373 [1] 409 [1] 439 [1]
Hedged Item (1,644) [1] (1,494) [1] (880) [1] (705) [1]
Hedge Ineffectiveness (234) [1] (121) [1] (471) [1] (266) [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 (894) [1] 1,438 [1] (739) [1] 2,188 [1]
Hedged Item 785 [1] (1,487) [1] 612 [1] (2,293) [1]
Hedge Ineffectiveness (109) [1] (49) [1] (127) [1] (105) [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 (3,890) [2] (1,873) [2] (942) [2] (721) [2]
Hedged Item 3,769 [2] 1,630 [2] 968 [2] 546 [2]
Hedge Ineffectiveness (121) [2] (243) [2] 26 [2] (175) [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 (9) [3] 20 [3] 14 [3] 16 [3]
Hedged Item $ 9 [3] $ (20) [3] $ (14) [3] $ (16) [3]
[1] Amounts are recorded in interest expense on long-term debt and in other income.
[2] Amounts are recorded in interest income on AFS securities.
[3] Amounts relating to commodity inventory are recorded in trading account profits.