Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
Derivatives - Derivatives Designated as Accounting Hedges - Fair Value Hedges (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative $ 1,779 $ (2,112) $ (616) $ (767)
Hedged Item (1,989) 1,857 (111) 57
Hedge Ineffectiveness (210) (255) (727) (710)
Interest rate risk on long-term debt | Interest expense        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative 1,921 (489) 724 612
Hedged Item (2,111) 265 (1,362) (1,239)
Hedge Ineffectiveness (190) (224) (638) (627)
Interest rate and foreign currency risk on long-term debt | Interest expense        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative (138) (1,631) (1,394) (1,368)
Hedged Item 125 1,620 1,311 1,305
Hedge Ineffectiveness (13) (11) (83) (63)
Interest rate risk on AFS securities | Interest income        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative (6) 1 39 (20)
Hedged Item (1) (21) (49) (5)
Hedge Ineffectiveness (7) (20) (10) (25)
Price risk on commodity inventory | Trading gain (loss)        
Effect of Fair Value Hedges on Results of Operations [Abstract]        
Derivative 2 7 15 9
Hedged Item $ (2) $ (7) (11) (4)
Hedge Ineffectiveness     $ 4 $ 5