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Fair Value Option (Tables)
 6 Months Ended
Jun. 30, 2013
Fair Value, Options [Abstract]  
Components of Gain (Loss) on Debt Designated at Fair Value and Related Derivatives
The components of gain (loss) on debt designated at fair value and related derivatives are as follows:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2013
 
2012
 
2013
 
2012
 
(in millions)
Mark-to-market on debt designated at fair value(1):
 
 
 
 
 
 
 
Interest rate component
$
119

 
$
12

 
$
205

 
$
91

Credit risk component
23

 
18

 
(18
)
 
(461
)
Total mark-to-market on debt designated at fair value
142

 
30

 
187

 
(370
)
Mark-to-market on the related derivatives(1)
(107
)
 
(46
)
 
(220
)
 
(162
)
Net realized gains on the related derivatives
84

 
108

 
168

 
228

Gain (loss) on debt designated at fair value and related derivatives
$
119

 
$
92

 
$
135

 
$
(304
)
 
(1) 
Mark-to-market on debt designated at fair value and related derivatives excludes market value changes due to fluctuations in foreign currency exchange rates. Foreign currency translation gains (losses) recorded in derivative related income (expense) associated with debt designated at fair value was a loss of $29 million and a gain of $144 million during the three months ended June 30, 2013 and 2012, respectively, and a gain of $81 million and a gain of $84 million during the six months ended June 30, 2013 and 2012, respectively. Offsetting gains (losses) recorded in derivative related income (expense) associated with the related derivatives was a gain of $29 million and a loss of $144 million during the three months ended June 30, 2013 and 2012, respectively, and a loss of $81 million and a loss of $84 million during the six months ended June 30, 2013 and 2012, respectively.