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Fair Value Option (Tables)
 3 Months Ended
Mar. 31, 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 March 31,
2013
 
2012
 
(in millions)
Mark-to-market on debt designated at fair value(1):
 
 
 
Interest rate component
$
86

 
$
79

Credit risk component
(41
)
 
(479
)
Total mark-to-market on debt designated at fair value
45

 
(400
)
Mark-to-market on the related derivatives(1)
(113
)
 
(116
)
Net realized gains on the related derivatives
84

 
120

Gain (loss) on debt designated at fair value and related derivatives
$
16

 
$
(396
)
 
(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 gain of $110 million and a loss of $60 million during the three months ended March 31, 2013 and 2012, respectively. Offsetting gains (losses) recorded in derivative related income (expense) associated with the related derivatives was a loss of $110 million and a gain of $60 million during the three months ended March 31, 2013 and 2012, respectively.