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Other Assets (Tables)
3 Months Ended
Mar. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Variable Interest Entities
The following table provides information as of March 31, 2013 (in millions):
Unamortized
investment balance
classified as Other Assets
 
Remaining
commitments classified
as Other Liabilities
 
Maximum
exposure to loss
$
422

 
$
18

 
$
422