v2.4.0.6
Securities Available for Sale (Schedule of Available for Sale Securities) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Amortized Cost $ 39,612 $ 30,282
Gross Unrealized Gains 277 236
Gross Unrealized Losses 20 23
Other-than-Temporary Impairment 0 0
Securities available for sale, at fair value 39,869 30,495
Debt Securities
   
Amortized Cost 39,597 30,267
Gross Unrealized Gains 277 236
Gross Unrealized Losses 13 23
Other-than-Temporary Impairment 0 0
Securities available for sale, at fair value 39,861 30,480
U.S. Government and Agency Securities
   
Amortized Cost 29,681  
Gross Unrealized Gains 231  
Gross Unrealized Losses 5  
Other-than-Temporary Impairment 0  
Securities available for sale, at fair value 29,907  
U.S. Treasury Securities
   
Amortized Cost 14,351 13,240
Gross Unrealized Gains 109 182
Gross Unrealized Losses 2 0
Other-than-Temporary Impairment 0 0
Securities available for sale, at fair value 14,458 13,422
U.S. Agency Securities
   
Amortized Cost 15,330 16,083
Gross Unrealized Gains 122 54
Gross Unrealized Losses 3 20
Other-than-Temporary Impairment 0 0
Securities available for sale, at fair value 15,449 16,117
Corporate and Other Debt
   
Amortized Cost 9,916 944 [1]
Gross Unrealized Gains 46 0 [1]
Gross Unrealized Losses 8 3 [1]
Other-than-Temporary Impairment 0 0 [1]
Securities available for sale, at fair value 9,954 941 [1]
Agency
   
Amortized Cost 2,197  
Gross Unrealized Gains 6  
Gross Unrealized Losses 4  
Other-than-Temporary Impairment 0  
Securities available for sale, at fair value 2,199  
Non-Agency
   
Amortized Cost 160  
Gross Unrealized Gains 0  
Gross Unrealized Losses 0  
Other-than-Temporary Impairment 0  
Securities available for sale, at fair value 160  
Auto Loan Asset-backed Securities
   
Amortized Cost 1,993  
Gross Unrealized Gains 4  
Gross Unrealized Losses 1  
Other-than-Temporary Impairment 0  
Securities available for sale, at fair value 1,996  
Corporate Bonds
   
Amortized Cost 2,891  
Gross Unrealized Gains 13  
Gross Unrealized Losses 3  
Other-than-Temporary Impairment 0  
Securities available for sale, at fair value 2,901  
FFELP Student Loan Asset-backed Securities
   
Amortized Cost 2,675 [2]  
Gross Unrealized Gains 23 [2]  
Gross Unrealized Losses 0 [2]  
Other-than-Temporary Impairment 0 [2]  
Securities available for sale, at fair value 2,698 [2]  
Percent of principal balance and interest guaranteed by the U.S. Department of Education 95.00% 95.00%
Equity Securities
   
Amortized Cost 15 15
Gross Unrealized Gains 0 0
Gross Unrealized Losses 7 0
Other-than-Temporary Impairment 0 0
Securities available for sale, at fair value $ 8 $ 15
[1] Amounts represent FFELP student loan asset-backed securities, in which the loans are backed by a guarantee from the U.S. Department of Education of at least 95% of the principal balance and interest on such loans.
[2] Amounts are backed by a guarantee from the U.S. Department of Education of at least 95% of the principal balance and interest on such loans.