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INVESTMENTS (Details - Purchased Credit Impaired (PCI) Securities) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Available-for-sale Securities Disclosures          
Amortized cost $ 242,917   $ 242,917   $ 243,307
Fair value 259,821   259,821   264,254
Purchased Credit Impaired (PCI) Securities          
Available-for-sale Securities Disclosures          
Contractually required payments (principal and interest) 32,118   32,118    
Cash flows expected to be collected 25,976   25,976    
Recorded investment in acquired securities 17,330   17,330    
Outstanding principal balance 17,232   17,232   16,962
Amortized cost 12,542   12,542   12,216
Fair value 13,669   13,669   $ 13,462
Changes in activity for the accretable yield on PCI securities:          
Balance, beginning of year 6,765 $ 7,170 6,865 $ 6,940  
Newly purchased PCI securities 170 247 415 769  
Disposals (13) 0 (13) 0  
Accretion (221) (219) (441) (431)  
Effect of changes in interest rate indices (6) (172) (144) (231)  
Net reclassification from non-accretable difference, including effects of prepayments 138 16 151 (5)  
Balance, end of year $ 6,833 $ 7,042 $ 6,833 $ 7,042