Quarterly report pursuant to Section 13 or 15(d)

Securities - Expected Maturity (Details)

v2.4.0.8
Securities - Expected Maturity (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]    
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount $ 6 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, within One Year 5.00% [1],[2]  
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount 73 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after One Through Five Years 2.26% [1],[2]  
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount 53,778 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after Five Through Ten Years 2.54% [1],[2]  
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount 1,065 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after Ten Years 2.57% [1],[2]  
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount 54,922 [1] 49,481
Held-to-maturity Securities, Debt Maturities, Yield 2.54% [1],[2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value 281,481 310,850
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]    
Held-to-maturity Securities, Debt Maturities, within One Year, Fair Value 6 [1]  
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Fair Value 73 [1]  
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value 51,759 [1]  
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value 1,018 [1]  
US Government Corporations and Agencies Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 545  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 0.67% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 802  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 2.17% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 1,635  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 4.24% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 2  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 4.57% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 2,984  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 3.03% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 547  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 821  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 1,729  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 2  
Debt Securities Carried at Fair Value 3,099  
Debt Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 23,029  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 0.99% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 48,451  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 2.69% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 129,297  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 3.14% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 83,106  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 2.83% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 283,883  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 2.80% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 23,081  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 48,761  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 129,167  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 80,472  
Debt Securities Carried at Fair Value 281,481  
Taxable Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 22,978  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 0.99% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 46,488  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 2.74% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 127,953  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 3.15% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 81,469  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 2.86% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 278,888  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 2.82% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 23,030  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 46,802  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 127,837  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 78,851  
Debt Securities Carried at Fair Value 276,520  
Agency Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 3  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 5.25% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 22,073  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 3.04% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 97,949  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 3.09% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 79,036  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 2.87% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 199,061  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 3.00% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 3  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 22,113  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 96,834  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 76,355  
Debt Securities Carried at Fair Value 195,305  
Collateralized Mortgage Obligations [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 125  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 0.81% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 9,068  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 1.24% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 21,946  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 3.41% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 1,040  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 2.78% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 32,179  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 2.77% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 124  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 8,997  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 22,846  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 1,040  
Debt Securities Carried at Fair Value 33,007  
Residential Mortgage Backed Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 561  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 3.43% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 4,231  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 4.34% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 2,547  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 4.00% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 474  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 5.27% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 7,813  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 4.22% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 580  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 4,326  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 2,582  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 538  
Debt Securities Carried at Fair Value 8,026  
Commercial Mortgage Backed Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 1,430  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 5.10% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 1,783  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 6.40% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 1,102  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 2.51% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 23  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 3.86% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 4,338  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 5.06% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 1,475  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 1,965  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 1,043  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 23  
Debt Securities Carried at Fair Value 4,506  
Foreign Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 17,451  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 0.60% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 2,231  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 3.47% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 149  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 3.05% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 8  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 19,839  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 0.94% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 17,436  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 2,265  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 155  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 8  
Debt Securities Carried at Fair Value 19,864  
Corporate Bond Securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 285  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 2.75% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 638  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 2.60% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 180  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 4.25% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 103  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 1.09% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 1,206  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 2.73% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 288  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 653  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 189  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 101  
Debt Securities Carried at Fair Value 1,231  
Other Debt Obligations [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 2,578  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 0.65% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 5,662  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 1.31% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 2,445  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 1.82% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 783  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 0.96% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 11,468  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 1.25% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 2,577  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 5,662  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 2,459  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 784  
Debt Securities Carried at Fair Value 11,482  
Tax-exempt securities [Member]
   
Debt Securities Carried at Fair Value, Debt Maturities, Amortized Cost Basis [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Amortized Cost Basis 51  
Debt Securities Carried at Fair Value Debt Maturities, Yield, Within One Year 2.96% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Amortized Cost Basis 1,963  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after One Through Five Years 1.42% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Amortized Cost Basis 1,344  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Five Through Ten Years 2.15% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Amortized Cost Basis 1,637  
Debt Securities Carried at Fair Value, Debt Maturities, Yield, after Ten Years 1.07% [2]  
Debt Securties Carried at Fair Value, Debt Maturities, Amortized Cost Basis 4,995  
Debt Securities Carried at Fair Value, Debt Maturities, Yield 1.62% [2]  
Debt Securities Carried at Fair Value, Debt Maturities, Fair Value [Abstract]    
Debt Securities Carried at Fair Value, Debt Maturities, Next Twelve Months, Fair Value 51  
Debt Securities Carried at Fair Value, Debt Maturities, Year Two Through Five, Fair Value 1,959  
Debt Securities Carried at Fair Value, Debt Maturities, Year Six Through Ten, Fair Value 1,330  
Debt Securities Carried at Fair Value, Debt Maturities, after Ten Years, Fair Value 1,621  
Debt Securities Carried at Fair Value $ 4,961  
[1] Substantially all U.S. agency MBS.
[2] Average yield is computed using the effective yield of each security at the end of the period, weighted based on the amortized cost of each security. The effective yield considers the contractual coupon, amortization of premiums and accretion of discounts, and excludes the effect of related hedging derivatives.