Quarterly report pursuant to Section 13 or 15(d)

Securities - Expected Maturity (Details)

v2.4.0.6
Securities - Expected Maturity (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
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 8,853 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after One Through Five Years 2.30% [1],[2]  
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount 27,103 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after Five Through Ten Years 2.70% [1],[2]  
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount 3,936 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after Ten Years 2.90% [1],[2]  
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount 39,898 [1]  
Held-to-maturity Securities, Debt Maturities, Yield 2.60% [1],[2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
AFS Debt Securities 305,949 276,151
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 9,102 [1]  
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value 28,054 [1]  
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value 3,966 [1]  
Held-to-maturity Securities, Debt Maturities, Fair Value 41,128 [1]  
Debt Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 9,365  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.21% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 99,866  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 2.78% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 154,130  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.89% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 33,472  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.56% [2]  
Available-for-sale Securities, Amortized Cost 296,833  
Available-for-sale Securities, Debt Maturities, Yield 2.76% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 9,379  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 102,600  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 160,556  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 33,414  
AFS Debt Securities 305,949  
Taxable Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 9,220  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.22% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 98,922  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 2.79% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 153,298  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.90% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 32,553  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.62% [2]  
Available-for-sale Securities, Amortized Cost 293,993 266,494
Available-for-sale Securities, Debt Maturities, Yield 2.77% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 9,231  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 101,659  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 159,721  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 32,531  
AFS Debt Securities 303,142 271,548
United States Treasury And Agency Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 539  
Available For Sale Securities Debt Maturities, Yield, Within One Year 0.12% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 619  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.00% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 2,094  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 5.00% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 21,542  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.60% [2]  
Available-for-sale Securities, Amortized Cost 24,794  
Available-for-sale Securities, Debt Maturities, Yield 2.80% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 540  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 645  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 2,303  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 21,307  
AFS Debt Securities 24,795  
Agency Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 11  
Available For Sale Securities Debt Maturities, Yield, Within One Year 4.60% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 66,676  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 2.90% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 121,332  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.90% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 8,957  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.70% [2]  
Available-for-sale Securities, Amortized Cost 196,976 138,073
Available-for-sale Securities, Debt Maturities, Yield 2.90% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 11  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 68,754  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 126,145  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 9,133  
AFS Debt Securities 204,043 142,563
Collateralized Mortgage Obligations [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 100  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.10% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 14,549  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.30% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 24,197  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.70% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 17  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 1.00% [2]  
Available-for-sale Securities, Amortized Cost 38,863 44,392
Available-for-sale Securities, Debt Maturities, Yield 2.20% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 101  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 14,549  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 25,480  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 17  
AFS Debt Securities 40,147 44,999
Residential Mortgage Backed Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 909  
Available For Sale Securities Debt Maturities, Yield, Within One Year 4.30% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 5,351  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 4.20% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 2,883  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 4.00% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 629  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 5.40% [2]  
Available-for-sale Securities, Amortized Cost 9,772 [3] 14,948 [3]
Available-for-sale Securities, Debt Maturities, Yield 4.20% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 909  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 5,476  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 2,938  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 679  
AFS Debt Securities 10,002 [3] 14,767 [3]
Commercial Mortgage Backed Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 270  
Available For Sale Securities Debt Maturities, Yield, Within One Year 5.60% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 3,429  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 5.80% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 15  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 4.20% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 19  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 5.20% [2]  
Available-for-sale Securities, Amortized Cost 3,733 4,894
Available-for-sale Securities, Debt Maturities, Yield 4.10% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 280  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 3,809  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 18  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 20  
AFS Debt Securities 4,127 5,522
Foreign Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 3,922  
Available For Sale Securities Debt Maturities, Yield, Within One Year 0.77% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 1,626  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 6.10% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 161  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.10% [2]  
Available-for-sale Securities, Amortized Cost 5,709  
Available-for-sale Securities, Debt Maturities, Yield 2.07% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 3,914  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 1,669  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 165  
AFS Debt Securities 5,748  
Corporate Bond Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 545  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.80% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 1,028  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.80% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 327  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 4.80% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 118  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 0.90% [2]  
Available-for-sale Securities, Amortized Cost 2,018 2,993
Available-for-sale Securities, Debt Maturities, Yield 1.80% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 548  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 1,058  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 369  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 108  
AFS Debt Securities 2,083 3,035
Other Debt Obligations [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 2,924  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.10% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 5,644  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.60% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 2,289  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 1.20% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 1,271  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 1.20% [2]  
Available-for-sale Securities, Amortized Cost 12,128 12,889
Available-for-sale Securities, Debt Maturities, Yield 1.40% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 2,928  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 5,699  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 2,303  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 1,267  
AFS Debt Securities 12,197 12,878
Tax-exempt securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 145  
Available For Sale Securities Debt Maturities, Yield, Within One Year 0.50% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 944  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.60% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 832  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.50% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 919  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 0.30% [2]  
Available-for-sale Securities, Amortized Cost 2,840 4,678
Available-for-sale Securities, Debt Maturities, Yield 1.39% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 148  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 941  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 835  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 883  
AFS Debt Securities $ 2,807 $ 4,603
[1] Substantially all U.S. agency mortgage-backed securities.
[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.
[3] At September 30, 2012, includes approximately 91 percent prime, six percent Alt-A, and three percent subprime. At December 31, 2011, includes approximately 89 percent prime, nine percent Alt-A and two percent subprime.