Annual report pursuant to Section 13 and 15(d)

Securities - Expected Maturity (Details)

v2.4.0.6
Securities - Expected Maturity (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Amortized Cost $ 279,860 $ 271,172
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 8,616 [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 40,836 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after Five Through Ten Years 2.40% [1],[2]  
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount 23 [1]  
Held-to-maturity Securities, Debt Maturities, Yield, after Ten Years 4.40% [1],[2]  
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount 49,481 [1]  
Held-to-maturity Securities, Debt Maturities, Yield 2.40% [1],[2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
AFS Debt Securities 286,906 276,151
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 8,790 [1]  
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value 41,451 [1]  
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value 23 [1]  
Held-to-maturity Securities, Debt Maturities, Fair Value 50,270 [1]  
United States Treasury And Agency Securities Member
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 548  
Available For Sale Securities Debt Maturities, Yield, Within One Year 0.57% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 855  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 2.12% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 1,884  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 5.30% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 20,945  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.80% [2]  
Available-for-sale Securities, Amortized Cost 24,232  
Available-for-sale Securities, Debt Maturities, Yield 3.00% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 549  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 883  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 2,072  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 20,968  
AFS Debt Securities 24,472  
Debt Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 8,878  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.84% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 90,230  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 2.88% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 156,506  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.95% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 24,246  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.72% [2]  
Available-for-sale Securities, Amortized Cost 279,860  
Available-for-sale Securities, Debt Maturities, Yield 2.84% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 8,902  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 92,098  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 161,619  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 24,287  
AFS Debt Securities 286,906  
Agency Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 7  
Available For Sale Securities Debt Maturities, Yield, Within One Year 4.70% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 59,880  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 3.10% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 123,075  
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 285  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.60% [2]  
Available-for-sale Securities, Amortized Cost 183,247 138,073
Available-for-sale Securities, Debt Maturities, Yield 2.90% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 7  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 61,234  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 126,619  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 289  
AFS Debt Securities 188,149 142,563
Collateralized Mortgage Obligations [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 11  
Available For Sale Securities Debt Maturities, Yield, Within One Year 6.31% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 12,876  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.20% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 23,427  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 3.10% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 15  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 1.10% [2]  
Available-for-sale Securities, Amortized Cost 36,329 44,392
Available-for-sale Securities, Debt Maturities, Yield 2.40% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [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 12,827  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 24,684  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 16  
AFS Debt Securities 37,538 44,999
Residential Mortgage Backed Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 750  
Available For Sale Securities Debt Maturities, Yield, Within One Year 4.50% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 5,112  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 4.30% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 2,767  
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 602  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 6.70% [2]  
Available-for-sale Securities, Amortized Cost 9,231 [3] 14,948 [3]
Available-for-sale Securities, Debt Maturities, Yield 4.40% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 749  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 5,239  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 2,841  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 665  
AFS Debt Securities 9,494 [3] 14,767 [3]
Commercial Mortgage Backed Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 456  
Available For Sale Securities Debt Maturities, Yield, Within One Year 5.70% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 3,080  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 5.90% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 22  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 3.70% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 18  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 4.03% [2]  
Available-for-sale Securities, Amortized Cost 3,576 4,894
Available-for-sale Securities, Debt Maturities, Yield 5.90% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 477  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 3,405  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 24  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 18  
AFS Debt Securities 3,924 5,522
Foreign Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 4,247  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.46% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 1,169  
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 158  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.20% [2]  
Available-for-sale Securities, Amortized Cost 5,574  
Available-for-sale Securities, Debt Maturities, Yield 2.65% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 4,244  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 1,211  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 163  
AFS Debt Securities 5,618  
Corporate Bond Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 315  
Available For Sale Securities Debt Maturities, Yield, Within One Year 2.40% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 808  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 2.80% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 185  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 4.52% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 107  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 0.90% [2]  
Available-for-sale Securities, Amortized Cost 1,415 2,993
Available-for-sale Securities, Debt Maturities, Yield 2.92% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 320  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 826  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 207  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 97  
AFS Debt Securities 1,450 3,035
Other taxable securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 2,501  
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 4,926  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.10% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 3,803  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 1.82% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 859  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 1.10% [2]  
Available-for-sale Securities, Amortized Cost 12,089 12,889
Available-for-sale Securities, Debt Maturities, Yield 1.37% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 2,502  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 4,947  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 3,825  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 854  
AFS Debt Securities 12,128 12,878
Taxable Securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 8,835  
Available For Sale Securities Debt Maturities, Yield, Within One Year 1.84% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 88,706  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 2.91% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 155,321  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.95% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 22,831  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 2.83% [2]  
Available-for-sale Securities, Amortized Cost 275,693 266,494
Available-for-sale Securities, Debt Maturities, Yield 2.86% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 8,859  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 90,572  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 160,435  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 22,907  
AFS Debt Securities 282,773 271,548
Tax-exempt securities [Member]
    
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis 43  
Available For Sale Securities Debt Maturities, Yield, Within One Year 2.63% [2]  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis 1,524  
Available-for-sale Securities, Debt Maturities, Yield, after One Through Five Years 1.40% [2]  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis 1,185  
Available-for-sale Securities, Debt Maturities, Yield, after Five Through Ten Years 2.02% [2]  
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis 1,415  
Available-for-sale Securities, Debt Maturities, Yield, after Ten Years 1.10% [2]  
Available-for-sale Securities, Amortized Cost 4,167 4,678
Available-for-sale Securities, Debt Maturities, Yield 1.68% [2]  
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]    
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value 43  
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value 1,526  
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value 1,184  
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 1,380  
AFS Debt Securities $ 4,133 $ 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 December 31, 2012 and 2011, includes approximately 91 percent and 89 percent prime, six percent and nine percent Alt-A, and three percent and two percent subprime.