Quarterly report pursuant to Section 13 or 15(d)

Allowance for Credit Losses (Details)

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Allowance for Credit Losses (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance For Credit Losses, March 31 $ 32,862 $ 40,804
Allowance for Loan and Lease Losses [Roll Forward]    
Allowance for Loan and Lease Losses, January 1 33,783 41,885
Loans and Leases Charged Off (4,780) (6,926)
Recoveries of Loans and Leases Previously Charged Off 724 898
Net Charge-Offs (4,056) (6,028)
Provision for Loan and Lease Losses 2,457 3,916
Other 27 70
Allowance for Loan and Lease Losses, March 31 32,211 39,843
Reserve For Unfunded Lending Commitments, January 1 714 1,188
Provision for unfunded lending commitments (39) (102)
Other (24) [1] (125) [1]
Reserve For Unfunded Lending Commitments, March 31 651 961
Home Loans [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance For Credit Losses, March 31 20,973 20,097
Allowance for Loan and Lease Losses [Roll Forward]    
Allowance for Loan and Lease Losses, January 1 21,079 19,252
Loans and Leases Charged Off (2,007) (2,289)
Recoveries of Loans and Leases Previously Charged Off 136 185
Net Charge-Offs (1,871) (2,104)
Provision for Loan and Lease Losses 1,765 2,948
Other    1
Allowance for Loan and Lease Losses, March 31 20,973 20,097
Credit Card and Other Consumer [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance For Credit Losses, March 31 7,664 13,271
Allowance for Loan and Lease Losses [Roll Forward]    
Allowance for Loan and Lease Losses, January 1 8,569 15,463
Loans and Leases Charged Off (2,242) (3,731)
Recoveries of Loans and Leases Previously Charged Off 426 490
Net Charge-Offs (1,816) (3,241)
Provision for Loan and Lease Losses 879 979
Other 32 70
Allowance for Loan and Lease Losses, March 31 7,664 13,271
Commercial [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance For Credit Losses, March 31 4,225 7,436
Allowance for Loan and Lease Losses [Roll Forward]    
Allowance for Loan and Lease Losses, January 1 4,135 7,170
Loans and Leases Charged Off (531) (906)
Recoveries of Loans and Leases Previously Charged Off 162 223
Net Charge-Offs (369) (683)
Provision for Loan and Lease Losses (187) (11)
Other (5) (1)
Allowance for Loan and Lease Losses, March 31 3,574 6,475
Reserve For Unfunded Lending Commitments, January 1 714 1,188
Provision for unfunded lending commitments (39) (102)
Other (24) [1] (125) [1]
Reserve For Unfunded Lending Commitments, March 31 $ 651 $ 961
[1] Represents primarily accretion of the Merrill Lynch purchase accounting adjustment and the impact of funding previously unfunded positions.