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 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Home Loans [Member]
Sep. 30, 2012
Home Loans [Member]
Sep. 30, 2013
Home Loans [Member]
Sep. 30, 2012
Home Loans [Member]
Sep. 30, 2013
Credit Card and Other Consumer [Member]
Sep. 30, 2012
Credit Card and Other Consumer [Member]
Sep. 30, 2013
Credit Card and Other Consumer [Member]
Sep. 30, 2012
Credit Card and Other Consumer [Member]
Sep. 30, 2013
Commercial [Member]
Sep. 30, 2012
Commercial [Member]
Sep. 30, 2013
Commercial [Member]
Sep. 30, 2012
Commercial [Member]
Sep. 30, 2013
Purchased Credit Impaired Loans [Member]
Sep. 30, 2012
Purchased Credit Impaired Loans [Member]
Sep. 30, 2013
Purchased Credit Impaired Loans [Member]
Sep. 30, 2012
Purchased Credit Impaired Loans [Member]
Sep. 30, 2013
Purchased Credit Impaired Loans [Member]
Home Loans [Member]
Dec. 31, 2012
Purchased Credit Impaired Loans [Member]
Home Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]                                            
Allowance for Loan and Lease Losses, Loans Acquired                                 $ 248 $ 166 $ 707 $ (327)    
Allowance for Loan and Lease Losses [Roll Forward]                                            
Allowance for Loan and Lease Losses, beginning balance 21,235 30,288 24,179 33,783 12,396 19,964 14,933 21,079 5,671 7,024 6,140 8,569 3,168 3,300 3,106 4,135     5,536   3,234 5,536
Loans and Leases Charged Off (2,329) (4,693) (8,141) (13,884) (766) (2,480) (2,895) (6,256) (1,296) (1,721) (4,338) (5,983) (267) (492) (908) (1,645)            
Recoveries of Loans and Leases Previously Charged Off 642 571 1,826 2,080 243 137 548 400 292 294 941 1,131 107 140 337 549            
Net Charge-Offs (1,687) (4,122) (6,315) (11,804) (523) (2,343) (2,347) (5,856) (1,004) (1,427) (3,397) (4,852) (160) (352) (571) (1,096)            
Write-offs of PCI loans (443) (1,705) (1,595)   (443) (1,705) (1,595)   0 0 0   0 0 0   1,700          
Provision for Loan and Lease Losses 291 1,810 3,242 6,107 (920) 617 (409) 3,061 730 960 2,694 2,893 481 233 957 153            
Other 36 [1] (38) [1] (79) [1] 148 [1] 3 [1] 1 [1] (69) [1] 45 [1] 33 [1] (36) [1] (7) [1] 89 [1] 0 [1] (3) [1] (3) [1] 14 [1]            
Allowance for Loan and Lease Losses, ending balance 19,432 26,233 19,432 26,233 10,513 16,534 10,513 16,534 5,430 6,521 5,430 6,521 3,489 3,178 3,489 3,178 3,234   3,234   3,234 5,536
Reserve For Unfunded Lending Commitments, beginning balance 474 574 513 714    0    0    0    0 474 574 513 714            
Provision for unfunded lending commitments 5 (36) (22) (142)    0    0    0    0 5 (36) (22) (142)            
Other 1 [2] (20) [2] (11) [2] (54) [2]    [2] 0 [2]    [2] 0 [2]    [2] 0 [2]    [2] 0 [2] 1 [2] (20) [2] (11) [2] (54) [2]            
Reserve For Unfunded Lending Commitments, ending balance 480 518 480 518    0    0    0    0 480 518 480 518            
Allowance For Credit Losses, September 30 $ 19,912 $ 26,751 $ 19,912 $ 26,751 $ 10,513 $ 16,534 $ 10,513 $ 16,534 $ 5,430 $ 6,521 $ 5,430 $ 6,521 $ 3,969 $ 3,696 $ 3,969 $ 3,696            
[1] Primarily represents the net impact of portfolio sales, consolidations and deconsolidations, and foreign currency translation adjustments.
[2] Primarily represents accretion of the Merrill Lynch purchase accounting adjustment.