Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Home Loans Impaired Loans (Details)

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Outstanding Loans and Leases - Home Loans Impaired Loans (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2013
Home Loans [Member]
Mar. 31, 2012
Home Loans [Member]
Dec. 31, 2012
Home Loans [Member]
Mar. 31, 2013
Home Loans [Member]
Residential Mortgage [Member]
Mar. 31, 2012
Home Loans [Member]
Residential Mortgage [Member]
Dec. 31, 2012
Home Loans [Member]
Residential Mortgage [Member]
Mar. 31, 2013
Home Loans [Member]
Home Equity [Member]
Mar. 31, 2012
Home Loans [Member]
Home Equity [Member]
Dec. 31, 2012
Home Loans [Member]
Home Equity [Member]
Mar. 31, 2013
Additional Troubled Debt Restructurings Recognized [Member]
Dec. 31, 2012
Additional Troubled Debt Restructurings Recognized [Member]
Dec. 31, 2011
Additional Troubled Debt Restructurings Recognized [Member]
Mar. 31, 2013
Fully Insured Loans [Member]
Mar. 31, 2013
Fully Insured Loans [Member]
Home Loans [Member]
Mar. 31, 2013
Fully Insured Loans [Member]
Home Loans [Member]
Residential Mortgage [Member]
Mar. 31, 2013
Fully Insured Loans [Member]
Home Loans [Member]
Home Equity [Member]
Mar. 31, 2013
Fully Insured Loans [Member]
Mar. 31, 2013
Class of Financing Receivable [Member]
Home Loans [Member]
Residential Mortgage [Member]
Mar. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Residential Mortgage [Member]
Dec. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Residential Mortgage [Member]
Mar. 31, 2013
Class of Financing Receivable [Member]
Home Loans [Member]
Home Equity [Member]
Mar. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Home Equity [Member]
Dec. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Home Equity [Member]
Mar. 31, 2013
Class of Financing Receivable [Member]
Home Loans [Member]
Residential Mortgage [Member]
Mar. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Residential Mortgage [Member]
Dec. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Residential Mortgage [Member]
Mar. 31, 2013
Class of Financing Receivable [Member]
Home Loans [Member]
Home Equity [Member]
Mar. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Home Equity [Member]
Dec. 31, 2012
Class of Financing Receivable [Member]
Home Loans [Member]
Home Equity [Member]
Financing Receivable, Impaired [Line Items]                                                          
Troubled Debt Restructurings, Non-performing With No Change in Repayment Terms At Time of Discharge                         $ 2,000                                
Troubled Debt Restructurings Carrying Value 4,997 [1] 1,492 [1]   4,843 [1] 1,382 [1]   154 [1] 110 [1]         4,100 677 [2] 602 [2] 75 [2] 2,100                        
Troubled Debt Restructurings Carrying Value Loans Discharged, Percent                   6.00% 38.00%                                    
Toubled Debt Restructuring Carrying Value, Cumulative to Date Percentage                       56.00%                                  
Real Estate Acquired Through Foreclosure 620   650                                                    
Unpaid Principal Balance       37,828   34,449 3,964   3,880                 22,130   20,226 2,796   2,624 15,698   14,223 1,168   1,256
Carrying Value       31,462   28,125 2,119   2,125                 16,821   14,967 1,164   1,103 14,641   13,158 955   1,022
Related Allowance       1,425   1,252 370   448                             1,425   1,252 370   448
Average Carrying Value       29,794 19,878   2,122 1,761                   15,894 8,704   1,134 506   13,900 11,174   988 1,255  
Interest Income Recognized       $ 298 [3] $ 175 [3]   $ 28 [3] $ 18 [3]                   $ 144 [3] $ 75 [3]   $ 17 [3] $ 9 [3]   $ 154 [3] $ 100 [3]   $ 11 [3] $ 9 [3]  
[1] TDRs entered into during the three months ended March 31, 2013 include residential mortgage modifications with principal forgiveness of $219 million. For the three months ended March 31, 2012, the principal forgiveness amount was not significant.
[2] Includes loans discharged in Chapter 7 bankruptcy with no change in repayment terms that are classified as TDRs in accordance with regulatory guidance issued in the third quarter of 2012. For the three months ended March 31, 2013, residential mortgage loans of $371 million, or 55 percent of loans discharged in Chapter 7 bankruptcy were current or less than 60 days past due.
[3] Interest income recognized includes interest accrued and collected on the outstanding balances of accruing impaired loans as well as interest cash collections on nonaccruing impaired loans for which the principal is considered collectible.