Quarterly report pursuant to Section 13 or 15(d)

Allowance for Credit Losses - Allowance and Carrying Value by Portfolio Segment (Details)

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Allowance for Credit Losses - Allowance and Carrying Value by Portfolio Segment (Details) - USD ($)
$ in Millions
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Impaired loans and troubled debt restructurings            
Allowance for loan and lease losses $ 1,104   $ 1,225      
Carrying value $ 25,606   $ 28,967      
Allowance as a percentage of carrying value 4.31%   4.23%      
Loans collectively evaluated for impairment            
Allowance for loan and lease losses $ 10,667   $ 11,542      
Carrying value $ 837,459   $ 822,974      
Allowance as a percentage of carrying value 1.27%   1.40%      
Purchased credit-impaired loans            
Valuation allowance $ 13,318     $ 15,635    
Valuation allowance as a percentage of carrying value 5.08%   7.95%      
Total            
Allowance for loan and lease losses $ 12,657 $ 13,068 $ 14,419 15,106 $ 15,811 $ 17,428
Carrying value $ 880,511   $ 872,710      
Allowance as a percentage of carrying value 1.44%   1.65%      
Loans and leases, measured at fair value $ 7,178   $ 8,681      
Consumer Real Estate            
Impaired loans and troubled debt restructurings            
Allowance for loan and lease losses 664   727      
Carrying value $ 22,541   $ 25,628      
Allowance as a percentage of carrying value 2.95%   2.84%      
Loans collectively evaluated for impairment            
Allowance for loan and lease losses $ 2,850   $ 3,556      
Carrying value $ 225,982   $ 255,525      
Allowance as a percentage of carrying value 1.26%   1.39%      
Purchased credit-impaired loans            
Valuation allowance $ 4,400     6,476    
Valuation allowance as a percentage of carrying value 5.08%   7.95%      
Total            
Allowance for loan and lease losses $ 4,400 4,741 $ 5,935 6,476 6,908 8,518
Carrying value $ 265,969   $ 301,922      
Allowance as a percentage of carrying value 1.65%   1.97%      
Loans and leases, measured at fair value $ 1,900   $ 2,100      
Credit Card and Other Consumer            
Impaired loans and troubled debt restructurings            
Allowance for loan and lease losses 286   339      
Carrying value $ 850   $ 1,141      
Allowance as a percentage of carrying value 33.65%   29.71%      
Loans collectively evaluated for impairment            
Allowance for loan and lease losses $ 3,266   $ 3,708      
Carrying value $ 186,881   $ 183,430      
Allowance as a percentage of carrying value 1.75%   2.02%      
Purchased credit-impaired loans            
Valuation allowance $ 3,552     4,198    
Total            
Allowance for loan and lease losses 3,552 3,702 $ 4,047 4,198 4,417 4,905
Carrying value $ 187,731   $ 184,571      
Allowance as a percentage of carrying value 1.89%   2.19%      
Commercial            
Impaired loans and troubled debt restructurings            
Allowance for loan and lease losses $ 154   $ 159      
Carrying value $ 2,215   $ 2,198      
Allowance as a percentage of carrying value 6.95%   7.23%      
Loans collectively evaluated for impairment            
Allowance for loan and lease losses $ 4,551   $ 4,278      
Carrying value $ 424,596   $ 384,019      
Allowance as a percentage of carrying value 1.07%   1.11%      
Purchased credit-impaired loans            
Valuation allowance $ 5,366     4,961    
Total            
Allowance for loan and lease losses 4,705 $ 4,625 $ 4,437 $ 4,432 $ 4,486 $ 4,005
Carrying value $ 426,811   $ 386,217      
Allowance as a percentage of carrying value 1.10%   1.15%      
Loans and leases, measured at fair value $ 5,234   $ 6,604      
Commercial | United States            
Total            
Loans and leases, measured at fair value 2,200   1,900      
Small Business Commercial Loan | United States            
Total            
Allowance for loan and lease losses 35   35      
Purchased Credit - impaired            
Purchased credit-impaired loans            
Valuation allowance 886   1,700      
Carrying value gross of valuation allowance 17,446   20,769      
Purchased Credit - impaired | Consumer Real Estate            
Purchased credit-impaired loans            
Valuation allowance 886   1,652      
Carrying value gross of valuation allowance $ 17,446   $ 20,769