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
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 1,043 $ 1,101    
Carrying value $ 22,600 $ 24,205    
Allowance as a percentage of carrying value 4.62% 4.55%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 10,404 $ 10,329    
Carrying value $ 854,330 $ 849,155    
Allowance as a percentage of carrying value 1.22% 1.22%    
Purchased credit-impaired loans        
Valuation allowance $ 12,696   $ 14,213  
Valuation allowance as a percentage of carrying value 3.89% 4.82%    
Total        
Allowance for loan and lease losses $ 12,069 $ 12,234 13,676 $ 14,419
Carrying value $ 892,901 $ 890,045    
Allowance as a percentage of carrying value 1.35% 1.37%    
Loans and leases, measured at fair value $ 8,212 $ 6,938    
Consumer Real Estate        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 550 634    
Carrying value $ 18,975 $ 21,058    
Allowance as a percentage of carrying value 2.90% 3.01%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 2,284 $ 2,476    
Carrying value $ 223,265 $ 226,116    
Allowance as a percentage of carrying value 1.02% 1.10%    
Purchased credit-impaired loans        
Valuation allowance $ 3,456   5,250  
Valuation allowance as a percentage of carrying value 3.89% 4.82%    
Total        
Allowance for loan and lease losses $ 3,456 $ 3,914 5,250 5,935
Carrying value $ 258,211 $ 263,859    
Allowance as a percentage of carrying value 1.34% 1.48%    
Loans and leases, measured at fair value $ 1,900 $ 1,900    
Credit Card and Other Consumer        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 208 250    
Carrying value $ 722 $ 779    
Allowance as a percentage of carrying value 28.81% 32.09%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 3,094 $ 3,221    
Carrying value $ 188,443 $ 189,660    
Allowance as a percentage of carrying value 1.64% 1.70%    
Purchased credit-impaired loans        
Valuation allowance $ 3,302   3,929  
Total        
Allowance for loan and lease losses 3,302 $ 3,471 3,929 4,047
Carrying value $ 189,165 $ 190,439    
Allowance as a percentage of carrying value 1.75% 1.82%    
Commercial        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 285 $ 217    
Carrying value $ 2,903 $ 2,368    
Allowance as a percentage of carrying value 9.82% 9.16%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 5,026 $ 4,632    
Carrying value $ 442,622 $ 433,379    
Allowance as a percentage of carrying value 1.14% 1.07%    
Purchased credit-impaired loans        
Valuation allowance $ 5,938   5,034  
Total        
Allowance for loan and lease losses 5,311 $ 4,849 $ 4,497 $ 4,437
Carrying value $ 445,525 $ 435,747    
Allowance as a percentage of carrying value 1.19% 1.11%    
Loans and leases, measured at fair value $ 6,266 $ 5,067    
Commercial | United States        
Total        
Loans and leases, measured at fair value 2,600 2,300    
Small Business Commercial Loan | United States        
Total        
Allowance for loan and lease losses 35 35    
Purchased Credit - impaired        
Purchased credit-impaired loans        
Valuation allowance 622 804    
Carrying value gross of valuation allowance 15,971 16,685    
Purchased Credit - impaired | Consumer Real Estate        
Purchased credit-impaired loans        
Valuation allowance 622 804    
Carrying value gross of valuation allowance $ 15,971 $ 16,685