Annual report pursuant to Section 13 and 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
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 663 $ 818    
Carrying value $ 15,451 $ 19,220    
Allowance as a percentage of carrying value 4.29% 4.26%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 9,441 $ 10,243    
Carrying value $ 904,871 $ 875,854    
Allowance as a percentage of carrying value 1.04% 1.17%    
Purchased credit-impaired loans        
Valuation allowance $ 11,170 $ 11,999 $ 12,880  
Valuation allowance as a percentage of carrying value 2.70% 3.05%    
Less: Assets of business held for sale        
Less: Allowance included in assets of business held for sale   $ (243)    
Carrying value   (9,214)    
Total        
Allowance for loan and lease losses $ 10,393 11,237 12,234 $ 14,419
Carrying value $ 931,039 $ 899,598    
Allowance as a percentage of carrying value 1.12% 1.25%    
Loans and leases $ 936,749 $ 906,683    
Estimate of Fair Value Measurement        
Total        
Loans and leases 5,710 7,085    
Small Business Commercial Loan | United States        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 27 27    
Purchased Credit-impaired        
Purchased credit-impaired loans        
Valuation allowance 289 419    
Carrying value gross of valuation allowance 10,717 13,738    
Total        
Loans and leases 10,717      
Consumer real estate        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 348 356    
Carrying value $ 12,554 $ 15,408    
Allowance as a percentage of carrying value 2.77% 2.31%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 1,083 $ 1,975    
Carrying value $ 238,284 $ 229,094    
Allowance as a percentage of carrying value 0.45% 0.86%    
Purchased credit-impaired loans        
Valuation allowance $ 1,720 $ 2,750 3,914  
Valuation allowance as a percentage of carrying value 2.70% 3.05%    
Total        
Allowance for loan and lease losses $ 1,720 $ 2,750 3,914 5,935
Carrying value $ 261,555 $ 258,240    
Allowance as a percentage of carrying value 0.66% 1.06%    
Consumer real estate | Estimate of Fair Value Measurement        
Total        
Loans and leases $ 928 $ 1,100    
Consumer real estate | Purchased Credit-impaired        
Purchased credit-impaired loans        
Valuation allowance 289 419    
Carrying value gross of valuation allowance 10,717 13,738    
Credit card and other consumer        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 125 189    
Carrying value $ 490 $ 610    
Allowance as a percentage of carrying value 25.51% 30.98%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 3,538 $ 3,283    
Carrying value $ 192,303 $ 197,470    
Allowance as a percentage of carrying value 1.84% 1.66%    
Purchased credit-impaired loans        
Valuation allowance $ 3,663 $ 3,229 3,471  
Less: Assets of business held for sale        
Less: Allowance included in assets of business held for sale   (243)    
Carrying value   (9,214)    
Total        
Allowance for loan and lease losses 3,663 3,229 3,471 4,047
Carrying value $ 192,793 $ 188,866    
Allowance as a percentage of carrying value 1.90% 1.71%    
Credit card and other consumer | Credit Card Receivable | United States        
Total        
Loans and leases $ 96,285 $ 92,278    
Credit card and other consumer | Credit Card Receivable | Non United States        
Total        
Related allowance, including loans held for sale   61    
Carrying value   182    
Commercial        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 190 273    
Carrying value $ 2,407 $ 3,202    
Allowance as a percentage of carrying value 7.89% 8.53%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 4,820 $ 4,985    
Carrying value $ 474,284 $ 449,290    
Allowance as a percentage of carrying value 1.02% 1.11%    
Purchased credit-impaired loans        
Valuation allowance $ 5,787 $ 6,020 5,495  
Total        
Allowance for loan and lease losses 5,010 5,258 $ 4,849 $ 4,437
Carrying value $ 476,691 $ 452,492    
Allowance as a percentage of carrying value 1.05% 1.16%    
Loans and leases $ 481,473 $ 458,526    
Commercial | Estimate of Fair Value Measurement        
Total        
Loans and leases 4,782 6,034    
Commercial | United States        
Total        
Loans and leases 284,836 270,372    
Commercial | Non United States        
Total        
Loans and leases $ 97,792 $ 89,397