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, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 608 $ 663    
Carrying value $ 11,555 $ 15,451    
Allowance as a percentage of carrying value 5.26% 4.29%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 8,902 $ 9,441    
Carrying value $ 926,346 $ 904,871    
Allowance as a percentage of carrying value 0.96% 1.04%    
Purchased credit-impaired loans        
Valuation allowance $ 10,398 $ 11,170 $ 11,999  
Total        
Allowance for loan and lease losses 9,601 10,393 11,237 $ 12,234
Carrying value $ 942,546 $ 931,039    
Allowance as a percentage of carrying value 1.02% 1.12%    
Loans and leases $ 946,895 $ 936,749    
Estimate of Fair Value Measurement        
Total        
Loans and leases 4,349 5,710    
Purchased Credit-impaired        
Purchased credit-impaired loans        
Valuation allowance 91 289    
Carrying value gross of valuation allowance $ 4,645 $ 10,717    
Valuation allowance as a percentage of carrying value 1.96% 2.70%    
Total        
Loans and leases $ 4,645 $ 10,717    
Consumer real estate        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses 258 348    
Carrying value $ 8,556 $ 12,554    
Allowance as a percentage of carrying value 3.02% 2.77%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 579 $ 1,083    
Carrying value $ 243,642 $ 238,284    
Allowance as a percentage of carrying value 0.24% 0.45%    
Purchased credit-impaired loans        
Valuation allowance $ 928 $ 1,720 2,750  
Total        
Allowance for loan and lease losses 928 1,720 2,750 3,914
Carrying value $ 256,843 $ 261,555    
Allowance as a percentage of carrying value 0.36% 0.66%    
Consumer real estate | Estimate of Fair Value Measurement        
Total        
Loans and leases $ 682 $ 928    
Consumer real estate | Purchased Credit-impaired        
Purchased credit-impaired loans        
Valuation allowance 91 289    
Carrying value gross of valuation allowance $ 4,645 $ 10,717    
Valuation allowance as a percentage of carrying value 1.96% 2.70%    
Credit card and other consumer        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 154 $ 125    
Carrying value $ 566 $ 490    
Allowance as a percentage of carrying value 27.21% 25.51%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 3,720 $ 3,538    
Carrying value $ 189,140 $ 192,303    
Allowance as a percentage of carrying value 1.97% 1.84%    
Purchased credit-impaired loans        
Valuation allowance $ 3,874 $ 3,663 3,229  
Total        
Allowance for loan and lease losses 3,874 3,663 3,229 3,471
Carrying value $ 189,706 $ 192,793    
Allowance as a percentage of carrying value 2.04% 1.90%    
Commercial        
Impaired loans and troubled debt restructurings        
Allowance for loan and lease losses $ 196 $ 190    
Carrying value $ 2,433 $ 2,407    
Allowance as a percentage of carrying value 8.06% 7.89%    
Loans collectively evaluated for impairment        
Allowance for loan and lease losses $ 4,603 $ 4,820    
Carrying value $ 493,564 $ 474,284    
Allowance as a percentage of carrying value 0.93% 1.02%    
Purchased credit-impaired loans        
Valuation allowance $ 5,596 $ 5,787 6,020  
Total        
Allowance for loan and lease losses 4,799 5,010 $ 5,258 $ 4,849
Carrying value $ 495,997 $ 476,691    
Allowance as a percentage of carrying value 0.97% 1.05%    
Loans and leases $ 499,664 $ 481,473    
Commercial | Estimate of Fair Value Measurement        
Total        
Loans and leases $ 3,667 $ 4,782