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, 2017
Dec. 31, 2016
Mar. 31, 2016
Impaired loans and troubled debt restructurings      
Allowance for loan and lease losses $ 879 $ 818  
Carrying value $ 18,332 $ 19,220  
Allowance as a percentage of carrying value 4.79% 4.26%  
Loans collectively evaluated for impairment      
Allowance for loan and lease losses $ 10,021 $ 10,243  
Carrying value $ 876,660 $ 875,854  
Allowance as a percentage of carrying value 1.14% 1.17%  
Purchased credit-impaired loans      
Valuation allowance $ 11,869   $ 12,696
Valuation allowance as a percentage of carrying value 3.43% 3.05%  
Less: Assets of business held for sale      
Less: Allowance included in assets of business held for sale $ (242) $ (243)  
Carrying value (9,505) (9,214)  
Total      
Carrying value $ 898,714 $ 899,598  
Allowance as a percentage of carrying value 1.24% 1.25%  
Loans and leases $ 906,242 $ 906,683  
Estimate of Fair Value Measurement      
Total      
Loans and leases 7,528 7,085  
Small Business Commercial Loan | United States      
Impaired loans and troubled debt restructurings      
Allowance for loan and lease losses 28 27  
Purchased Credit-impaired      
Purchased credit-impaired loans      
Valuation allowance 454 419  
Carrying value gross of valuation allowance 13,227 13,738  
Consumer real estate      
Impaired loans and troubled debt restructurings      
Allowance for loan and lease losses 410 356  
Carrying value $ 14,722 $ 15,408  
Allowance as a percentage of carrying value 2.78% 2.31%  
Loans collectively evaluated for impairment      
Allowance for loan and lease losses $ 1,701 $ 1,975  
Carrying value $ 229,809 $ 229,094  
Allowance as a percentage of carrying value 0.74% 0.86%  
Purchased credit-impaired loans      
Valuation allowance $ 2,565   3,456
Valuation allowance as a percentage of carrying value 3.43% 3.05%  
Total      
Carrying value $ 257,758 $ 258,240  
Allowance as a percentage of carrying value 1.00% 1.06%  
Consumer real estate | Estimate of Fair Value Measurement      
Total      
Loans and leases $ 1,032 $ 1,051  
Consumer real estate | Purchased Credit-impaired      
Purchased credit-impaired loans      
Valuation allowance 454 419  
Carrying value gross of valuation allowance 13,227 13,738  
Credit card and other consumer      
Impaired loans and troubled debt restructurings      
Allowance for loan and lease losses 195 189  
Carrying value $ 594 $ 610  
Allowance as a percentage of carrying value 32.83% 30.98%  
Loans collectively evaluated for impairment      
Allowance for loan and lease losses $ 3,376 $ 3,283  
Carrying value $ 192,796 $ 197,470  
Allowance as a percentage of carrying value 1.75% 1.66%  
Purchased credit-impaired loans      
Valuation allowance $ 3,329   3,302
Less: Assets of business held for sale      
Less: Allowance included in assets of business held for sale (242) $ (243)  
Carrying value (9,505) (9,214)  
Total      
Carrying value $ 183,885 $ 188,866  
Allowance as a percentage of carrying value 1.81% 1.71%  
Credit card and other consumer | Credit Card Receivable | United States      
Total      
Loans and leases $ 88,552 $ 92,278  
Related Allowance 130 128  
Credit card and other consumer | Credit Card Receivable | Non United States      
Total      
Related allowance, including loans held for sale 65 61  
Carrying value 177 182  
Commercial      
Impaired loans and troubled debt restructurings      
Allowance for loan and lease losses 274 273  
Carrying value $ 3,016 $ 3,202  
Allowance as a percentage of carrying value 9.08% 8.53%  
Loans collectively evaluated for impairment      
Allowance for loan and lease losses $ 4,944 $ 4,985  
Carrying value $ 454,055 $ 449,290  
Allowance as a percentage of carrying value 1.09% 1.11%  
Purchased credit-impaired loans      
Valuation allowance $ 5,975   $ 5,938
Total      
Carrying value $ 457,071 $ 452,492  
Allowance as a percentage of carrying value 1.14% 1.16%  
Loans and leases $ 463,567 $ 458,526  
Commercial | Estimate of Fair Value Measurement      
Total      
Loans and leases 6,496 6,034  
Commercial | United States      
Total      
Loans and leases 274,868 270,372  
Related Allowance 131 132  
Commercial | Non United States      
Total      
Loans and leases 89,179 89,397  
Related Allowance $ 103 $ 104