Annual report pursuant to Section 13 and 15(d)

Allowance for Credit Losses - Allowance by Portfolio Segment (Details)

v3.6.0.2
Allowance for Credit Losses - Allowance by Portfolio Segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, January 1 $ 12,234 $ 14,419 $ 17,428  
Loans and leases charged off (5,448) (6,105) (7,026)  
Recoveries of loans and leases previously charged off 1,627 1,767 2,643  
Net charge-offs (3,821) (4,338) (4,383)  
Provision for loan and lease losses 3,581 3,043 2,231  
Other (174) (82) (47)  
Allowance for loan and lease losses, December 31       $ 11,480
Less: Allowance included in assets of business held for sale       (243)
Total allowance for loan and lease losses, December 31 11,237 12,234 14,419  
Reserve for unfunded lending commitments, January 1 12,880 14,947    
Provision for unfunded lending commitments 3,597 3,161 2,275  
Reserve for unfunded lending commitments, December 31 11,999 12,880 14,947  
Allowance for credit losses 12,880 14,947 14,947 11,999
Unfunded loan commitments        
Allowance for Loan and Lease Losses [Roll Forward]        
Other 100      
Reserve for unfunded lending commitments, January 1 646 528 484  
Provision for unfunded lending commitments 16 118 44  
Reserve for unfunded lending commitments, December 31 762 646 528  
Allowance for credit losses 646 528 484 762
Purchased Credit-impaired        
Allowance for Loan and Lease Losses [Roll Forward]        
Loans and leases charged off (340) (808) (810)  
Provision for loan and lease losses (45) (40) (31)  
Reserve for unfunded lending commitments, January 1 804 1,700    
Reserve for unfunded lending commitments, December 31 419 804 1,700  
Allowance for credit losses 804 1,700 1,700 419
Consumer Real Estate        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, January 1 3,914 5,935 8,518  
Loans and leases charged off (1,155) (1,841) (2,219)  
Recoveries of loans and leases previously charged off 619 732 1,426  
Net charge-offs (536) (1,109) (793)  
Provision for loan and lease losses (258) (70) (976)  
Other (30) (34) (4)  
Total allowance for loan and lease losses, December 31 2,750 3,914 5,935  
Reserve for unfunded lending commitments, January 1 3,914 5,935    
Reserve for unfunded lending commitments, December 31 2,750 3,914 5,935  
Allowance for credit losses 3,914 5,935 5,935 2,750
Consumer Real Estate | Unfunded loan commitments        
Allowance for Loan and Lease Losses [Roll Forward]        
Reserve for unfunded lending commitments, January 1 0 0 0  
Provision for unfunded lending commitments 0 0 0  
Reserve for unfunded lending commitments, December 31 0 0 0  
Allowance for credit losses 0 0 0 0
Consumer Real Estate | Purchased Credit-impaired        
Allowance for Loan and Lease Losses [Roll Forward]        
Loans and leases charged off (340) (808) (810)  
Reserve for unfunded lending commitments, January 1 804      
Reserve for unfunded lending commitments, December 31 419 804    
Allowance for credit losses 804 804   419
Credit card and other consumer        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, January 1 3,471 4,047 4,905  
Loans and leases charged off (3,553) (3,620) (4,149)  
Recoveries of loans and leases previously charged off 770 813 871  
Net charge-offs (2,783) (2,807) (3,278)  
Provision for loan and lease losses 2,826 2,278 2,458  
Other (42) (47) (38)  
Allowance for loan and lease losses, December 31       3,472
Less: Allowance included in assets of business held for sale       (243)
Total allowance for loan and lease losses, December 31 3,229 3,471 4,047  
Reserve for unfunded lending commitments, January 1 3,471 4,047    
Reserve for unfunded lending commitments, December 31 3,229 3,471 4,047  
Allowance for credit losses 3,471 4,047 4,047 3,229
Credit card and other consumer | Unfunded loan commitments        
Allowance for Loan and Lease Losses [Roll Forward]        
Reserve for unfunded lending commitments, January 1 0 0 0  
Provision for unfunded lending commitments 0 0 0  
Reserve for unfunded lending commitments, December 31 0 0 0  
Allowance for credit losses 0 0 0 0
Credit card and other consumer | Purchased Credit-impaired        
Allowance for Loan and Lease Losses [Roll Forward]        
Loans and leases charged off 0 0 0  
Commercial        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, January 1 4,849 4,437 4,005  
Loans and leases charged off (740) (644) (658)  
Recoveries of loans and leases previously charged off 238 222 346  
Net charge-offs (502) (422) (312)  
Provision for loan and lease losses 1,013 835 749  
Other (102) (1) (5)  
Total allowance for loan and lease losses, December 31 5,258 4,849 4,437  
Reserve for unfunded lending commitments, January 1 5,495 4,965    
Reserve for unfunded lending commitments, December 31 6,020 5,495 4,965  
Allowance for credit losses 5,495 4,965 4,965 6,020
Commercial | Unfunded loan commitments        
Allowance for Loan and Lease Losses [Roll Forward]        
Other 100      
Reserve for unfunded lending commitments, January 1 646 528 484  
Provision for unfunded lending commitments 16 118 44  
Reserve for unfunded lending commitments, December 31 762 646 528  
Allowance for credit losses 646 528 484 $ 762
Commercial | Purchased Credit-impaired        
Allowance for Loan and Lease Losses [Roll Forward]        
Loans and leases charged off $ 0 $ 0 $ 0