Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases and Allowance for Credit Losses - Allowance by Portfolio Segment (Details)

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Outstanding Loans and Leases and Allowance for Credit Losses - Allowance by Portfolio Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period $ 14,095 $ 19,389 $ 18,802 $ 12,358
Loans and leases charged off (806) (1,293) (3,053) (4,190)
Recoveries of loans and leases previously charged off 343 321 1,172 950
Net charge-offs (463) (972) (1,881) (3,240)
Provision for loan and lease losses (475) 1,180 (3,766) 10,480
Other (2) (1) 0 (2)
Allowance for loan and lease losses, end of the period 13,155 19,596 13,155 19,596
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Reserve for unfunded lending commitments, beginning balance 1,687 1,702 1,878 1,123
Provision for unfunded lending commitments (149) 209 (339) 787
Other   (1) (1)  
Reserve for unfunded lending commitments, ending balance 1,538 1,910 1,538 1,910
Allowance for credit losses 14,693 21,506 14,693 21,506
Consumer real estate        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period 597 833 858 440
Loans and leases charged off (15) (13) (60) (75)
Recoveries of loans and leases previously charged off 56 39 170 147
Net charge-offs 41 26 110 72
Provision for loan and lease losses (85) (6) (414) 336
Other 2 2 1 7
Allowance for loan and lease losses, end of the period 555 855 555 855
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Reserve for unfunded lending commitments, beginning balance 107 141 137 119
Provision for unfunded lending commitments (9) (3) (39) 19
Other   0 0  
Reserve for unfunded lending commitments, ending balance 98 138 98 138
Allowance for credit losses 653 993 653 993
Credit card and other consumer        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period 6,835 10,122 9,213 7,430
Loans and leases charged off (626) (810) (2,402) (2,916)
Recoveries of loans and leases previously charged off 256 220 757 674
Net charge-offs (370) (590) (1,645) (2,242)
Provision for loan and lease losses 175 304 (929) 4,648
Other (1) 0 0 0
Allowance for loan and lease losses, end of the period 6,639 9,836 6,639 9,836
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Reserve for unfunded lending commitments, beginning balance 0 0 0 0
Provision for unfunded lending commitments 0 0 0 0
Other   0 0  
Reserve for unfunded lending commitments, ending balance 0 0 0 0
Allowance for credit losses 6,639 9,836 6,639 9,836
Commercial        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period 6,663 8,434 8,731 4,488
Loans and leases charged off (165) (470) (591) (1,199)
Recoveries of loans and leases previously charged off 31 62 245 129
Net charge-offs (134) (408) (346) (1,070)
Provision for loan and lease losses (565) 882 (2,423) 5,496
Other (3) (3) (1) (9)
Allowance for loan and lease losses, end of the period 5,961 8,905 5,961 8,905
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Reserve for unfunded lending commitments, beginning balance 1,580 1,561 1,741 1,004
Provision for unfunded lending commitments (140) 212 (300) 768
Other   (1) (1)  
Reserve for unfunded lending commitments, ending balance 1,440 1,772 1,440 1,772
Allowance for credit losses $ 7,401 $ 10,677 $ 7,401 $ 10,677