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 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period $ 16,168 $ 15,766 $ 18,802 $ 12,358
Loans and leases charged off (1,061) (1,459) (2,247) (2,897)
Recoveries of loans and leases previously charged off 466 313 829 629
Net charge-offs (595) (1,146) (1,418) (2,268)
Provision for loan and lease losses (1,480) 4,775 (3,291) 9,300
Other 2 (6) 2 (1)
Allowance for loan and lease losses, end of the period 14,095 19,389 14,095 19,389
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Reserve for unfunded lending commitments, beginning balance 1,829 1,360 1,878 1,123
Provision for unfunded lending commitments (141) 342 (190) 578
Other (1)   (1) 1
Reserve for unfunded lending commitments, ending balance 1,687 1,702 1,687 1,702
Allowance for credit losses 15,782 21,091 15,782 21,091
Consumer real estate        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period 689 808 858 440
Loans and leases charged off (30) (27) (45) (62)
Recoveries of loans and leases previously charged off 60 61 114 108
Net charge-offs 30 34 69 46
Provision for loan and lease losses (122) (9) (329) 342
Other 0 0 (1) 5
Allowance for loan and lease losses, end of the period 597 833 597 833
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Reserve for unfunded lending commitments, beginning balance 124 149 137 119
Provision for unfunded lending commitments (17) (8) (30) 22
Other 0   0 0
Reserve for unfunded lending commitments, ending balance 107 141 107 141
Allowance for credit losses 704 974 704 974
Credit card and other consumer        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period 7,946 8,258 9,213 7,430
Loans and leases charged off (799) (985) (1,776) (2,106)
Recoveries of loans and leases previously charged off 256 217 501 454
Net charge-offs (543) (768) (1,275) (1,652)
Provision for loan and lease losses (568) 2,632 (1,104) 4,344
Other 0 0 1 0
Allowance for loan and lease losses, end of the period 6,835 10,122 6,835 10,122
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 0
Reserve for unfunded lending commitments, ending balance 0 0 0 0
Allowance for credit losses 6,835 10,122 6,835 10,122
Commercial        
Allowance for Loan and Lease Losses [Roll Forward]        
Allowance for loan and lease losses, beginning of the period 7,533 6,700 8,731 4,488
Loans and leases charged off (232) (447) (426) (729)
Recoveries of loans and leases previously charged off 150 35 214 67
Net charge-offs (82) (412) (212) (662)
Provision for loan and lease losses (790) 2,152 (1,858) 4,614
Other 2 (6) 2 (6)
Allowance for loan and lease losses, end of the period 6,663 8,434 6,663 8,434
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]        
Reserve for unfunded lending commitments, beginning balance 1,705 1,211 1,741 1,004
Provision for unfunded lending commitments (124) 350 (160) 556
Other (1)   (1) 1
Reserve for unfunded lending commitments, ending balance 1,580 1,561 1,580 1,561
Allowance for credit losses $ 8,243 $ 9,995 $ 8,243 $ 9,995