Quarterly report pursuant to Section 13 or 15(d)

Securities - AFS Debt Securities in a Continuous Unrealized Loss Position (Details)

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Securities - AFS Debt Securities in a Continuous Unrealized Loss Position (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Fair Value    
Less than Twelve Months $ 60,951 $ 18,763
Twelve Months or Longer 3,030 2,077
Total 63,981 20,840
Gross Unrealized Losses    
Less than Twelve Months (299) (100)
Twelve Months or Longer (72) (31)
Total (371) (131)
Mortgage-backed securities    
Fair Value    
Less than Twelve Months 14,945 3,936
Twelve Months or Longer 1,664 431
Total 16,609 4,367
Gross Unrealized Losses    
Less than Twelve Months (138) (54)
Twelve Months or Longer (48) (19)
Total (186) (73)
Agency    
Fair Value    
Less than Twelve Months 10,421 2,841
Twelve Months or Longer 1,037 2
Total 11,458 2,843
Gross Unrealized Losses    
Less than Twelve Months (72) (39)
Twelve Months or Longer (18) 0
Total (90) (39)
Agency-collateralized mortgage obligations    
Fair Value    
Less than Twelve Months 1,528 187
Twelve Months or Longer 192 364
Total 1,720 551
Gross Unrealized Losses    
Less than Twelve Months (6) (2)
Twelve Months or Longer (5) (11)
Total (11) (13)
Commercial    
Fair Value    
Less than Twelve Months 2,517 566
Twelve Months or Longer 322 9
Total 2,839 575
Gross Unrealized Losses    
Less than Twelve Months (35) (4)
Twelve Months or Longer (15) 0
Total (50) (4)
Non-agency residential    
Fair Value    
Less than Twelve Months 479 342
Twelve Months or Longer 113 56
Total 592 398
Gross Unrealized Losses    
Less than Twelve Months (25) (9)
Twelve Months or Longer (10) (8)
Total (35) (17)
U.S. Treasury and government agencies    
Fair Value    
Less than Twelve Months 45,297 8,282
Twelve Months or Longer 944 498
Total 46,241 8,780
Gross Unrealized Losses    
Less than Twelve Months (151) (9)
Twelve Months or Longer (12) (4)
Total (163) (13)
Non-U.S. securities    
Fair Value    
Less than Twelve Months   1,861
Twelve Months or Longer   135
Total   1,996
Gross Unrealized Losses    
Less than Twelve Months   (6)
Twelve Months or Longer   (1)
Total   (7)
Other taxable securities    
Fair Value    
Less than Twelve Months 336 576
Twelve Months or Longer 0 396
Total 336 972
Gross Unrealized Losses    
Less than Twelve Months (1) (2)
Twelve Months or Longer 0 (4)
Total (1) (6)
Tax-exempt securities    
Fair Value    
Less than Twelve Months 373 4,108
Twelve Months or Longer 422 617
Total 795 4,725
Gross Unrealized Losses    
Less than Twelve Months (9) (29)
Twelve Months or Longer (12) (3)
Total $ (21) $ (32)