Annual report pursuant to Section 13 and 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
Dec. 31, 2020
Dec. 31, 2019
Fair Value    
Less than Twelve Months $ 18,763 $ 39,109
Twelve Months or Longer 2,077 38,742
Total 20,840 77,851
Gross Unrealized Losses    
Less than Twelve Months (100) (146)
Twelve Months or Longer (31) (298)
Total (131) (444)
Mortgage-backed securities    
Fair Value    
Less than Twelve Months 3,936 20,198
Twelve Months or Longer 431 18,627
Total 4,367 38,825
Gross Unrealized Losses    
Less than Twelve Months (54) (70)
Twelve Months or Longer (19) (171)
Total (73) (241)
Agency    
Fair Value    
Less than Twelve Months 2,841 17,641
Twelve Months or Longer 2 17,238
Total 2,843 34,879
Gross Unrealized Losses    
Less than Twelve Months (39) (41)
Twelve Months or Longer 0 (142)
Total (39) (183)
Agency-collateralized mortgage obligations    
Fair Value    
Less than Twelve Months 187 255
Twelve Months or Longer 364 925
Total 551 1,180
Gross Unrealized Losses    
Less than Twelve Months (2) (1)
Twelve Months or Longer (11) (23)
Total (13) (24)
Commercial    
Fair Value    
Less than Twelve Months 566 2,180
Twelve Months or Longer 9 442
Total 575 2,622
Gross Unrealized Losses    
Less than Twelve Months (4) (22)
Twelve Months or Longer 0 (3)
Total (4) (25)
Non-agency residential    
Fair Value    
Less than Twelve Months 342 122
Twelve Months or Longer 56 22
Total 398 144
Gross Unrealized Losses    
Less than Twelve Months (9) (6)
Twelve Months or Longer (8) (3)
Total (17) (9)
U.S. Treasury and agency securities    
Fair Value    
Less than Twelve Months 8,282 12,836
Twelve Months or Longer 498 18,866
Total 8,780 31,702
Gross Unrealized Losses    
Less than Twelve Months (9) (71)
Twelve Months or Longer (4) (124)
Total (13) (195)
Non-U.S. securities    
Fair Value    
Less than Twelve Months 1,861 851
Twelve Months or Longer 135 837
Total 1,996 1,688
Gross Unrealized Losses    
Less than Twelve Months (6) 0
Twelve Months or Longer (1) (2)
Total (7) (2)
Other taxable securities, substantially all asset-backed securities    
Fair Value    
Less than Twelve Months 576 938
Twelve Months or Longer 396 222
Total 972 1,160
Gross Unrealized Losses    
Less than Twelve Months (2) 0
Twelve Months or Longer (4) 0
Total (6) 0
Total taxable securities    
Fair Value    
Less than Twelve Months 14,655 34,823
Twelve Months or Longer 1,460 38,552
Total 16,115 73,375
Gross Unrealized Losses    
Less than Twelve Months (71) (141)
Twelve Months or Longer (28) (297)
Total (99) (438)
Tax-exempt securities    
Fair Value    
Less than Twelve Months 4,108 4,286
Twelve Months or Longer 617 190
Total 4,725 4,476
Gross Unrealized Losses    
Less than Twelve Months (29) (5)
Twelve Months or Longer (3) (1)
Total $ (32) $ (6)