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, 2020
Dec. 31, 2019
Fair Value    
Less than Twelve Months $ 17,857 $ 39,109
Twelve Months or Longer 2,747 38,742
Total 20,604 77,851
Gross Unrealized Losses    
Less than Twelve Months (128) (146)
Twelve Months or Longer (44) (298)
Total (172) (444)
Mortgage-backed securities    
Fair Value    
Less than Twelve Months 6,096 20,198
Twelve Months or Longer 714 18,627
Total 6,810 38,825
Gross Unrealized Losses    
Less than Twelve Months (74) (70)
Twelve Months or Longer (23) (171)
Total (97) (241)
Agency    
Fair Value    
Less than Twelve Months 5,284 17,641
Twelve Months or Longer 2 17,238
Total 5,286 34,879
Gross Unrealized Losses    
Less than Twelve Months (51) (41)
Twelve Months or Longer 0 (142)
Total (51) (183)
Agency-collateralized mortgage obligations    
Fair Value    
Less than Twelve Months 242 255
Twelve Months or Longer 447 925
Total 689 1,180
Gross Unrealized Losses    
Less than Twelve Months (3) (1)
Twelve Months or Longer (12) (23)
Total (15) (24)
Commercial    
Fair Value    
Less than Twelve Months 244 2,180
Twelve Months or Longer 190 442
Total 434 2,622
Gross Unrealized Losses    
Less than Twelve Months (1) (22)
Twelve Months or Longer 0 (3)
Total (1) (25)
Non-agency residential    
Fair Value    
Less than Twelve Months 326 122
Twelve Months or Longer 75 22
Total 401 144
Gross Unrealized Losses    
Less than Twelve Months (19) (6)
Twelve Months or Longer (11) (3)
Total (30) (9)
U.S. Treasury and agency securities    
Fair Value    
Less than Twelve Months 3,893 12,836
Twelve Months or Longer 503 18,866
Total 4,396 31,702
Gross Unrealized Losses    
Less than Twelve Months (3) (71)
Twelve Months or Longer (4) (124)
Total (7) (195)
Non-U.S. securities    
Fair Value    
Less than Twelve Months 2,749 851
Twelve Months or Longer 224 837
Total 2,973 1,688
Gross Unrealized Losses    
Less than Twelve Months (11) 0
Twelve Months or Longer (2) (2)
Total (13) (2)
Other taxable securities, substantially all asset-backed securities    
Fair Value    
Less than Twelve Months 984 938
Twelve Months or Longer 342 222
Total 1,326 1,160
Gross Unrealized Losses    
Less than Twelve Months (5) 0
Twelve Months or Longer (5) 0
Total (10) 0
Total taxable securities    
Fair Value    
Less than Twelve Months 13,722 34,823
Twelve Months or Longer 1,783 38,552
Total 15,505 73,375
Gross Unrealized Losses    
Less than Twelve Months (93) (141)
Twelve Months or Longer (34) (297)
Total (127) (438)
Tax-exempt securities    
Fair Value    
Less than Twelve Months 4,135 4,286
Twelve Months or Longer 964 190
Total 5,099 4,476
Gross Unrealized Losses    
Less than Twelve Months (35) (5)
Twelve Months or Longer (10) (1)
Total $ (45) $ (6)