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
Mar. 31, 2020
Dec. 31, 2019
Fair Value    
Less than Twelve Months $ 12,376 $ 39,109
Twelve Months or Longer 6,091 38,742
Total 18,467 77,851
Gross Unrealized Losses    
Less than Twelve Months (330) (146)
Twelve Months or Longer (71) (298)
Total (401) (444)
Mortgage-backed securities    
Fair Value    
Less than Twelve Months 1,113 20,198
Twelve Months or Longer 1,672 18,627
Total 2,785 38,825
Gross Unrealized Losses    
Less than Twelve Months (76) (70)
Twelve Months or Longer (26) (171)
Total (102) (241)
Agency    
Fair Value    
Less than Twelve Months 0 17,641
Twelve Months or Longer 704 17,238
Total 704 34,879
Gross Unrealized Losses    
Less than Twelve Months 0 (41)
Twelve Months or Longer (1) (142)
Total (1) (183)
Agency-collateralized mortgage obligations    
Fair Value    
Less than Twelve Months 6 255
Twelve Months or Longer 582 925
Total 588 1,180
Gross Unrealized Losses    
Less than Twelve Months 0 (1)
Twelve Months or Longer (9) (23)
Total (9) (24)
Commercial    
Fair Value    
Less than Twelve Months 652 2,180
Twelve Months or Longer 348 442
Total 1,000 2,622
Gross Unrealized Losses    
Less than Twelve Months (9) (22)
Twelve Months or Longer (3) (3)
Total (12) (25)
Non-agency residential    
Fair Value    
Less than Twelve Months 455 122
Twelve Months or Longer 38 22
Total 493 144
Gross Unrealized Losses    
Less than Twelve Months (67) (6)
Twelve Months or Longer (13) (3)
Total (80) (9)
U.S. Treasury and agency securities    
Fair Value    
Less than Twelve Months (495) 12,836
Twelve Months or Longer 523 18,866
Total 28 31,702
Gross Unrealized Losses    
Less than Twelve Months (7) (71)
Twelve Months or Longer (2) (124)
Total (9) (195)
Non-U.S. securities    
Fair Value    
Less than Twelve Months 2,733 851
Twelve Months or Longer 513 837
Total 3,246 1,688
Gross Unrealized Losses    
Less than Twelve Months (10) 0
Twelve Months or Longer (1) (2)
Total (11) (2)
Other taxable securities, substantially all asset-backed securities    
Fair Value    
Less than Twelve Months 2,950 938
Twelve Months or Longer 293 222
Total 3,243 1,160
Gross Unrealized Losses    
Less than Twelve Months (191) 0
Twelve Months or Longer (13) 0
Total (204) 0
Total taxable securities    
Fair Value    
Less than Twelve Months 6,301 34,823
Twelve Months or Longer 3,001 38,552
Total 9,302 73,375
Gross Unrealized Losses    
Less than Twelve Months (284) (141)
Twelve Months or Longer (42) (297)
Total (326) (438)
Tax-exempt securities    
Fair Value    
Less than Twelve Months 6,075 4,286
Twelve Months or Longer 3,090 190
Total 9,165 4,476
Gross Unrealized Losses    
Less than Twelve Months (46) (5)
Twelve Months or Longer (29) (1)
Total $ (75) $ (6)