Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Pre- and After-tax (Details)

v3.10.0.1
Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Pre- and After-tax (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
After-tax        
Comprehensive income $ 5,664 $ 5,861 $ 14,328 $ 16,987
Total other comprehensive income (loss)        
Pre-tax        
Net change     (8,618) 581
Tax effect        
Net change     2,077 539
After-tax        
Comprehensive income     (6,541) 1,120
Debt and Equity Securities        
Pre-tax        
Net increase (decrease) in fair value     (8,198) 1,802
Net realized (gains) losses reclassified into earnings     (55) (312)
Net change     (8,253) 1,490
Tax effect        
Net increase (decrease) in fair value     2,075 (674)
Net realized (gains) losses reclassified into earnings     12 115
Net change     2,087 (559)
After-tax        
Other comprehensive income (loss) before reclassification, net of tax     (6,123) 1,128
Net realized (gains) losses reclassified into earnings     (43) (197)
Comprehensive income     (6,166) 931
Debit Valuation Adjustments        
Pre-tax        
Net increase (decrease) in fair value     220 (255)
Net realized (gains) losses reclassified into earnings     20 30
Net change     240 (225)
Tax effect        
Net increase (decrease) in fair value     (52) 96
Net realized (gains) losses reclassified into earnings     (5) (20)
Net change     (57) 76
After-tax        
Other comprehensive income (loss) before reclassification, net of tax     168 (159)
Net realized (gains) losses reclassified into earnings     15 10
Comprehensive income     183 (149)
Derivatives        
Pre-tax        
Net increase (decrease) in fair value     (601) 79
Net realized (gains) losses reclassified into earnings     107 171
Net change     (494) 250
Tax effect        
Net increase (decrease) in fair value     174 (30)
Net realized (gains) losses reclassified into earnings     (26) (64)
Net change     148 (94)
After-tax        
Other comprehensive income (loss) before reclassification, net of tax     (427) 49
Net realized (gains) losses reclassified into earnings     81 107
Comprehensive income     (346) 156
Derivatives | Net interest income        
Pre-tax        
Net realized (gains) losses reclassified into earnings     134 274
Tax effect        
Net realized (gains) losses reclassified into earnings     (33) (103)
After-tax        
Net realized (gains) losses reclassified into earnings     101 171
Derivatives | Personnel expense        
Pre-tax        
Net realized (gains) losses reclassified into earnings     (27) (103)
Tax effect        
Net realized (gains) losses reclassified into earnings     7 39
After-tax        
Net realized (gains) losses reclassified into earnings     (20) (64)
Employee Benefit Plans        
Pre-tax        
Net realized (gains) losses reclassified into earnings     119 128
Net change     119 128
Tax effect        
Net realized (gains) losses reclassified into earnings     (28) (48)
Net change     (28) (48)
After-tax        
Net realized (gains) losses reclassified into earnings     91 80
Comprehensive income     91 80
Net actuarial losses and other        
Pre-tax        
Net realized (gains) losses reclassified into earnings     119 128
Tax effect        
Net realized (gains) losses reclassified into earnings     (28) (48)
After-tax        
Net realized (gains) losses reclassified into earnings     91 80
Foreign currency        
Pre-tax        
Net increase (decrease) in fair value     (87) (454)
Net realized (gains) losses reclassified into earnings     (143) (608)
Net change     (230) (1,062)
Tax effect        
Net increase (decrease) in fair value     (165) 462
Net realized (gains) losses reclassified into earnings     92 702
Net change     (73) 1,164
After-tax        
Other comprehensive income (loss) before reclassification, net of tax     (252) 8
Net realized (gains) losses reclassified into earnings     (51) 94
Comprehensive income     $ (303) $ 102