Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Before- and After-tax (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
After-tax    
Comprehensive income $ 4,828 $ 6,001
Total other comprehensive income (loss)    
Before-tax    
Net change (193) 3,933
Tax effect    
Net change 165 (1,404)
After-tax    
Comprehensive income (28) 2,529
Available-for-sale debt securities | Debt securities    
Before-tax    
Net increase (decrease) in fair value (151) 4,038
Net realized (gains) losses reclassified into earnings (25) (183)
Net change (176) 3,855
Tax effect    
Net increase (decrease) in fair value 63 (1,535)
Net realized (gains) losses reclassified into earnings 10 69
Net change 73 (1,466)
After-tax    
Other comprehensive income (loss) before reclassification, net of tax (88) 2,503
Net realized (gains) losses reclassified into earnings (15) (114)
Comprehensive income (103) 2,389
Available-for-sale debt securities | Debt securities | Gains on sales of debt securities    
Before-tax    
Net realized (gains) losses reclassified into earnings (52) (190)
Tax effect    
Net realized (gains) losses reclassified into earnings 20 72
After-tax    
Net realized (gains) losses reclassified into earnings (32) (118)
Available-for-sale debt securities | Debt securities | Other income    
Before-tax    
Net realized (gains) losses reclassified into earnings 27 7
Tax effect    
Net realized (gains) losses reclassified into earnings (10) (3)
After-tax    
Net realized (gains) losses reclassified into earnings 17 4
Available-for-sale debt securities | Equity securities    
Before-tax    
Net increase (decrease) in fair value 27 (54)
Net realized (gains) losses reclassified into earnings (20) 0
Net change 7 (54)
Tax effect    
Net increase (decrease) in fair value (10) 21
Net realized (gains) losses reclassified into earnings 7 0
Net change (3) 21
After-tax    
Other comprehensive income (loss) before reclassification, net of tax 17 (33)
Net realized (gains) losses reclassified into earnings (13) 0
Comprehensive income 4 (33)
Debit Valuation Adjustments    
Before-tax    
Net increase (decrease) in fair value 9 195
Net realized (gains) losses reclassified into earnings 6 7
Net change 15 202
Tax effect    
Net increase (decrease) in fair value (4) (72)
Net realized (gains) losses reclassified into earnings (2) (3)
Net change (6) (75)
After-tax    
Other comprehensive income (loss) before reclassification, net of tax 5 123
Net realized (gains) losses reclassified into earnings 4 4
Comprehensive income 9 127
Derivatives    
Before-tax    
Net increase (decrease) in fair value (9) (159)
Net realized (gains) losses reclassified into earnings 70 198
Net change 61 39
Tax effect    
Net increase (decrease) in fair value 3 59
Net realized (gains) losses reclassified into earnings (26) (74)
Net change (23) (15)
After-tax    
Other comprehensive income (loss) before reclassification, net of tax (6) (100)
Net realized (gains) losses reclassified into earnings 44 124
Comprehensive income 38 24
Derivatives | Net interest income    
Before-tax    
Net realized (gains) losses reclassified into earnings 112 164
Tax effect    
Net realized (gains) losses reclassified into earnings (42) (61)
After-tax    
Net realized (gains) losses reclassified into earnings 70 103
Derivatives | Personnel    
Before-tax    
Net realized (gains) losses reclassified into earnings (42) 34
Tax effect    
Net realized (gains) losses reclassified into earnings 16 (13)
After-tax    
Net realized (gains) losses reclassified into earnings (26) 21
Employee Benefit Plans    
Before-tax    
Net realized (gains) losses reclassified into earnings 43 25
Settlements, curtailments and other 0 0
Net change 43 25
Tax effect    
Net realized (gains) losses reclassified into earnings (16) (10)
Settlements, curtailments and other 0 (5)
Net change (16) (15)
After-tax    
Net realized (gains) losses reclassified into earnings 27 15
Settlements, curtailments and other 0 (5)
Comprehensive income 27 10
Prior service cost    
Before-tax    
Net realized (gains) losses reclassified into earnings 1 1
Tax effect    
Net realized (gains) losses reclassified into earnings 0 0
After-tax    
Net realized (gains) losses reclassified into earnings 1 1
Net actuarial losses    
Before-tax    
Net realized (gains) losses reclassified into earnings 42 24
Tax effect    
Net realized (gains) losses reclassified into earnings (16) (10)
After-tax    
Net realized (gains) losses reclassified into earnings 26 14
Foreign currency    
Before-tax    
Net increase (decrease) in fair value (131) (134)
Net realized (gains) losses reclassified into earnings (12) 0
Net change (143) (134)
Tax effect    
Net increase (decrease) in fair value 108 146
Net realized (gains) losses reclassified into earnings 32  
Net change 140 146
After-tax    
Other comprehensive income (loss) before reclassification, net of tax (23) 12
Net realized (gains) losses reclassified into earnings 20 0
Comprehensive income $ (3) $ 12