Quarterly report pursuant to Section 13 or 15(d)

Fair Value Option - Gains (Losses) Relating to Assets and Liabilities (Details)

v3.10.0.1
Fair Value Option - Gains (Losses) Relating to Assets and Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option $ 1,877 $ 745 $ 3,457 $ 1,951
Loans reported as trading account assets        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option (32) 47 71 197
Trading inventory – other        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1,361 522 1,956 1,673
Consumer and commercial loans        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 8 24 93 48
Loans held-for-sale        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option (1) 75 3 170
Long-term debt        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 520 73 1,298 (126)
Other        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 21 4 36 (11)
Trading Account Profits        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1,889 684 3,520 1,771
Trading Account Profits | Loans reported as trading account assets        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option (32) 47 71 197
Trading Account Profits | Trading inventory – other        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1,361 522 1,956 1,673
Trading Account Profits | Consumer and commercial loans        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 19 4 125 9
Trading Account Profits | Loans held-for-sale        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 (1) 1 0
Trading Account Profits | Long-term debt        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 535 107 1,354 (55)
Trading Account Profits | Other        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 6 5 13 (53)
Other Income        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option (12) 61 (63) 180
Other Income | Loans reported as trading account assets        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0 0 0
Other Income | Trading inventory – other        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0 0 0
Other Income | Consumer and commercial loans        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option (11) 20 (32) 39
Other Income | Loans held-for-sale        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option (1) 76 2 170
Other Income | Long-term debt        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option (15) (34) (56) (71)
Other Income | Other        
Fair Value, Option, Quantitative Disclosures [Line Items]        
Gains (losses) relating to assets and liabilities accounted for under the fair value option $ 15 $ (1) $ 23 $ 42