Annual report pursuant to Section 13 and 15(d)

Fair Value Option - Changes in FV of Assets and Liabilities (Details)

v2.4.1.9
Fair Value Option - Changes in FV of Assets and Liabilities (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option $ 2,395us-gaap_FairValueOptionChangesInFairValueGainLoss1 $ 1,385us-gaap_FairValueOptionChangesInFairValueGainLoss1 $ (1,756)us-gaap_FairValueOptionChangesInFairValueGainLoss1
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 (87)us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Trading inventory – other      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option 1,091us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Loans and leases      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option 45us-gaap_FairValueOptionChangesInFairValueGainLoss1
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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 825us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Securities financing agreements      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option (110)us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Other assets      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option   (77)us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Long-term deposits      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option (3)us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Asset-backed securities      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option   (91)us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Unfunded loan commitments      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option (64)us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Short-term borrowings      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option 52us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Long-term debt      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option 646us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Trading Account Profits (Losses)      
Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option 1,128us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Fair Value, Option, Quantitative Disclosures [Line Items]      
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Fair Value, Option, Quantitative Disclosures [Line Items]      
Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option 1,091us-gaap_FairValueOptionChangesInFairValueGainLoss1
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Fair Value, Option, Quantitative Disclosures [Line Items]      
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Fair Value, Option, Quantitative Disclosures [Line Items]      
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Fair Value, Option, Quantitative Disclosures [Line Items]      
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Fair Value, Option, Quantitative Disclosures [Line Items]      
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Fair Value, Option, Quantitative Disclosures [Line Items]      
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