Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Recurring Fair Value Inputs (Details)

v3.3.0.814
Fair Value Measurements - Recurring Fair Value Inputs (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Jun. 30, 2015
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2013
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Long-term debt $ (29,185,000,000) $ (36,404,000,000)        
Net derivative asset 397,000,000 (920,000,000) $ (351,000,000) $ (752,000,000) $ (1,035,000,000) $ (224,000,000)
Recurring            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 651,355,000,000 660,229,000,000        
Long-term debt (29,185,000,000) (36,404,000,000)        
Recurring | Level 3            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 19,345,000,000 22,262,000,000        
Long-term debt (1,910,000,000) (2,362,000,000)        
Net derivative asset 397,000,000 (920,000,000)        
Recurring | Level 3 | Loans held-for-sale            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 559,000,000 173,000,000        
Recurring | Level 3 | Loans and leases            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 2,000,000,000 2,000,000,000        
Recurring | Level 3 | Credit derivatives            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ 453,000,000 $ 22,000,000        
Recurring | Level 3 | Credit derivatives | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Default rate 1.00% 4.00%        
Loss severity   35.00%        
Recurring | Level 3 | Credit derivatives | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 0.00% 0.00%        
Prepayment speed 10.00% 3.00%        
Loss severity 20.00%          
Upfront points 0.00% 0.00%        
Spread to index 0.00% 0.25%        
Credit correlation 30.00% 24.00%        
Recurring | Level 3 | Credit derivatives | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 26.00% 25.00%        
Prepayment speed 20.00% 20.00%        
Default rate 4.00%          
Loss severity 35.00%          
Upfront points 1.01% 1.00%        
Spread to index 5.30% 4.50%        
Credit correlation 99.00% 99.00%        
Recurring | Level 3 | Credit derivatives | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 17.00% 14.00%        
Prepayment speed 19.00% 11.00%        
Default rate 3.00%          
Loss severity 35.00%          
Upfront points 0.75% 0.65%        
Spread to index   1.19%        
Credit correlation 40.00% 51.00%        
Recurring | Level 3 | Equity derivatives            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ (831,000,000) $ (1,560,000,000)        
Recurring | Level 3 | Equity derivatives | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 24.00% 20.00%        
Long-dated equity volatilities 4.00% 6.00%        
Recurring | Level 3 | Equity derivatives | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 98.00% 98.00%        
Long-dated equity volatilities 103.00% 69.00%        
Recurring | Level 3 | Equity derivatives | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 65.00% 65.00%        
Long-dated equity volatilities 28.00% 24.00%        
Recurring | Level 3 | Commodity contracts            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ 161,000,000 $ 141,000,000        
Recurring | Level 3 | Commodity contracts | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated equity volatilities 18.00% 16.00%        
Natural gas forward price (in dollars per MMBtu) $ 2 $ 2.00        
Propane forward price (in dollars per gallon) $ 0.4          
Correlation 66.00% 82.00%        
Recurring | Level 3 | Commodity contracts | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated equity volatilities 78.00% 98.00%        
Natural gas forward price (in dollars per MMBtu) $ 7 $ 7.00        
Propane forward price (in dollars per gallon) $ 0.6          
Correlation 93.00% 93.00%        
Recurring | Level 3 | Commodity contracts | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated equity volatilities 34.00% 35.00%        
Natural gas forward price (in dollars per MMBtu) $ 4 $ 5.00        
Propane forward price (in dollars per gallon) $ 0.5          
Correlation 86.00% 90.00%        
Recurring | Level 3 | Interest rate derivatives            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ 614,000,000 $ 477,000,000        
Recurring | Level 3 | Interest rate derivatives | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Correlation (IR/IR) 22.00% 11.00%        
Long-dated volatilities (IR) 0.00% 0.00%        
Correlation (FX/IR) (25.00%) (48.00%)        
Long-dated inflation rates 0.00% 0.00%        
Recurring | Level 3 | Interest rate derivatives | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Correlation (IR/IR) 99.00% 99.00%        
Long-dated volatilities (IR) 2.00% 2.00%        
Correlation (FX/IR) 40.00% 40.00%        
Long-dated inflation rates 7.00% 3.00%        
Recurring | Level 3 | Interest rate derivatives | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Correlation (IR/IR) 47.00% 55.00%        
Long-dated volatilities (IR) 1.00% 1.00%        
Correlation (FX/IR) (7.00%) (5.00%)        
Long-dated inflation rates 2.00% 1.00%        
Recurring | Level 3 | Mortgage trading loans and ABS            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 2,000,000,000 $ 2,100,000,000        
Recurring | Level 3 | Corporate securities, trading loans and other            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 2,900,000,000 3,300,000,000        
Recurring | Level 3 | Non-U.S. sovereign debt            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 384,000,000 574,000,000        
Recurring | Level 3 | Other taxable securities, substantially all asset-backed securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 581,000,000 1,700,000,000        
Recurring | Level 3 | Tax-exempt securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 569,000,000 599,000,000        
Recurring | Level 3 | Instruments backed by residential real estate assets            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 2,349,000,000 $ 2,030,000,000        
Recurring | Level 3 | Instruments backed by residential real estate assets | Minimum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 0.00% 0.00%        
Prepayment speed 0.00% 0.00%        
Default rate 0.00% 2.00%        
Loss severity 0.00% 26.00%        
Recurring | Level 3 | Instruments backed by residential real estate assets | Maximum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 25.00% 25.00%        
Prepayment speed 27.00% 35.00%        
Default rate 10.00% 15.00%        
Loss severity 90.00% 100.00%        
Recurring | Level 3 | Instruments backed by residential real estate assets | Weighted Average | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 6.00% 6.00%        
Prepayment speed 11.00% 14.00%        
Default rate 4.00% 7.00%        
Loss severity 41.00% 34.00%        
Recurring | Level 3 | Instruments backed by residential real estate assets | Loans held-for-sale            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 559,000,000 $ 173,000,000        
Recurring | Level 3 | Instruments backed by residential real estate assets | Loans and leases            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 1,337,000,000 1,374,000,000        
Recurring | Level 3 | Instruments backed by residential real estate assets | Mortgage trading loans and ABS | Trading Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 453,000,000 483,000,000        
Recurring | Level 3 | Commercial loans, debt securities and other            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 5,204,000,000 $ 7,203,000,000        
Recurring | Level 3 | Commercial loans, debt securities and other | Minimum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 0.00% 0.00%        
Enterprise value/EBITDA multiple   0        
Prepayment speed 5.00% 1.00%        
Default rate 1.00% 1.00%        
Loss severity 25.00% 25.00%        
Duration 0 years 0 years        
Price (in usd per share) $ 0 $ 0.00        
Recurring | Level 3 | Commercial loans, debt securities and other | Maximum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 29.00% 40.00%        
Enterprise value/EBITDA multiple   30        
Prepayment speed 30.00% 30.00%        
Default rate 5.00% 5.00%        
Loss severity 50.00% 40.00%        
Duration 5 years 5 years        
Price (in usd per share) $ 275 $ 107.00        
Recurring | Level 3 | Commercial loans, debt securities and other | Weighted Average | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 4.00% 9.00%        
Enterprise value/EBITDA multiple   6        
Prepayment speed 16.00% 12.00%        
Default rate 4.00% 4.00%        
Loss severity 37.00% 38.00%        
Duration 3 years 3 years        
Price (in usd per share) $ 69.00 $ 76        
Recurring | Level 3 | Commercial loans, debt securities and other | Loans and leases            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 647,000,000 $ 609,000,000        
Recurring | Level 3 | Commercial loans, debt securities and other | Mortgage trading loans and ABS | Trading Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 1,552,000,000 1,580,000,000        
Recurring | Level 3 | Commercial loans, debt securities and other | Corporate securities, trading loans and other | Trading Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 2,493,000,000 3,224,000,000        
Recurring | Level 3 | Commercial loans, debt securities and other | Non-U.S. sovereign debt | Trading Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 384,000,000 574,000,000        
Recurring | Level 3 | Commercial loans, debt securities and other | Other taxable securities, substantially all asset-backed securities | Available-for-sale Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 128,000,000 1,216,000,000        
Recurring | Level 3 | Auction rate securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 1,428,000,000 $ 1,096,000,000        
Recurring | Level 3 | Auction rate securities | Minimum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Price (in usd per share) $ 10 $ 60.00        
Recurring | Level 3 | Auction rate securities | Maximum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Price (in usd per share) 102 100.00        
Recurring | Level 3 | Auction rate securities | Weighted Average | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Price (in usd per share) $ 94.00 $ 95        
Recurring | Level 3 | Auction rate securities | Corporate securities, trading loans and other | Trading Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 406,000,000 $ 46,000,000        
Recurring | Level 3 | Auction rate securities | Other taxable securities, substantially all asset-backed securities | Available-for-sale Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 453,000,000 451,000,000        
Recurring | Level 3 | Auction rate securities | Tax-exempt securities | Available-for-sale Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 569,000,000 $ 599,000,000        
Recurring | Level 3 | Structured liabilities | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 24.00% 20.00%        
Long-dated equity volatilities 4.00% 6.00%        
Long-dated volatilities (IR)   0.00%        
Recurring | Level 3 | Structured liabilities | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 98.00% 98.00%        
Long-dated equity volatilities 103.00% 69.00%        
Long-dated volatilities (IR)   2.00%        
Recurring | Level 3 | Structured liabilities | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 65.00%          
Long-dated equity volatilities 28.00%          
Recurring | Level 3 | Structured liabilities | Long-term debt            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Long-term debt $ (1,910,000,000) $ (2,362,000,000)        
Recurring | Level 3 | Structured liabilities | Long-term debt | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation   65.00%        
Long-dated equity volatilities   24.00%        
Long-dated volatilities (IR)   1.00%