Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Recurring Fair Value Inputs (Details)

v3.5.0.2
Fair Value Measurements - Recurring Fair Value Inputs (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Jun. 30, 2016
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Long-term debt $ (32,619,000,000) $ (30,097,000,000)        
Net derivative asset (987,000,000) (441,000,000) $ (648,000,000) $ 397,000,000 $ (351,000,000) $ (920,000,000)
Recurring            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 639,016,000,000 633,203,000,000        
Long-term debt (32,619,000,000) (30,097,000,000)        
Recurring | Level 3            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 15,893,000,000 18,098,000,000        
Long-term debt (1,934,000,000) (1,513,000,000)        
Net derivative asset $ (987,000,000) $ (441,000,000)        
Recurring | Level 3 | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 9.00%          
Duration 0 years          
Price (in dollars per share) $ 0          
Equity correlation 19.00% 25.00%        
Long-dated equity volatilities 4.00% 4.00%        
Recurring | Level 3 | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 46.00%          
Duration 5 years          
Price (in dollars per share) $ 100          
Equity correlation 100.00% 100.00%        
Long-dated equity volatilities 101.00% 101.00%        
Recurring | Level 3 | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 18.00%          
Duration 2 years          
Price (in dollars per share) $ 79          
Equity correlation 68.00%          
Long-dated equity volatilities 26.00%          
Recurring | Level 3 | Loans held-for-sale            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 587,000,000 $ 787,000,000        
Recurring | Level 3 | Loans and leases            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 1,400,000,000 1,600,000,000        
Recurring | Level 3 | Long-term debt            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Long-term debt (1,934,000,000) $ (1,513,000,000)        
Recurring | Level 3 | Long-term debt | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation   67.00%        
Long-dated equity volatilities   28.00%        
Recurring | Level 3 | Credit derivatives            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ (45,000,000) $ (75,000,000)        
Recurring | Level 3 | Credit derivatives | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Loss severity 35.00%          
Recurring | Level 3 | Credit derivatives | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 1.00% 6.00%        
Prepayment speed 7.00% 10.00%        
Default rate 0.00% 1.00%        
Loss severity   35.00%        
Upfront points 0.01% 0.00%        
Credit spreads 0.18% 0.00%        
Credit correlation 11.00% 31.00%        
Recurring | Level 3 | Credit derivatives | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 25.00% 25.00%        
Prepayment speed 20.00% 20.00%        
Default rate 4.00% 4.00%        
Loss severity   40.00%        
Upfront points 1.00% 1.00%        
Credit spreads 9.24% 4.47%        
Credit correlation 93.00% 99.00%        
Recurring | Level 3 | Credit derivatives | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Yield 16.00% 16.00%        
Prepayment speed 18.00% 19.00%        
Default rate 3.00% 3.00%        
Loss severity   35.00%        
Upfront points 0.74% 0.60%        
Credit spreads 2.87% 1.11%        
Credit correlation 37.00% 38.00%        
Recurring | Level 3 | Equity derivatives            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ (1,298,000,000) $ (1,037,000,000)        
Recurring | Level 3 | Equity derivatives | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 19.00% 25.00%        
Long-dated equity volatilities 4.00% 4.00%        
Recurring | Level 3 | Equity derivatives | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 100.00% 100.00%        
Long-dated equity volatilities 101.00% 101.00%        
Recurring | Level 3 | Equity derivatives | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Equity correlation 68.00% 67.00%        
Long-dated equity volatilities 26.00% 28.00%        
Recurring | Level 3 | Commodity contracts            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ 7,000,000 $ 169,000,000        
Recurring | Level 3 | Commodity contracts | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated equity volatilities 23.00% 18.00%        
Natural gas forward price (in dollars per MMBtu) $ 2 $ 1        
Propane forward price (in dollars per share)   $ 0        
Correlation 66.00% 66.00%        
Recurring | Level 3 | Commodity contracts | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated equity volatilities 71.00% 125.00%        
Natural gas forward price (in dollars per MMBtu) $ 7 $ 6        
Propane forward price (in dollars per share)   $ 1        
Correlation 93.00% 93.00%        
Recurring | Level 3 | Commodity contracts | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated equity volatilities 36.00% 39.00%        
Natural gas forward price (in dollars per MMBtu) $ 4 $ 4        
Propane forward price (in dollars per share)   $ 1        
Correlation 86.00% 84.00%        
Recurring | Level 3 | Interest rate derivatives            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Net derivative asset $ 349,000,000 $ 502,000,000        
Recurring | Level 3 | Interest rate derivatives | Minimum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated volatilities (IR) 0.00% 0.00%        
Correlation (IR/IR) 15.00% 17.00%        
Correlation (FX/IR) (2.00%) (15.00%)        
Long-dated inflation rates (12.00%) 0.00%        
Recurring | Level 3 | Interest rate derivatives | Maximum | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated volatilities (IR) 2.00% 2.00%        
Correlation (IR/IR) 99.00% 99.00%        
Correlation (FX/IR) 40.00% 40.00%        
Long-dated inflation rates 38.00% 7.00%        
Recurring | Level 3 | Interest rate derivatives | Weighted Average | Income Approach Valuation Technique            
Fair Value Inputs [Abstract]            
Long-dated volatilities (IR) 1.00% 1.00%        
Correlation (IR/IR) 60.00% 48.00%        
Correlation (FX/IR) 3.00% (9.00%)        
Long-dated inflation rates 5.00% 3.00%        
Recurring | Level 3 | Mortgage trading loans and ABS            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 1,200,000,000 $ 1,900,000,000        
Recurring | Level 3 | Corporate securities, trading loans and other            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 2,600,000,000 2,800,000,000        
Recurring | Level 3 | Non-U.S. sovereign debt            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 639,000,000 521,000,000        
Recurring | Level 3 | Other taxable securities, substantially all asset-backed securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 687,000,000 757,000,000        
Recurring | Level 3 | Tax-exempt securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 571,000,000 569,000,000        
Recurring | Level 3 | Loans and leases backed by residential real estate assets            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 1,688,000,000 $ 2,017,000,000        
Recurring | Level 3 | Loans and leases 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% 0.00%        
Loss severity 0.00% 0.00%        
Recurring | Level 3 | Loans and leases backed by residential real estate assets | Maximum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 25.00% 25.00%        
Prepayment speed 37.00% 27.00%        
Default rate 10.00% 10.00%        
Loss severity 100.00% 90.00%        
Recurring | Level 3 | Loans and leases backed by residential real estate assets | Weighted Average | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 6.00% 6.00%        
Prepayment speed 14.00% 11.00%        
Default rate 3.00% 4.00%        
Loss severity 45.00% 40.00%        
Recurring | Level 3 | Loans and leases backed by residential real estate assets | Loans held-for-sale            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 11,000,000 $ 97,000,000        
Recurring | Level 3 | Loans and leases backed by residential real estate assets | Loans and leases            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 1,353,000,000 1,520,000,000        
Recurring | Level 3 | Loans and leases backed by residential real estate assets | Mortgage trading loans and ABS | Trading Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 324,000,000 400,000,000        
Recurring | Level 3 | Instruments Backed by Commercial Real Estate Assets            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 295,000,000 $ 852,000,000        
Recurring | Level 3 | Instruments Backed by Commercial Real Estate Assets | Minimum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 0.00% 0.00%        
Price (in dollars per share) $ 0 $ 0        
Recurring | Level 3 | Instruments Backed by Commercial Real Estate Assets | Maximum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 25.00% 25.00%        
Price (in dollars per share) $ 100 $ 100        
Recurring | Level 3 | Instruments Backed by Commercial Real Estate Assets | Weighted Average | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 12.00% 8.00%        
Price (in dollars per share) $ 69 $ 73        
Recurring | Level 3 | Instruments Backed by Commercial Real Estate Assets | Loans held-for-sale            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 14,000,000 $ 690,000,000        
Recurring | Level 3 | Instruments Backed by Commercial Real Estate Assets | Mortgage trading loans and ABS            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 62,000,000 162,000,000        
Recurring | Level 3 | Instruments Backed by Commercial Real Estate Assets | Corporate securities, trading loans and other            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 219,000,000          
Recurring | Level 3 | Commercial loans, debt securities and other            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 4,397,000,000 $ 4,558,000,000        
Recurring | Level 3 | Commercial loans, debt securities and other | Minimum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 0.00% 0.00%        
Prepayment speed 5.00% 5.00%        
Default rate 3.00% 2.00%        
Loss severity 35.00% 25.00%        
Duration 0 years 0 years        
Price (in dollars per share) $ 0 $ 0        
Recurring | Level 3 | Commercial loans, debt securities and other | Maximum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 46.00% 37.00%        
Prepayment speed 20.00% 20.00%        
Default rate 4.00% 5.00%        
Loss severity 50.00% 50.00%        
Duration 5 years 5 years        
Price (in dollars per share) $ 205 $ 258        
Recurring | Level 3 | Commercial loans, debt securities and other | Weighted Average | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Yield 18.00% 13.00%        
Prepayment speed 14.00% 16.00%        
Default rate 4.00% 4.00%        
Loss severity 38.00% 37.00%        
Duration 3 years 3 years        
Price (in dollars per share) $ 70 $ 64        
Recurring | Level 3 | Commercial loans, debt securities and other | Loans held-for-sale            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 562,000,000          
Recurring | Level 3 | Commercial loans, debt securities and other | Loans and leases            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value 2,000,000 $ 100,000,000        
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 780,000,000 1,306,000,000        
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 2,304,000,000 2,503,000,000        
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 639,000,000 521,000,000        
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 110,000,000 128,000,000        
Recurring | Level 3 | Auction rate securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 1,187,000,000 $ 1,533,000,000        
Recurring | Level 3 | Auction rate securities | Minimum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Price (in dollars per share) $ 10 $ 10        
Recurring | Level 3 | Auction rate securities | Maximum | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Price (in dollars per share) 100 100        
Recurring | Level 3 | Auction rate securities | Weighted Average | Income and Market Approach Technique            
Fair Value Inputs [Abstract]            
Price (in dollars per share) $ 93 $ 94        
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 $ 39,000,000 $ 335,000,000        
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 577,000,000 629,000,000        
Recurring | Level 3 | Auction rate securities | Tax-exempt securities | Available-for-sale Securities            
Fair Value Inputs, Assets, Quantitative Information [Line Items]            
Assets, fair value $ 571,000,000 $ 569,000,000