Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Recurring Fair Value Inputs (Details)

v3.7.0.1
Fair Value Measurements - Recurring Fair Value Inputs (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Net derivative asset (liability) $ (1,665,000,000) $ (1,313,000,000) $ (315,000,000) $ (441,000,000)
Recurring        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 649,142,000,000 614,410,000,000    
Long-term debt (197,875,000,000) (185,699,000,000)    
Recurring | Level 3        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 13,876,000,000 14,462,000,000    
Long-term debt (7,747,000,000) (7,153,000,000)    
Net derivative asset (liability) $ (1,665,000,000) $ (1,313,000,000)    
Recurring | Level 3 | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Yield 5.00% 6.00%    
Price (in dollars per share) $ 12 $ 12    
Duration 0 years 0 years    
Equity correlation 8.00% 13.00%    
Long-dated equity volatilities 4.00% 4.00%    
Recurring | Level 3 | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Yield 27.00% 37.00%    
Price (in dollars per share) $ 90 $ 87    
Duration 4 years 5 years    
Equity correlation 100.00% 100.00%    
Long-dated equity volatilities 69.00% 76.00%    
Recurring | Level 3 | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Yield 18.00% 20.00%    
Price (in dollars per share) $ 79 $ 73    
Duration 3 years 3 years    
Equity correlation 68.00% 68.00%    
Long-dated equity volatilities 24.00% 26.00%    
Recurring | Level 3 | Loans and leases        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 702,000,000 $ 720,000,000    
Recurring | Level 3 | Loans Held-for-Sale        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 792,000,000 656,000,000    
Recurring | Level 3 | Credit derivatives        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Net derivative asset (liability) $ 88,000,000 $ (129,000,000)    
Recurring | Level 3 | Credit derivatives | Discounted cash flow, Stochastic recovery correlation model        
Fair Value Inputs [Abstract]        
Loss severity 35.00% 35.00%    
Recurring | Level 3 | Credit derivatives | Minimum | Discounted cash flow, Stochastic recovery correlation model        
Fair Value Inputs [Abstract]        
Yield 0.00% 0.00%    
Prepayment speed 10.00% 10.00%    
Default rate 1.00% 1.00%    
Upfront points 0.00% 0.00%    
Credit spreads 0.51% 0.17%    
Credit correlation 26.00% 21.00%    
Recurring | Level 3 | Credit derivatives | Maximum | Discounted cash flow, Stochastic recovery correlation model        
Fair Value Inputs [Abstract]        
Yield 24.00% 24.00%    
Prepayment speed 20.00% 20.00%    
Default rate 4.00% 4.00%    
Upfront points 1.00% 1.00%    
Credit spreads 6.68% 8.14%    
Credit correlation 87.00% 80.00%    
Recurring | Level 3 | Credit derivatives | Weighted Average | Discounted cash flow, Stochastic recovery correlation model        
Fair Value Inputs [Abstract]        
Yield 8.00% 13.00%    
Prepayment speed 17.00% 18.00%    
Default rate 3.00% 3.00%    
Upfront points 0.72% 0.72%    
Credit spreads 4.93% 2.48%    
Credit correlation 48.00% 44.00%    
Recurring | Level 3 | Equity contracts        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Net derivative asset (liability) $ (2,050,000,000) $ (1,690,000,000)    
Recurring | Level 3 | Equity contracts | Minimum | Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Equity correlation 8.00% 13.00%    
Long-dated equity volatilities 4.00% 4.00%    
Recurring | Level 3 | Equity contracts | Maximum | Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Equity correlation 100.00% 100.00%    
Long-dated equity volatilities 69.00% 76.00%    
Recurring | Level 3 | Equity contracts | Weighted Average | Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Equity correlation 68.00% 68.00%    
Long-dated equity volatilities 24.00% 26.00%    
Recurring | Level 3 | Commodity contracts        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Net derivative asset (liability) $ 5,000,000 $ 6,000,000    
Recurring | Level 3 | Commodity contracts | Minimum | Discounted cash flow, Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Long-dated equity volatilities 24.00% 23.00%    
Natural gas forward price $ 2 $ 2    
Correlation 76.00% 66.00%    
Recurring | Level 3 | Commodity contracts | Maximum | Discounted cash flow, Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Long-dated equity volatilities 112.00% 96.00%    
Natural gas forward price $ 6 $ 6    
Correlation 95.00% 95.00%    
Recurring | Level 3 | Commodity contracts | Weighted Average | Discounted cash flow, Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Long-dated equity volatilities 40.00% 36.00%    
Natural gas forward price $ 3 $ 4    
Correlation 90.00% 85.00%    
Recurring | Level 3 | Interest rate contracts        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Net derivative asset (liability) $ 292,000,000 $ 500,000,000    
Recurring | Level 3 | Interest rate contracts | Minimum | Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Correlation (IR/IR) 15.00% 15.00%    
Correlation (FX/IR) 0.00% 0.00%    
Illiquid IR and long-dated inflation rates (13.00%) (12.00%)    
Long-dated inflation volatilities 0.00% 0.00%    
Recurring | Level 3 | Interest rate contracts | Maximum | Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Correlation (IR/IR) 99.00% 99.00%    
Correlation (FX/IR) 40.00% 40.00%    
Illiquid IR and long-dated inflation rates 30.00% 35.00%    
Long-dated inflation volatilities 2.00% 2.00%    
Recurring | Level 3 | Interest rate contracts | Weighted Average | Industry standard derivative pricing        
Fair Value Inputs [Abstract]        
Correlation (IR/IR) 59.00% 56.00%    
Correlation (FX/IR) 1.00% 2.00%    
Illiquid IR and long-dated inflation rates 3.00% 5.00%    
Long-dated inflation volatilities 1.00% 1.00%    
Recurring | Level 3 | Long-term debt        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Long-term debt $ (1,660,000,000) $ (1,514,000,000)    
Recurring | Level 3 | Mortgage trading loans, ABS and other MBS        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 1,200,000,000 1,200,000,000    
Recurring | Level 3 | Corporate securities, trading loans and other        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 2,000,000,000 2,800,000,000    
Recurring | Level 3 | Non-U.S. sovereign debt        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 527,000,000 510,000,000    
Recurring | Level 3 | Other taxable securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 579,000,000 594,000,000    
Recurring | Level 3 | Tax-exempt securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 520,000,000 542,000,000    
Recurring | Level 3 | Instruments backed by residential real estate assets        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 1,035,000,000 $ 1,066,000,000    
Recurring | Level 3 | Instruments backed by residential real estate assets | Minimum | Discounted cash flow, Market comparables        
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 | Instruments backed by residential real estate assets | Maximum | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Yield 35.00% 50.00%    
Prepayment speed 21.00% 27.00%    
Default rate 3.00% 3.00%    
Loss severity 54.00% 54.00%    
Recurring | Level 3 | Instruments backed by residential real estate assets | Weighted Average | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Yield 7.00% 7.00%    
Prepayment speed 12.00% 14.00%    
Default rate 2.00% 2.00%    
Loss severity 19.00% 18.00%    
Recurring | Level 3 | Instruments backed by residential real estate assets | Loans and leases        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 702,000,000 $ 718,000,000    
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 13,000,000 11,000,000    
Recurring | Level 3 | Instruments backed by residential real estate assets | Mortgage trading loans, ABS and other MBS | Trading Securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 320,000,000 337,000,000    
Recurring | Level 3 | Instruments backed by commercial real estate assets        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 364,000,000 $ 317,000,000    
Recurring | Level 3 | Instruments backed by commercial real estate assets | Minimum | Discounted cash flow, Market comparables        
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 | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Yield 25.00% 39.00%    
Price (in dollars per share) $ 100 $ 100    
Recurring | Level 3 | Instruments backed by commercial real estate assets | Weighted Average | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Yield 5.00% 11.00%    
Price (in dollars per share) $ 65 $ 65    
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   $ 86,000,000    
Recurring | Level 3 | Instruments backed by commercial real estate assets | Mortgage trading loans, ABS and other MBS        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 45,000,000 53,000,000    
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 319,000,000 178,000,000    
Recurring | Level 3 | Commercial loans, debt securities and other        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 3,836,000,000 $ 4,486,000,000    
Recurring | Level 3 | Commercial loans, debt securities and other | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Enterprise value/EBITDA multiple   34    
Recurring | Level 3 | Commercial loans, debt securities and other | Minimum | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Yield 0.00% 1.00%    
Prepayment speed 10.00% 5.00%    
Default rate 3.00% 3.00%    
Loss severity 0.00% 0.00%    
Price (in dollars per share) $ 0 $ 0    
Duration 0 years 0 years    
Recurring | Level 3 | Commercial loans, debt securities and other | Maximum | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Yield 29.00% 37.00%    
Prepayment speed 20.00% 20.00%    
Default rate 4.00% 4.00%    
Loss severity 40.00% 50.00%    
Price (in dollars per share) $ 292 $ 292    
Duration 4 years 5 years    
Recurring | Level 3 | Commercial loans, debt securities and other | Weighted Average | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Yield 16.00% 14.00%    
Prepayment speed 11.00% 19.00%    
Default rate 4.00% 4.00%    
Loss severity 30.00% 19.00%    
Price (in dollars per share) $ 72 $ 68    
Duration 2 years 3 years    
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    
Recurring | Level 3 | Commercial loans, debt securities and other | Loans Held-for-Sale        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 779,000,000 559,000,000    
Recurring | Level 3 | Commercial loans, debt securities and other | Mortgage trading loans, ABS and other MBS | Trading Securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 850,000,000 821,000,000    
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 1,680,000,000 2,565,000,000    
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 527,000,000 510,000,000    
Recurring | Level 3 | Commercial loans, debt securities and other | Other taxable securities | Available-for-sale Securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value   29,000,000    
Recurring | Level 3 | Auction rate securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 1,129,000,000 $ 1,141,000,000    
Recurring | Level 3 | Auction rate securities | Minimum | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Price (in dollars per share) $ 10 $ 10    
Recurring | Level 3 | Auction rate securities | Maximum | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Price (in dollars per share) 100 100    
Recurring | Level 3 | Auction rate securities | Weighted Average | Discounted cash flow, Market comparables        
Fair Value Inputs [Abstract]        
Price (in dollars per share) $ 94 $ 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 $ 30,000,000 $ 34,000,000    
Recurring | Level 3 | Auction rate securities | Other taxable securities | Available-for-sale Securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 579,000,000 565,000,000    
Recurring | Level 3 | Auction rate securities | Tax-exempt securities | Available-for-sale Securities        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value 520,000,000 542,000,000    
Recurring | Level 3 | MSRs        
Fair Value Inputs, Assets, Quantitative Information [Line Items]        
Assets, fair value $ 2,610,000,000 $ 2,747,000,000    
Recurring | Level 3 | MSRs | Minimum | Discounted cash flow, Stochastic recovery correlation model        
Fair Value Inputs [Abstract]        
Weighted-average life, fixed rate 0 years 0 years    
Weighted-average life, variable rate 0 years 0 years    
Option Adjusted Spread, fixed rate 9.00% 9.00%    
Option Adjusted Spread, variable rate 9.00% 9.00%    
Recurring | Level 3 | MSRs | Maximum | Discounted cash flow, Stochastic recovery correlation model        
Fair Value Inputs [Abstract]        
Weighted-average life, fixed rate 15 years 15 years    
Weighted-average life, variable rate 10 years 14 years    
Option Adjusted Spread, fixed rate 14.00% 14.00%    
Option Adjusted Spread, variable rate 15.00% 15.00%    
Recurring | Level 3 | MSRs | Weighted Average | Discounted cash flow, Stochastic recovery correlation model        
Fair Value Inputs [Abstract]        
Weighted-average life, fixed rate 6 years 6 years    
Weighted-average life, variable rate 3 years 4 years    
Option Adjusted Spread, fixed rate 10.00% 10.00%    
Option Adjusted Spread, variable rate 12.00% 12.00%