Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Recurring Fair Value Inputs (Details)

v3.21.1
Fair Value Measurements - Recurring Fair Value Inputs (Details)
3 Months Ended
Mar. 31, 2021
USD ($)
$ / security
$ / MMBTU
Mar. 31, 2020
Dec. 31, 2020
USD ($)
$ / security
$ / MMBTU
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, primarily auction rate securities $ 17,212,000,000   $ 15,718,000,000
Long-term debt (30,514,000,000)   (32,200,000,000)
Recurring      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, primarily auction rate securities 17,212,000,000   15,718,000,000
MSRs 1,200,000,000   1,000,000,000.0
Long-term debt (30,514,000,000)   (32,200,000,000)
Recurring | Level 3      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by residential real estate assets 1,403,000,000   1,543,000,000
Instruments backed by commercial real estate assets 481,000,000   407,000,000
Commercial loans, debt securities and other 3,268,000,000   3,066,000,000
Other assets, primarily auction rate securities 2,090,000,000   1,970,000,000
MSRs 1,154,000,000   1,033,000,000
Long-term debt (1,028,000,000)   (1,164,000,000)
Net derivative asset (liability) $ (3,206,000,000)   $ (3,468,000,000)
Recurring | Level 3 | Yield | Minimum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0   (0.03)
Commercial loans, debt securities and other 0   0
Recurring | Level 3 | Yield | Minimum | Discounted cash flow      
Fair Value Inputs [Abstract]      
Instruments backed by commercial real estate assets 0   0
Recurring | Level 3 | Yield | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0   0
Recurring | Level 3 | Yield | Maximum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.25   0.25
Commercial loans, debt securities and other 0.25   0.26
Recurring | Level 3 | Yield | Maximum | Discounted cash flow      
Fair Value Inputs [Abstract]      
Instruments backed by commercial real estate assets 0.25   0.25
Recurring | Level 3 | Yield | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.13   0.11
Recurring | Level 3 | Yield | Weighted Average | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.07   0.06
Commercial loans, debt securities and other 0.09   0.09
Recurring | Level 3 | Yield | Weighted Average | Discounted cash flow      
Fair Value Inputs [Abstract]      
Instruments backed by commercial real estate assets 0.04   0.04
Recurring | Level 3 | Yield | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.11   0.09
Recurring | Level 3 | Prepayment speed | Minimum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.07   0.01
Commercial loans, debt securities and other 0.10   0.10
Recurring | Level 3 | Prepayment speed | Maximum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.35   0.56
Commercial loans, debt securities and other 0.20   0.20
Recurring | Level 3 | Prepayment speed | Weighted Average | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.16   0.20
Commercial loans, debt securities and other 0.13   0.14
Recurring | Level 3 | Default rate | Minimum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0   0
Commercial loans, debt securities and other 0.03   0.03
Recurring | Level 3 | Default rate | Maximum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.03   0.03
Commercial loans, debt securities and other 0.04   0.04
Recurring | Level 3 | Default rate | Weighted Average | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.01   0.01
Commercial loans, debt securities and other 0.04   0.04
Recurring | Level 3 | Price | Minimum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets | $ / security 0   0
Commercial loans, debt securities and other 0   0
Other assets, primarily auction rate securities | $ / security 10   10
Recurring | Level 3 | Price | Minimum | Discounted cash flow      
Fair Value Inputs [Abstract]      
Instruments backed by commercial real estate assets | $ / security 0   0
Recurring | Level 3 | Price | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt | $ / security 0   0
Recurring | Level 3 | Price | Maximum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets | $ / security 152   168
Commercial loans, debt securities and other 170   142
Other assets, primarily auction rate securities | $ / security 97   97
Recurring | Level 3 | Price | Maximum | Discounted cash flow      
Fair Value Inputs [Abstract]      
Instruments backed by commercial real estate assets | $ / security 101   100
Recurring | Level 3 | Price | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt | $ / security 120   124
Recurring | Level 3 | Price | Weighted Average | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets | $ / security 96   110
Commercial loans, debt securities and other | $ / security 67   66
Other assets, primarily auction rate securities | $ / security 94   91
Recurring | Level 3 | Price | Weighted Average | Discounted cash flow      
Fair Value Inputs [Abstract]      
Instruments backed by commercial real estate assets | $ / security 62   52
Recurring | Level 3 | Price | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt | $ / security 84   86
Recurring | Level 3 | Loss severity | Minimum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.14   0
Commercial loans, debt securities and other 0.35   0.35
Recurring | Level 3 | Loss severity | Maximum | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.37   0.47
Commercial loans, debt securities and other 0.40   0.40
Recurring | Level 3 | Loss severity | Weighted Average | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Instruments backed by residential real estate assets 0.15   0.18
Commercial loans, debt securities and other 0.38   0.38
Recurring | Level 3 | Discount rate | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Other assets, primarily auction rate securities 0.09   0.08
Recurring | Level 3 | Weighted-Average Life, Fixed Rate | Minimum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0 years 0 years  
Recurring | Level 3 | Weighted-Average Life, Fixed Rate | Maximum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 14 years 13 years  
Recurring | Level 3 | Weighted-Average Life, Fixed Rate | Weighted Average | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 5 years 4 years  
Recurring | Level 3 | Weighted-Average Life, Variable Rate | Minimum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0 years 0 years  
Recurring | Level 3 | Weighted-Average Life, Variable Rate | Maximum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 10 years 10 years  
Recurring | Level 3 | Weighted-Average Life, Variable Rate | Weighted Average | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 3 years 3 years  
Recurring | Level 3 | Option-adjusted spread, fixed rate | Minimum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0.07   0.07
Recurring | Level 3 | Option-adjusted spread, fixed rate | Maximum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0.14   0.14
Recurring | Level 3 | Option-adjusted spread, fixed rate | Weighted Average | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0.09   0.09
Recurring | Level 3 | Option-adjusted spread, variable rate | Minimum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0.09   0.09
Recurring | Level 3 | Option-adjusted spread, variable rate | Maximum | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0.15   0.15
Recurring | Level 3 | Option-adjusted spread, variable rate | Weighted Average | Discounted cash flow      
Fair Value Inputs [Abstract]      
MSRs 0.12   0.12
Recurring | Level 3 | Equity correlation | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.02   0.02
Recurring | Level 3 | Equity correlation | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.99   1
Recurring | Level 3 | Equity correlation | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.72   0.64
Recurring | Level 3 | Long-dated equity volatilities | Discounted cash flow, Market comparables      
Fair Value Inputs [Abstract]      
Commercial loans, debt securities and other 0.50   0.77
Recurring | Level 3 | Long-dated equity volatilities | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.04   0.07
Recurring | Level 3 | Long-dated equity volatilities | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.64   0.64
Recurring | Level 3 | Long-dated equity volatilities | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt 0.35   0.32
Recurring | Level 3 | Natural gas forward price | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt | $ / MMBTU 1   1
Recurring | Level 3 | Natural gas forward price | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt | $ / MMBTU 5   4
Recurring | Level 3 | Natural gas forward price | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Long-term debt | $ / MMBTU 3   3
Recurring | Level 3 | Credit derivatives      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Net derivative asset (liability) $ (39,000,000)   $ (112,000,000)
Recurring | Level 3 | Credit derivatives | Yield | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.05   0.05
Recurring | Level 3 | Credit derivatives | Prepayment speed | Minimum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.15   0.15
Recurring | Level 3 | Credit derivatives | Prepayment speed | Maximum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 1   1
Recurring | Level 3 | Credit derivatives | Prepayment speed | Weighted Average | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.17   0.22
Recurring | Level 3 | Credit derivatives | Default rate | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.02   0.02
Recurring | Level 3 | Credit derivatives | Price | Minimum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) | $ / security 0   0
Recurring | Level 3 | Credit derivatives | Price | Maximum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) | $ / security 122   122
Recurring | Level 3 | Credit derivatives | Price | Weighted Average | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) | $ / security 62   69
Recurring | Level 3 | Credit derivatives | Credit spreads | Minimum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0    
Recurring | Level 3 | Credit derivatives | Credit spreads | Maximum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.0191    
Recurring | Level 3 | Credit derivatives | Credit spreads | Weighted Average | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.0065    
Recurring | Level 3 | Credit derivatives | Upfront points | Minimum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.0016   0
Recurring | Level 3 | Credit derivatives | Upfront points | Maximum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.0100   0.0100
Recurring | Level 3 | Credit derivatives | Upfront points | Weighted Average | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.0074   0.0075
Recurring | Level 3 | Credit derivatives | Credit correlation | Minimum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.20   0.21
Recurring | Level 3 | Credit derivatives | Credit correlation | Maximum | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.22   0.64
Recurring | Level 3 | Credit derivatives | Credit correlation | Weighted Average | Discounted cash flow, Stochastic recovery correlation model      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.21   0.57
Recurring | Level 3 | Equity contracts      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Net derivative asset (liability) $ (1,924,000,000)   $ (1,904,000,000)
Recurring | Level 3 | Equity contracts | Equity correlation | Minimum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.02   0.02
Recurring | Level 3 | Equity contracts | Equity correlation | Maximum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.99   1
Recurring | Level 3 | Equity contracts | Equity correlation | Weighted Average | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.72   0.64
Recurring | Level 3 | Equity contracts | Long-dated equity volatilities | Minimum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.04   0.07
Recurring | Level 3 | Equity contracts | Long-dated equity volatilities | Maximum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.64   0.64
Recurring | Level 3 | Equity contracts | Long-dated equity volatilities | Weighted Average | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.35   0.32
Recurring | Level 3 | Commodity contracts      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Net derivative asset (liability) $ (1,278,000,000)   $ (1,426,000,000)
Recurring | Level 3 | Commodity contracts | Natural gas forward price | Minimum | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 1   1
Recurring | Level 3 | Commodity contracts | Natural gas forward price | Maximum | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 5   4
Recurring | Level 3 | Commodity contracts | Natural gas forward price | Weighted Average | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 3   3
Recurring | Level 3 | Commodity contracts | Correlation | Minimum | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.39   0.39
Recurring | Level 3 | Commodity contracts | Correlation | Maximum | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.79   0.85
Recurring | Level 3 | Commodity contracts | Correlation | Weighted Average | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.69   0.73
Recurring | Level 3 | Commodity contracts | Volatilities | Minimum | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.24   0.23
Recurring | Level 3 | Commodity contracts | Volatilities | Maximum | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.47   0.70
Recurring | Level 3 | Commodity contracts | Volatilities | Weighted Average | Discounted cash flow, Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.32   0.39
Recurring | Level 3 | Interest rate contracts      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Net derivative asset (liability) $ 35,000,000   $ (26,000,000)
Recurring | Level 3 | Interest rate contracts | Correlation (IR/IR) | Minimum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.15   0.15
Recurring | Level 3 | Interest rate contracts | Correlation (IR/IR) | Maximum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.90   0.96
Recurring | Level 3 | Interest rate contracts | Correlation (IR/IR) | Weighted Average | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.44   0.34
Recurring | Level 3 | Interest rate contracts | Correlation (FX/IR) | Minimum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0   0
Recurring | Level 3 | Interest rate contracts | Correlation (FX/IR) | Maximum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.46   0.46
Recurring | Level 3 | Interest rate contracts | Correlation (FX/IR) | Weighted Average | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.04   0.03
Recurring | Level 3 | Interest rate contracts | Long-dated inflation rates | Minimum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) (0.03)   (0.07)
Recurring | Level 3 | Interest rate contracts | Long-dated inflation rates | Maximum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.36   0.84
Recurring | Level 3 | Interest rate contracts | Long-dated inflation rates | Weighted Average | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.07   0.14
Recurring | Level 3 | Interest rate contracts | Long-dated inflation volatilities | Minimum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0   0
Recurring | Level 3 | Interest rate contracts | Long-dated inflation volatilities | Maximum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.01   0.01
Recurring | Level 3 | Interest rate contracts | Long-dated inflation volatilities | Weighted Average | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.01   0.01
Recurring | Level 3 | Interest rate contracts | Interest rate volatilities | Minimum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0   0
Recurring | Level 3 | Interest rate contracts | Interest rate volatilities | Maximum | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.02   0.02
Recurring | Level 3 | Interest rate contracts | Interest rate volatilities | Weighted Average | Industry standard derivative pricing      
Fair Value Inputs [Abstract]      
Net derivative assets (liabilities) 0.01   0.01
Recurring | Level 3 | Mortgage trading loans, MBS and ABS      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by residential real estate assets $ 433,000,000   $ 467,000,000
Instruments backed by commercial real estate assets 61,000,000   43,000,000
Commercial loans, debt securities and other 1,067,000,000   930,000,000
Fair Value Inputs [Abstract]      
Loans and securities, fair value 1,600,000,000   1,400,000,000
Recurring | Level 3 | Loans and leases      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by residential real estate assets 426,000,000   431,000,000
Commercial loans, debt securities and other 367,000,000   286,000,000
Fair Value Inputs [Abstract]      
Loans and securities, fair value 793,000,000   717,000,000
Recurring | Level 3 | AFS debt securities – Non-agency residential      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by residential real estate assets 284,000,000   378,000,000
Fair Value Inputs [Abstract]      
Loans and securities, fair value 468,000,000   643,000,000
Recurring | Level 3 | Other debt securities carried at fair value – Non-agency residential      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by residential real estate assets 260,000,000   267,000,000
Fair Value Inputs [Abstract]      
Loans and securities, fair value 260,000,000   267,000,000
Recurring | Level 3 | Corporate securities, trading loans and other      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by commercial real estate assets 326,000,000   262,000,000
Commercial loans, debt securities and other 1,190,000,000   1,097,000,000
Fair Value Inputs [Abstract]      
Loans and securities, fair value 1,500,000,000   1,400,000,000
Recurring | Level 3 | AFS debt securities, primarily other taxable securities      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by commercial real estate assets 86,000,000   89,000,000
Recurring | Level 3 | Loans held-for-sale      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Instruments backed by commercial real estate assets 8,000,000   13,000,000
Commercial loans, debt securities and other 212,000,000   223,000,000
Fair Value Inputs [Abstract]      
Loans and securities, fair value 220,000,000   236,000,000
Recurring | Level 3 | Non-U.S. sovereign debt      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Commercial loans, debt securities and other 334,000,000   354,000,000
Fair Value Inputs [Abstract]      
Loans and securities, fair value 334,000,000   354,000,000
Recurring | Level 3 | Tax-exempt securities      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Commercial loans, debt securities and other 98,000,000   176,000,000
Recurring | Level 3 | Other assets, primarily auction rate securities      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, primarily auction rate securities 936,000,000   937,000,000
Recurring | Level 3 | Other Assets      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, primarily auction rate securities $ 2,100,000,000   $ 2,000,000,000.0