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Fair Values - Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements (Details)
$ in Millions
Mar. 31, 2024
USD ($)
$ / MWh
Dec. 31, 2023
USD ($)
$ / MWh
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets $ 37,432 $ 37,313
Deposits 6,429 6,472
Securities sold under agreements to repurchase 827 1,020
Other secured financings 15,091 12,655
Borrowings 95,104 93,900
Recurring    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings 95,104 93,900
Recurring | Loans and lending commitments    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets 9,925 8,188
Nonrecurring    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans 7,579 8,747
Level 3 | Recurring    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Corporate equities 268 199
Investments 970 949
Derivative assets 3,980 3,513
Deposits 51 33
Securities sold under agreements to repurchase 460 449
Other secured financings 74 92
Borrowings $ 2,027 $ 1,878
Level 3 | Recurring | Comparable Pricing | Equity Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Corporate equities, measurement input value 1 1
Level 3 | Recurring | Market Approach | EBITDA Multiple    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 21  
Level 3 | Recurring | Other sovereign government obligations    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets $ 64 $ 94
Level 3 | Recurring | State and municipal securities    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets 102 34
Level 3 | Recurring | MABS    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets 457 489
Level 3 | Recurring | Loans and lending commitments    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets 1,895 2,066
Level 3 | Recurring | Corporate and other debt    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets 2,042 1,983
Level 3 | Recurring | Interest rate    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets 48 (73)
Level 3 | Recurring | Credit    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets $ 127 $ 96
Level 3 | Recurring | Credit | Credit Default Swap Model | Cash-Synthetic Basis    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0007 0.0007
Level 3 | Recurring | Foreign exchange    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets $ 20 $ (365)
Level 3 | Recurring | Equity    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets (989) (1,102)
Level 3 | Recurring | Commodity and other    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets $ 1,210 $ 1,290
Level 3 | Recurring | Minimum | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Other secured financings, measurement input value 0.0022 0.0022
Level 3 | Recurring | Minimum | Comparable Pricing | Equity Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 0.24 0.24
Level 3 | Recurring | Minimum | Discounted Cash Flow | WACC    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 0.09 0.16
Level 3 | Recurring | Minimum | Discounted Cash Flow | Exit Multiple    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 9 9
Level 3 | Recurring | Minimum | Discounted Cash Flow | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Funding spread 0.0006 0.0028
Level 3 | Recurring | Minimum | Option Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.0328  
Level 3 | Recurring | Minimum | Option Model | Equity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Deposits, measurement input value 0.07  
Borrowings, measurement input value 0.04 0.06
Level 3 | Recurring | Minimum | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.60 0.50
Level 3 | Recurring | Minimum | Option Model | Equity Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value (0.01) (0.02)
Level 3 | Recurring | Minimum | Option Model | Equity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.25 0.41
Level 3 | Recurring | Minimum | Option Model | Equity - FX Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value (0.60) (0.65)
Level 3 | Recurring | Minimum | Other sovereign government obligations | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.62 0.61
Level 3 | Recurring | Minimum | State and municipal securities | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.99  
Level 3 | Recurring | Minimum | MABS | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0 0
Level 3 | Recurring | Minimum | Loans and lending commitments | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.84 0.85
Level 3 | Recurring | Minimum | Loans and lending commitments | Margin Loan Model | Margin Loan Rate    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.02 0.02
Level 3 | Recurring | Minimum | Corporate and other debt | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.28 0.28
Level 3 | Recurring | Minimum | Corporate and other debt | Discounted Cash Flow | Loss Given Default    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.54 0.54
Borrowings, measurement input value 0.54 0.54
Level 3 | Recurring | Minimum | Interest rate | Option Model | IR Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.69 0.70
Level 3 | Recurring | Minimum | Interest rate | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.70 0.49
Level 3 | Recurring | Minimum | Interest rate | Option Model | Bond Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 1 0.79
Level 3 | Recurring | Minimum | Interest rate | Option Model | Inflation Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.29 0.27
Level 3 | Recurring | Minimum | Credit | Credit Default Swap Model | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0 0
Level 3 | Recurring | Minimum | Credit | Credit Default Swap Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0010 0.0010
Level 3 | Recurring | Minimum | Credit | Credit Default Swap Model | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0018 0.0018
Level 3 | Recurring | Minimum | Foreign exchange | Option Model | IR Curve    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value (0.01) (0.04)
Level 3 | Recurring | Minimum | Foreign exchange | Option Model | Foreign Exchange Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value   (0.03)
Level 3 | Recurring | Minimum | Foreign exchange | Option Model | Contingency Probability    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.70 0.95
Level 3 | Recurring | Minimum | Equity | Option Model | Equity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.06 0.06
Level 3 | Recurring | Minimum | Equity | Option Model | Equity Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value (0.01) (0.01)
Level 3 | Recurring | Minimum | Equity | Option Model | Equity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.25 0.25
Level 3 | Recurring | Minimum | Equity | Option Model | FX Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value (0.74) (0.79)
Level 3 | Recurring | Minimum | Equity | Option Model | IR Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.13 0.10
Level 3 | Recurring | Minimum | Commodity and other | Option Model | Forward Power Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value | $ / MWh 0 0
Level 3 | Recurring | Minimum | Commodity and other | Option Model | Commodity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.10 0.08
Level 3 | Recurring | Minimum | Commodity and other | Option Model | Cross-Commodity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.54 0.54
Level 3 | Recurring | Maximum | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Other secured financings, measurement input value 0.0101 0.0101
Level 3 | Recurring | Maximum | Comparable Pricing | Equity Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 1 1
Level 3 | Recurring | Maximum | Discounted Cash Flow | WACC    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 0.17 0.18
Level 3 | Recurring | Maximum | Discounted Cash Flow | Exit Multiple    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 10 17
Level 3 | Recurring | Maximum | Discounted Cash Flow | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Funding spread 0.0134 0.0135
Level 3 | Recurring | Maximum | Option Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.0480  
Level 3 | Recurring | Maximum | Option Model | Equity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Deposits, measurement input value 0.13  
Borrowings, measurement input value 0.70 0.69
Level 3 | Recurring | Maximum | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.99 0.89
Level 3 | Recurring | Maximum | Option Model | Equity Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0 0
Level 3 | Recurring | Maximum | Option Model | Equity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.98 0.97
Level 3 | Recurring | Maximum | Option Model | Equity - FX Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.40 0.40
Level 3 | Recurring | Maximum | Other sovereign government obligations | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 1.16 1.10
Level 3 | Recurring | Maximum | State and municipal securities | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 1  
Level 3 | Recurring | Maximum | MABS | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.88 0.88
Level 3 | Recurring | Maximum | Loans and lending commitments | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 1.01 1.02
Level 3 | Recurring | Maximum | Loans and lending commitments | Margin Loan Model | Margin Loan Rate    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.04 0.04
Level 3 | Recurring | Maximum | Corporate and other debt | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 1.30 1.35
Level 3 | Recurring | Maximum | Corporate and other debt | Discounted Cash Flow | Loss Given Default    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.84 0.84
Borrowings, measurement input value 0.84 0.84
Level 3 | Recurring | Maximum | Interest rate | Option Model | IR Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.87 1
Level 3 | Recurring | Maximum | Interest rate | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.87 0.99
Level 3 | Recurring | Maximum | Interest rate | Option Model | Bond Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 1.10 0.85
Level 3 | Recurring | Maximum | Interest rate | Option Model | Inflation Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.70 0.70
Level 3 | Recurring | Maximum | Credit | Credit Default Swap Model | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0092 0.0092
Level 3 | Recurring | Maximum | Credit | Credit Default Swap Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0365 0.0404
Level 3 | Recurring | Maximum | Credit | Credit Default Swap Model | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0590 0.0590
Level 3 | Recurring | Maximum | Foreign exchange | Option Model | IR Curve    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.14 0.26
Level 3 | Recurring | Maximum | Foreign exchange | Option Model | Foreign Exchange Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value   0.12
Level 3 | Recurring | Maximum | Foreign exchange | Option Model | Contingency Probability    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.95  
Level 3 | Recurring | Maximum | Equity | Option Model | Equity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.92 0.97
Level 3 | Recurring | Maximum | Equity | Option Model | Equity Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0 0
Level 3 | Recurring | Maximum | Equity | Option Model | Equity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.99 0.97
Level 3 | Recurring | Maximum | Equity | Option Model | FX Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.50 0.40
Level 3 | Recurring | Maximum | Equity | Option Model | IR Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.30 0.30
Level 3 | Recurring | Maximum | Commodity and other | Option Model | Forward Power Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value | $ / MWh 186 220
Level 3 | Recurring | Maximum | Commodity and other | Option Model | Commodity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 1.15 1.23
Level 3 | Recurring | Maximum | Commodity and other | Option Model | Cross-Commodity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 1 1
Level 3 | Recurring | Weighted Average | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Other secured financings, measurement input value 0.0073 0.0076
Level 3 | Recurring | Weighted Average | Comparable Pricing | Equity Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 0.85 0.86
Level 3 | Recurring | Weighted Average | Discounted Cash Flow | WACC    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 0.12 0.17
Level 3 | Recurring | Weighted Average | Discounted Cash Flow | Exit Multiple    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value 10 15
Level 3 | Recurring | Weighted Average | Discounted Cash Flow | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Funding spread   0.0079
Level 3 | Recurring | Weighted Average | Market Approach | EBITDA Multiple    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Investments, measurement input value   22
Level 3 | Recurring | Weighted Average | Option Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.0404  
Level 3 | Recurring | Weighted Average | Option Model | Equity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Deposits, measurement input value 0.07  
Borrowings, measurement input value 0.14 0.13
Level 3 | Recurring | Weighted Average | Option Model | Equity Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0 0
Level 3 | Recurring | Weighted Average | Option Model | Equity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.61 0.79
Level 3 | Recurring | Weighted Average | Option Model | Equity - FX Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value (0.33) (0.30)
Level 3 | Recurring | Weighted Average | Other sovereign government obligations | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.87 0.87
Level 3 | Recurring | Weighted Average | State and municipal securities | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 1  
Level 3 | Recurring | Weighted Average | MABS | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.60 0.61
Level 3 | Recurring | Weighted Average | Loans and lending commitments | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.97 0.98
Level 3 | Recurring | Weighted Average | Loans and lending commitments | Margin Loan Model | Margin Loan Rate    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.03 0.03
Level 3 | Recurring | Weighted Average | Corporate and other debt | Comparable Pricing | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.85 0.82
Level 3 | Recurring | Weighted Average | Credit | Credit Default Swap Model | Bond Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0047 0.0046
Level 3 | Recurring | Weighted Average | Credit | Credit Default Swap Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0096 0.0094
Level 3 | Recurring | Weighted Average | Credit | Credit Default Swap Model | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.0071 0.0067
Level 3 | Recurring | Weighted Average | Equity | Option Model | Equity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.19 0.23
Level 3 | Recurring | Weighted Average | Equity | Option Model | Equity Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value (0.01) 0
Level 3 | Recurring | Weighted Average | Equity | Option Model | Equity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.59 0.49
Level 3 | Recurring | Weighted Average | Equity | Option Model | FX Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value (0.19) (0.28)
Level 3 | Recurring | Weighted Average | Equity | Option Model | IR Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.14  
Level 3 | Recurring | Weighted Average | Commodity and other | Option Model | Forward Power Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value | $ / MWh 48 49
Level 3 | Recurring | Weighted Average | Commodity and other | Option Model | Commodity Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.31 0.31
Level 3 | Recurring | Weighted Average | Commodity and other | Option Model | Cross-Commodity Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.94 0.94
Level 3 | Recurring | Average | Discounted Cash Flow | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Funding spread 0.0042  
Level 3 | Recurring | Average | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.88 0.71
Level 3 | Recurring | Average | Corporate and other debt | Discounted Cash Flow | Loss Given Default    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.62 0.62
Borrowings, measurement input value 0.62 0.62
Level 3 | Recurring | Average | Interest rate | Option Model | IR Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.75 0.81
Level 3 | Recurring | Average | Interest rate | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.83 0.77
Level 3 | Recurring | Average | Interest rate | Option Model | Bond Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 1.06 0.82
Level 3 | Recurring | Average | Interest rate | Option Model | Inflation Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.43 0.43
Level 3 | Recurring | Average | Foreign exchange | Option Model | IR Curve    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.05 0.07
Level 3 | Recurring | Average | Foreign exchange | Option Model | Foreign Exchange Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value   0.02
Level 3 | Recurring | Average | Foreign exchange | Option Model | Contingency Probability    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.90  
Level 3 | Recurring | Average | Equity | Option Model | IR Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value   0.15
Level 3 | Recurring | Median | Discounted Cash Flow | Funding Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Funding spread 0.0030  
Level 3 | Recurring | Median | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Borrowings, measurement input value 0.92 0.70
Level 3 | Recurring | Median | Corporate and other debt | Discounted Cash Flow | Loss Given Default    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Debt securities, trading assets, measurement input value 0.54 0.54
Borrowings, measurement input value 0.54 0.54
Level 3 | Recurring | Median | Interest rate | Option Model | IR Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.70 0.93
Level 3 | Recurring | Median | Interest rate | Option Model | IR Curve Correlation    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.85 0.79
Level 3 | Recurring | Median | Interest rate | Option Model | Bond Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 1.10 0.85
Level 3 | Recurring | Median | Interest rate | Option Model | Inflation Volatility    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.39 0.39
Level 3 | Recurring | Median | Foreign exchange | Option Model | IR Curve    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.04 0.05
Level 3 | Recurring | Median | Foreign exchange | Option Model | Foreign Exchange Volatility Skew    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value   0
Level 3 | Recurring | Median | Foreign exchange | Option Model | Contingency Probability    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Derivative assets, measurement input value 0.95  
Level 3 | Nonrecurring    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans $ 5,119 $ 4,532
Level 3 | Nonrecurring | Minimum | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.0042 0.0025
Level 3 | Nonrecurring | Minimum | Corporate Loan Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.0110 0.0099
Level 3 | Nonrecurring | Minimum | Warehouse Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.0110 0.0115
Level 3 | Nonrecurring | Maximum | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.0100 0.0093
Level 3 | Nonrecurring | Maximum | Corporate Loan Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.1890 0.1467
Level 3 | Nonrecurring | Maximum | Warehouse Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.0275 0.0268
Level 3 | Nonrecurring | Weighted Average | Comparable Pricing | Loan Price    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.0086 0.0070
Level 3 | Nonrecurring | Weighted Average | Corporate Loan Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.1053 0.1015
Level 3 | Nonrecurring | Weighted Average | Warehouse Model | Credit Spread    
Valuation Techniques and Sensitivity of Unobservable Inputs Used in Level 3 Fair Value Measurements    
Loans, measurement input value 0.0162 0.0185