v2.4.0.6
Fair Value Disclosures (Quantitative Information about Recurring Level 3 Fair Value Measurements) (Details) (Recurring, USD $)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Level 3
Securities Sold under Agreements to Repurchase
Minimum
Dec. 31, 2012
Level 3
Securities Sold under Agreements to Repurchase
Maximum
Dec. 31, 2012
Level 3
Securities Sold under Agreements to Repurchase
Weighted Average
Dec. 31, 2012
Level 3
Securities Sold under Agreements to Repurchase
Discounted Cash Flow
Dec. 31, 2012
Level 3
Other Secured Financings
Minimum
Dec. 31, 2012
Level 3
Other Secured Financings
Maximum
Dec. 31, 2012
Level 3
Other Secured Financings
Weighted Average
Dec. 31, 2012
Level 3
Long-term Borrowings
Minimum
Dec. 31, 2012
Level 3
Long-term Borrowings
Maximum
Dec. 31, 2012
Level 3
Long-term Borrowings
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate Equities
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate Equities
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate Equities
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate Equities
Net Asset Value, Discounted Cash Flow, Comparable Pricing and Market Approach
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Commercial Mortgage-backed Securities
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Commercial Mortgage-backed Securities
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Commercial Mortgage-backed Securities
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Commercial Mortgage-backed Securities
Comparable Pricing
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Asset-backed Securities
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Asset-backed Securities
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Asset-backed Securities
Discounted Cash Flow
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Corporate Bonds
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Corporate Bonds
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Corporate Bonds
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Corporate Bonds
Comparable Pricing
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Collateralized Debt Obligations
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Collateralized Debt Obligations
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Collateralized Debt Obligations
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Collateralized Debt Obligations
Comparable Pricing and Correlation Model
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Loans and Lending Commitments
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Loans and Lending Commitments
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Loans and Lending Commitments
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Corporate and Other Debt
Loans and Lending Commitments
Corporate Loan Model, Option Model and Comparable Pricing
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Interest Rate Contracts
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Interest Rate Contracts
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Interest Rate Contracts
Discounted Cash Flow and Option Model
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Credit Contracts
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Credit Contracts
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Credit Contracts
Comparable Pricing and Correlation Model
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Foreign Exchange Contracts
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Foreign Exchange Contracts
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Foreign Exchange Contracts
Option Model
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Equity Contracts
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Equity Contracts
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Equity Contracts
Option Model
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Commodity Contracts
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Commodity Contracts
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Derivative and Other Contracts
Commodity Contracts
Option Model
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Principal Investments
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Principal Investments
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Principal Investments
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Principal Investments
Discounted Cash Flow and Market Approach
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Other Investments
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Other Investments
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Other Investments
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Other Investments
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Owned
Investments
Other Investments
Discounted Cash Flow and Market Approach
Dec. 31, 2012
Level 3
Financial Instruments Sold, Not yet Purchased
Other Secured Financings
Comparable Pricing and Discounted Cash Flow
Dec. 31, 2012
Level 3
Financial Instruments Sold, Not yet Purchased
Long-term Borrowings
Option Model
Dec. 31, 2012
Level 3
Financial Instruments Sold, Not yet Purchased
Corporate and Other Debt
Corporate Bonds
Minimum
Dec. 31, 2012
Level 3
Financial Instruments Sold, Not yet Purchased
Corporate and Other Debt
Corporate Bonds
Maximum
Dec. 31, 2012
Level 3
Financial Instruments Sold, Not yet Purchased
Corporate and Other Debt
Corporate Bonds
Weighted Average
Dec. 31, 2012
Level 3
Financial Instruments Sold, Not yet Purchased
Corporate and Other Debt
Corporate Bonds
Comparable Pricing
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]                                                                                                                                  
Assets $ 322,378 $ 317,744                           $ 288 [1]       $ 232     $ 109       $ 660       $ 1,951       $ 4,694     $ (82) [2]     $ 1,822 [3]     $ (359) [4],[5]     $ (1,144) [4],[6]     $ 709       $ 2,833 [1]         $ 486 [1]            
Liabilities $ 194,431 $ 189,586       $ 151                                                                                                           $ 406 $ 2,789       $ 177
Fair Value Inputs                                                                                                                                  
Comparable Bond Price             55.00% [7] 139.00% [7] 102.00%               46.00% [7] 100.00% [7] 76.00%         0.00% [7] 143.00% [7] 24.00%   15.00% [7] 88.00% [7] 59.00%   80.00% [7] 120.00% [7] 104.00%   5.00% [7] 98.00% [7]   0.00% [7] 80.00% [7]   5.00% [7] 98.00% [7]                                     0.00% [7] 150.00% [7] 50.00%  
Internal Rate of Return                                         21.00% [7] 21.00%                                                                                      
Credit Correlation                                                       15.00% [7] 45.00% [7] 40.00%                 14.00% [7] 94.00% [7]                                                  
Credit Spread                                                               0.17% [7] 10.04% [7] 2.81%                                                              
At the Money Volatility                   20.00% [7] 24.00% [7] 24.00%                                                                 7.00% [7] 24.00% [7]                                      
Comparable Loan Price                                                               55.00% [7] 100.00% [7] 88.00%                                                              
Discount to Net Asset Value                         0.00% [7] 37.00% [7] 8.00%                                                                                                    
Implied Weighted Average Cost of Capital                                                                                                     8.00% [7] 15.00% [7] 9.00%   11.00% [7]     11.00%              
Discount to Comparable Equity Price                         0.00% [7] 27.00% [7] 14.00%                                                                                                    
EBITDA Multiple                           6 [7] 6                                                                       3 [7] 17 [7] 10     6 [7] 8 [7] 7              
Interest Rate Volatility Concentration Liquidity Multiple                                                                       0 [7] 8 [7]                                                        
Interest Rate Volatility Skew                                                                       9.00% [7] 95.00% [7]         9.00% [7] 95.00% [7]                                            
Cash Synthetic Basis                                                                             2.00% [7] 14.00% [7]                                                  
Interest Rate Quanto Correlation                                                                       (53.00%) [7] 33.00% [7]         (53.00%) [7] 33.00% [7]                                            
Interest Rate - Credit Spread Correlation                                                                                   (59.00%) [7] 65.00% [7]                                            
Interest Rate - Foreign Exchange Correlation                                                                       2.00% [7] 63.00% [7]         2.00% [7] 63.00% [7]                                            
Volatility Skew                   (1.00%) [7] 0.00% [7] 0.00%                                                                 (2.00%) [7] 0.00% [7]                                      
Equity - Equity Correlation                   50.00% [7] 90.00% [7] 77.00%                                                                 40.00% [7] 96.00% [7]                                      
Equity - Foreign Exchange Correlation                   (70.00%) [7] 36.00% [7] (15.00%)                                                                 (70.00%) [7] 38.00% [7]                                      
Equity - Interest Rate Correlation                                                                                         18.00% [7] 65.00% [7]                                      
Forward Power Price (per megawatt hour)                                                                                               28 [7] 84 [7]                                
Commodity Volatility                                                                                               17.00% [7] 29.00% [7]                                
Cross Commodity Correlation                                                                                               43.00% [7] 97.00% [7]                                
Exit Multiple                                                                                                     5 [7] 10 [7] 9       6 [7] 6              
Funding Spread     1.10% [7] 1.84% [7] 1.66%   1.83% [7] 1.86% [7] 1.84%                                                                                                                
Inflation Volatility                                                                       49.00% [7] 100.00% [7]                                                        
Forward Commercial Paper Rate - LIBOR Basis                                                                       (0.18%) [7] 0.95% [7]                                                        
Interest Rate Curve Correlation                                                                       48.00% [7] 99.00% [7]                                                        
Capitalization Rate                                                                                                     6.00% [7] 10.00% [7] 7.00%                        
Equity Discount Rate                                                                                                     15.00% [7] 35.00% [7] 23.00%                        
[1] Investments in funds measured using an unadjusted net asset value are excluded.
[2] See below for a qualitative discussion of the wide unobservable input ranges for comparable bond prices, interest rate volatility skew, interest rate quanto correlation and forward commercial paper rate–LIBOR basis.
[3] See below for a qualitative discussion of the wide unobservable input ranges for comparable bond prices and credit correlation.
[4] Includes derivative contracts with multiple risks (i.e., hybrid products).
[5] See below for a qualitative discussion of the wide unobservable input ranges for comparable bond prices, interest rate quanto correlation, interest rate-credit spread correlation and interest rate volatility skew.
[6] See below for a qualitative discussion of the wide unobservable input range for equity-foreign exchange correlation.
[7] The ranges of significant unobservable inputs are represented in points, percentages, basis points, times or megawatt hours. Points are a percentage of par; for example, 100 points would be 100% of par. A basis point equals 1/100th of 1%; for example, 1,004 basis points would equal 10.04%.