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FAIR VALUE DISCLOSURES (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Fair Value Measurements Not Included In Quantitative Information About Level 3 Fair Value Measurements $ 865 $ 1,045 $ 865 $ 1,045
Fair Value Measurements Not Included In Quantitative Information Percentage Of Total Assets Classified As Level 3 63.10% 68.80% 63.10% 68.80%
Fair Value Measurements Not Included In Quantitative Information Percentage Of Total Assets Measured At Fair Value On Recurring Basis 0.60% 0.70% 0.60% 0.70%
Business combination, contingent consideration, liability $ 31 $ 42 $ 31 $ 42
Projected AUM growth rate     46.00%  
Revenue growth rate     43.00%  
Discount rate       3.00%
Business combination, changes in estimate of consideration payable 7 4    
Public corporate | Matrix Pricing Model Valuation Technique | Private corporate        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Percentage Of Level 3 Asset Fair Value     51.20% 54.40%
Fair Value Unabsorvable Inputs 215 207 $ 215 $ 207
Asset-backed Securities        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Fair Value Unabsorvable Inputs 7 8 $ 7 $ 8
Asset-backed Securities | Matrix Pricing Model Valuation Technique        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Percentage Of Level 3 Asset Fair Value     7.50% 9.40%
Other equity investments | Private Venture Capital Fund Of Fund        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Fair Value Unabsorvable Inputs 32 31 $ 32 $ 31
Partnership Unfunded Committments 3 3 3 3
Separate Accounts        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Fair Value Unabsorvable Inputs 28 11 28 11
Separate Accounts | Discounted Cash Flow Valuation Technique | Private Equity Funds        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Fair Value Unabsorvable Inputs 2 2 2 2
Separate Accounts | Discounted Cash Flow Valuation Technique | Mortgage loans on real estate        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Fair Value Unabsorvable Inputs 5 5 5 5
Separate Accounts | Third Party Appraisal And Discounted Cash Flow Valuation Technique | Private Real Estate Fund        
Fair Value Inputs Assets Quantitative Information 1 [Line Items]        
Fair Value Unabsorvable Inputs $ 271 $ 234 $ 271 $ 234