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FAIR VALUE DISCLOSURES (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Fair Value Inputs Assets Quantitative Information 1 [Line Items]    
Fair Value Measurements Not Included In Quantitative Information About Level 3 Fair Value Measurements $ 594 $ 865
Fair Value Measurements Not Included In Quantitative Information Percentage Of Total Assets Classified As Level 3 37.50% 63.10%
Fair Value Measurements Not Included In Quantitative Information Percentage Of Total Assets Measured At Fair Value On Recurring Basis 0.40% 0.60%
Business combination, contingent consideration, liability $ 18 $ 31
Projected AUM growth rate 18.00% 46.00%
Revenue growth rate   43.00%
Discount rate   3.00%
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 81.80% 51.20%
Fair Value Unabsorvable Inputs, Asset $ 691 $ 215
Asset-backed Securities    
Fair Value Inputs Assets Quantitative Information 1 [Line Items]    
Fair Value Unabsorvable Inputs, Asset $ 3 $ 7
Asset-backed Securities | Matrix Pricing Model Valuation Technique    
Fair Value Inputs Assets Quantitative Information 1 [Line Items]    
Percentage Of Level 3 Asset Fair Value 8.30% 7.50%
Separate Accounts    
Fair Value Inputs Assets Quantitative Information 1 [Line Items]    
Fair Value Unabsorvable Inputs, Asset $ 12 $ 28
Separate Accounts | Discounted Cash Flow Valuation Technique | Private Equity Funds    
Fair Value Inputs Assets Quantitative Information 1 [Line Items]    
Fair Value Unabsorvable Inputs, Asset 1 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, Asset 2 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, Asset $ 295 $ 271
Minimum    
Fair Value Inputs Assets Quantitative Information 1 [Line Items]    
Revenue growth rate 4.00%  
Discount rate 1.40%  
Maximum    
Fair Value Inputs Assets Quantitative Information 1 [Line Items]    
Revenue growth rate 31.00%  
Discount rate 6.40%