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FAIR VALUE MEASUREMENTS (Details - Investments in certain other invested assets, including private equity funds, hedge funds and other alternative investments) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent $ 4,989 $ 5,549
Unfunded Commitments 2,654 2,666
Direct private equity    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 3,380 3,220
Unfunded Commitments $ 2,653 2,665
Average original expected lives 10 years  
Direct private equity | Maximum [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Average original expected lives, Increments 2 years  
Direct private equity | Minimum [Member]    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Average original expected lives, Increments 1 year  
Leveraged buyout    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent $ 1,209 1,189
Unfunded Commitments 1,489 1,543
Real Estate / Infrastructure    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 395 400
Unfunded Commitments 445 290
Venture capital    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 129 111
Unfunded Commitments 161 155
Growth equity    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 450 422
Unfunded Commitments 82 57
Mezzanine    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 412 325
Unfunded Commitments 302 414
Other    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 785 773
Unfunded Commitments 174 206
Hedge funds    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 1,609 2,329
Unfunded Commitments 1 1
Event-driven    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 304 727
Unfunded Commitments 0 0
Long-short    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 414 539
Unfunded Commitments 0 0
Macro    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 737 894
Unfunded Commitments 0 0
Other    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 154 169
Unfunded Commitments $ 1 $ 1