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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, 2021
Dec. 31, 2020
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent $ 7,378 $ 6,493
Unfunded Commitments 3,589 3,152
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 5,580 4,613
Unfunded Commitments $ 3,589 3,151
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 $ 2,217 1,752
Unfunded Commitments 1,796 1,960
Real assets    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Fair Value Using Net Asset Value Per Share or its equivalent 946 908
Unfunded Commitments 542 445
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 235 167
Unfunded Commitments 214 171
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 844 703
Unfunded Commitments 140 55
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 460 400
Unfunded Commitments 421 155
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 878 683
Unfunded Commitments 476 365
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 1,798 1,880
Unfunded Commitments 0 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 436 411
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 344 361
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 673 807
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 345 301
Unfunded Commitments $ 0 $ 1