FAIR VALUE MEASUREMENTS (Details - Quantitative Information about Level 3 Fair Value Measurements, Assets) $ in Millions	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Obligations of states, municipalities and political subdivisions | Minimum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0370	0.0274
Obligations of states, municipalities and political subdivisions | Maximum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0449	0.0333
Obligations of states, municipalities and political subdivisions | Weighted-average | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0410	0.0306
Obligations of states, municipalities and political subdivisions | Discounted cash flow | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 1,057	$ 1,400
Corporate debt | Minimum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0198	0.0223
Corporate debt | Maximum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0654	0.0769
Corporate debt | Weighted-average | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0426	0.0496
Corporate debt | Discounted cash flow | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 2,563	$ 1,561
Residential mortgage-backed securities | Minimum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0354	0.0169
Residential mortgage-backed securities | Minimum | Measurement Input Constant Prepayment Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0490	0.0525
Residential mortgage-backed securities | Minimum | Measurement Input Loss Severity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.3804	0.2613
Residential mortgage-backed securities | Minimum | Measurement Input Constant Default Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0123	0.0115
Residential mortgage-backed securities | Maximum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0534	0.0397
Residential mortgage-backed securities | Maximum | Measurement Input Constant Prepayment Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.1037	0.1770
Residential mortgage-backed securities | Maximum | Measurement Input Loss Severity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.6775	0.7193
Residential mortgage-backed securities | Maximum | Measurement Input Constant Default Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0347	0.0585
Residential mortgage-backed securities | Weighted-average | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0444	0.0283
Residential mortgage-backed securities | Weighted-average | Measurement Input Constant Prepayment Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0763	0.1147
Residential mortgage-backed securities | Weighted-average | Measurement Input Loss Severity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.5290	0.4903
Residential mortgage-backed securities | Weighted-average | Measurement Input Constant Default Rate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0235	0.0350
Residential mortgage-backed securities | Discounted cash flow | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 7,006	$ 9,916
Certain CDO/ABS | Minimum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0344	0.0184
Certain CDO/ABS | Maximum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0615	0.0477
Certain CDO/ABS | Weighted-average | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0479	0.0331
Certain CDO/ABS | Discounted cash flow | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 8,496	$ 8,229
Commercial mortgage backed securities | Minimum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0317	0.0150
Commercial mortgage backed securities | Maximum | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0562	0.0501
Commercial mortgage backed securities | Weighted-average | Measurement Input Yield [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Debt instrument, measurement input	0.0440	0.0325
Commercial mortgage backed securities | Discounted cash flow | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 626	$ 580