HELD-FOR-SALE CLASSIFICATION (Details - Narrative) - USD ($) $ in Millions			3 Months Ended		12 Months Ended
	Nov. 25, 2019	Nov. 13, 2018	Mar. 31, 2020	Mar. 31, 2018	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets			$ 510,477		$ 525,064
Incremental loss on sale of business			2,600
Fortitude Holdings | Fortitude RE
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Parent owneship interest		100.00%
American International Group, Inc. | Fortitude
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of common stock held after closing of transaction	3.50%
Carlyle FRL | Fortitude
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Voting interest in subsidiary, percent	51.60%
T&D | Fortitude
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Voting interest in subsidiary, percent	25.00%
Assets held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss accrual			98		98
Fortitude
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration in cash		$ 381
Contingent considiration receivable			95
Contingent consideration receivable, maximum			$ 100
Planned distribution term			36 months
Expected payment to affiliates			$ 1,450
Loss accrual					98
Maximum purchase price adjustment payable			500
Fortitude | TC Group Cayman
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Voting interest in subsidiary, percent		19.90%
Fortitude | American International Group, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of common stock held after closing of transaction		80.10%
Fortitude | Assets held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets			2,700
Fortitude | Assets held-for-sale | Fortitude RE
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prepaid insurance			2,200	$ 2,500	2,300
Dispositions			$ (400)	$ (500)	$ (400)