FAIR VALUE MEASUREMENTS (Details - Assets measured at fair value on a non-recurring basis at the time of impairment and the related impairment charges recorded during the periods presented) - Fair value on a non-recurring basis - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Fair Value Assets Impairment Charges Measured on Nonrecurring Basis [Domain]
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	$ 208		$ 326
Impairment Charges	49	$ 28
Other investments
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Impairment Charges	41	28
Investments in life settlements
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Impairment Charges	0	0
Other assets
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Impairment Charges	8	$ 0
Level 3 | Fair Value Assets Impairment Charges Measured on Nonrecurring Basis [Domain]
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	208		326
Level 3 | Other investments
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	207		315
Level 3 | Investments in life settlements
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	0		0
Level 3 | Other assets
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	1		11
Total Fair Value | Other investments
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	207		315
Total Fair Value | Investments in life settlements
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	0		0
Total Fair Value | Other assets
Fair Value Assets Measured on Nonrecurring Basis [Line Items]
Fair Value	$ 1		$ 11