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) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value Assets Impairment Charges Measured on Nonrecurring Basis [Domain]
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Impairment Charges	$ 594	$ 492	$ 809
Fair value on a non-recurring basis | Other investments
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Impairment Charges	77	76	189
Fair value on a non-recurring basis | Investments in life settlements
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Impairment Charges	360	397	540
Fair value on a non-recurring basis | Other assets
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Impairment Charges	157	19	$ 80
Fair value on a non-recurring basis | Other assets | Divested Businesses
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Impairment Charges	35
Fair value on a non-recurring basis | Level 1 | Other investments
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	0
Fair value on a non-recurring basis | Level 1 | Investments in life settlements
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	0
Fair value on a non-recurring basis | Level 1 | Other assets
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	0
Fair value on a non-recurring basis | Level 2 | Other investments
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	0
Fair value on a non-recurring basis | Level 2 | Investments in life settlements
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	0
Fair value on a non-recurring basis | Level 2 | Other assets
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	0
Fair value on a non-recurring basis | Level 3 | Fair Value Assets Impairment Charges Measured on Nonrecurring Basis [Domain]
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	55	1,102
Fair value on a non-recurring basis | Level 3 | Other investments
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	55	364
Fair value on a non-recurring basis | Level 3 | Investments in life settlements
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	736
Fair value on a non-recurring basis | Level 3 | Other assets
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	2
Fair value on a non-recurring basis | Total Fair Value | Fair Value Assets Impairment Charges Measured on Nonrecurring Basis [Domain]
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	55	1,102
Fair value on a non-recurring basis | Total Fair Value | Other investments
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	55	364
Fair value on a non-recurring basis | Total Fair Value | Investments in life settlements
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	0	736
Fair value on a non-recurring basis | Total Fair Value | Other assets
FAIR VALUE, ASSETS MEASUREMENTS ON A NON-RECURRING BASIS
Assets at Fair Value, Non-Recurring Basis	$ 0	$ 2