EMPLOYEE BENEFITS (Details - Assets Measured at Fair Value) - Pensions - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Investment Types
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,138	$ 777
U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,840	4,350	$ 3,843
U.S. | Levels 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,702	3,573
U.S. | Levels 1, 2 and 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	501	397
U.S. | Levels 1, 2 and 3 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	240	1,300
U.S. | Levels 1, 2 and 3 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	137	265
U.S. | Levels 1, 2 and 3 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,476	1,018
U.S. | Levels 1, 2 and 3 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	157	204
U.S. | Levels 1, 2 and 3 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	96	212
U.S. | Levels 1, 2 and 3 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	36	142
U.S. | Levels 1, 2 and 3 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Levels 1, 2 and 3 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27
U.S. | Levels 1, 2 and 3 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14	15
U.S. | Levels 1, 2 and 3 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18	20
U.S. | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	905	1,962
U.S. | Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	501	397
U.S. | Level 1 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	240	1,300
U.S. | Level 1 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	137	265
U.S. | Level 1 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 1 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 1 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 1 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 1 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 1 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27
U.S. | Level 1 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 1 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,770	1,584
U.S. | Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 2 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 2 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 2 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,463	1,006
U.S. | Level 2 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	157	204
U.S. | Level 2 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	96	212
U.S. | Level 2 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	36	142
U.S. | Level 2 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 2 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
U.S. | Level 2 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 2 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18	20
U.S. | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	27	26
U.S. | Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 3 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 3 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 3 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13	12
U.S. | Level 3 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 3 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 3 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 3 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. | Level 3 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
U.S. | Level 3 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14	15	24
U.S. | Level 3 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	861	875	803
Non U.S. Plans | Levels 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	861	874
Non U.S. Plans | Levels 1, 2 and 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	51
Non U.S. Plans | Levels 1, 2 and 3 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Levels 1, 2 and 3 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	302	426
Non U.S. Plans | Levels 1, 2 and 3 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Levels 1, 2 and 3 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	130	97
Non U.S. Plans | Levels 1, 2 and 3 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	185	171
Non U.S. Plans | Levels 1, 2 and 3 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Levels 1, 2 and 3 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	16
Non U.S. Plans | Levels 1, 2 and 3 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Levels 1, 2 and 3 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	145	113
Non U.S. Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	315	413
Non U.S. Plans | Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	51
Non U.S. Plans | Level 1 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 1 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	218	362
Non U.S. Plans | Level 1 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 1 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 1 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 1 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 1 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 1 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Non U.S. Plans | Level 1 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 1 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	401	348
Non U.S. Plans | Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 2 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 2 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	84	64
Non U.S. Plans | Level 2 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 2 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	130	97
Non U.S. Plans | Level 2 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	185	171
Non U.S. Plans | Level 2 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 2 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	16
Non U.S. Plans | Level 2 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Non U.S. Plans | Level 2 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 2 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	145	113	108
Non U.S. Plans | Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0
Non U.S. Plans | Level 3 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non U.S. Plans | Level 3 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 145	$ 113	$ 108