EMPLOYEE BENEFITS (Details - Assets Measured at Fair Value) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Investments measured at Fair Value	$ 5,997	$ 6,741
Pensions | Other Investment Types
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	777	960
Pensions | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,350	3,843	$ 4,359
Pensions | U.S. Plans | Other investment types: Annuity contracts | US Life
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	21
Pensions | U.S. Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,962	1,443
Pensions | U.S. Plans | Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	397	228
Pensions | U.S. Plans | Level 1 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,300	838
Pensions | U.S. Plans | Level 1 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	265	377
Pensions | U.S. Plans | Level 1 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 1 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | 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
Pensions | U.S. Plans | Level 1 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 1 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 1 | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 1 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 1 | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 1 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 1 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,584	1,414
Pensions | U.S. Plans | Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	1
Pensions | U.S. Plans | Level 2 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,006	1,174
Pensions | U.S. Plans | Level 2 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	204	0
Pensions | 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	212	218
Pensions | U.S. Plans | Level 2 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	142	0
Pensions | U.S. Plans | Level 2 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2 | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2 | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 2 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	21
Pensions | U.S. Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	26	37
Pensions | U.S. Plans | Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12	2
Pensions | U.S. Plans | Level 3 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | 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
Pensions | U.S. Plans | Level 3 | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Level 3 | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15	24	28
Pensions | U.S. Plans | Level 3 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,573	2,883
Pensions | U.S. Plans | Total Fair Value | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	397	228
Pensions | U.S. Plans | Total Fair Value | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,300	839
Pensions | U.S. Plans | Total Fair Value | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	265	377
Pensions | U.S. Plans | Total Fair Value | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,018	1,176
Pensions | U.S. Plans | Total Fair Value | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	204	0
Pensions | U.S. Plans | Total Fair Value | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	212	218
Pensions | U.S. Plans | Total Fair Value | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	142	0
Pensions | U.S. Plans | Total Fair Value | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Total Fair Value | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Total Fair Value | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Total Fair Value | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | U.S. Plans | Total Fair Value | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15	24
Pensions | U.S. Plans | Total Fair Value | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	21
Pensions | Non U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	875	803	773
Pensions | Non U.S. Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	413	348
Pensions | Non U.S. Plans | Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51	50
Pensions | Non U.S. Plans | Level 1 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 1 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	362	298
Pensions | Non U.S. Plans | Level 1 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | 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
Pensions | 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
Pensions | 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
Pensions | Non U.S. Plans | Level 1 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 1 | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 1 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 1 | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | 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
Pensions | Non U.S. Plans | Level 1 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	348	347
Pensions | Non U.S. Plans | Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 2 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 2 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	64	58
Pensions | Non U.S. Plans | Level 2 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 2 | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	90
Pensions | 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	171	186
Pensions | 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
Pensions | Non U.S. Plans | Level 2 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16	13
Pensions | Non U.S. Plans | Level 2 | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 2 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 2 | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | 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
Pensions | Non U.S. Plans | Level 2 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	113	108	95
Pensions | Non U.S. Plans | Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 3 | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 3 | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 3 | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | 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
Pensions | 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
Pensions | 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
Pensions | Non U.S. Plans | Level 3 | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 3 | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 3 | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Level 3 | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | 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
Pensions | Non U.S. Plans | Level 3 | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	113	108	$ 95
Pensions | Non U.S. Plans | Total Fair Value
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	874	803
Pensions | Non U.S. Plans | Total Fair Value | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51	50
Pensions | Non U.S. Plans | Total Fair Value | Equity securities - U.S.
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Total Fair Value | Equity securities - International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	426	356
Pensions | Non U.S. Plans | Total Fair Value | U.S. investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Total Fair Value | Fixed maturity securities - International investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97	90
Pensions | Non U.S. Plans | Total Fair Value | Fixed maturity securities - U.S. and international high yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	171	186
Pensions | Non U.S. Plans | Total Fair Value | Mortgage-backed, asset-backed and collateralized
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Total Fair Value | Other fixed maturity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	16	13
Pensions | Non U.S. Plans | Total Fair Value | Other investment types - Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Total Fair Value | Other investment types - Futures
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Total Fair Value | Other investment types - Real Estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Total Fair Value | Other investment types - Direct private equity
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Pensions | Non U.S. Plans | Total Fair Value | Other investment types - Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 113	$ 108