Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS (Details 3)

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FAIR VALUE MEASUREMENTS (Details 3) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Pension Plans, Defined Benefit [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets $ 8,843 $ 8,371 $ 7,689
Pension Plans, Defined Benefit [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 691 402  
Pension Plans, Defined Benefit [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 2,097 1,827  
Pension Plans, Defined Benefit [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 1,465 939  
Pension Plans, Defined Benefit [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 374 526  
Pension Plans, Defined Benefit [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 827 996  
Pension Plans, Defined Benefit [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 981 1,133  
Pension Plans, Defined Benefit [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 983 1,213  
Pension Plans, Defined Benefit [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 598 523  
Pension Plans, Defined Benefit [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 827 812  
Other Postretirement Benefits Plan [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 288 255 $ 245
Other Postretirement Benefits Plan [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 78 2  
Other Postretirement Benefits Plan [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 96 116  
Other Postretirement Benefits Plan [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 8 8  
Other Postretirement Benefits Plan [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 2 3  
Other Postretirement Benefits Plan [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 7 6  
Other Postretirement Benefits Plan [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 80 103  
Other Postretirement Benefits Plan [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 8 9  
Other Postretirement Benefits Plan [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 5 4  
Other Postretirement Benefits Plan [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 4 4  
Level 1 | Pension Plans, Defined Benefit [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 4,410 3,211  
Level 1 | Pension Plans, Defined Benefit [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 626 373  
Level 1 | Pension Plans, Defined Benefit [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 2,080 1,812  
Level 1 | Pension Plans, Defined Benefit [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 1,465 935  
Level 1 | Pension Plans, Defined Benefit [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Pension Plans, Defined Benefit [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Pension Plans, Defined Benefit [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 239 91  
Level 1 | Pension Plans, Defined Benefit [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Pension Plans, Defined Benefit [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Pension Plans, Defined Benefit [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Other Postretirement Benefits Plan [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 182 224  
Level 1 | Other Postretirement Benefits Plan [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 78 2  
Level 1 | Other Postretirement Benefits Plan [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 96 116  
Level 1 | Other Postretirement Benefits Plan [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 8 8  
Level 1 | Other Postretirement Benefits Plan [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Other Postretirement Benefits Plan [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Other Postretirement Benefits Plan [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 98  
Level 1 | Other Postretirement Benefits Plan [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Other Postretirement Benefits Plan [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 1 | Other Postretirement Benefits Plan [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Pension Plans, Defined Benefit [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 1,287 1,560  
Level 2 | Pension Plans, Defined Benefit [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 65 29  
Level 2 | Pension Plans, Defined Benefit [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 3 1  
Level 2 | Pension Plans, Defined Benefit [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 4  
Level 2 | Pension Plans, Defined Benefit [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 374 525  
Level 2 | Pension Plans, Defined Benefit [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 803 978  
Level 2 | Pension Plans, Defined Benefit [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 42 20  
Level 2 | Pension Plans, Defined Benefit [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Pension Plans, Defined Benefit [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Pension Plans, Defined Benefit [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 3  
Level 2 | Other Postretirement Benefits Plan [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 9 9  
Level 2 | Other Postretirement Benefits Plan [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Other Postretirement Benefits Plan [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Other Postretirement Benefits Plan [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Other Postretirement Benefits Plan [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 2 3  
Level 2 | Other Postretirement Benefits Plan [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 7 6  
Level 2 | Other Postretirement Benefits Plan [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Other Postretirement Benefits Plan [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Other Postretirement Benefits Plan [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 2 | Other Postretirement Benefits Plan [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 3 | Pension Plans, Defined Benefit [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 303 246  
Reconciliation of the beginning and ending balance of Level 3 assets for U.S. and non-U.S. pension plans      
Balance at the beginning of the period 246 235  
Actual return on plan assets:      
Related to assets still held at the reporting date 2 13  
Related to assets sold during the year   1  
Purchases, sales and settlements-net (5) (11)  
Transfers into/(or out) of Level 3-net 34 10  
Foreign currency translation adjustments 26 (2)  
Balance at the end of the period 303 246  
Level 3 | Pension Plans, Defined Benefit [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 3 | Pension Plans, Defined Benefit [Member] | Equity securities      
Reconciliation of the beginning and ending balance of Level 3 assets for U.S. and non-U.S. pension plans      
Balance at the beginning of the period 14 11  
Actual return on plan assets:      
Related to assets still held at the reporting date (3) 4  
Related to assets sold during the year   0  
Purchases, sales and settlements-net 3 0  
Transfers into/(or out) of Level 3-net 0 (1)  
Foreign currency translation adjustments 0 0  
Balance at the end of the period 14 14  
Level 3 | Pension Plans, Defined Benefit [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 14 14  
Level 3 | Pension Plans, Defined Benefit [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 3 | Pension Plans, Defined Benefit [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 1  
Level 3 | Pension Plans, Defined Benefit [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 24 18  
Level 3 | Pension Plans, Defined Benefit [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 3 | Pension Plans, Defined Benefit [Member] | Fixed Income Securities [Member]      
Reconciliation of the beginning and ending balance of Level 3 assets for U.S. and non-U.S. pension plans      
Balance at the beginning of the period 19 3  
Actual return on plan assets:      
Related to assets still held at the reporting date 1 2  
Related to assets sold during the year   (2)  
Purchases, sales and settlements-net 1 12  
Transfers into/(or out) of Level 3-net 3 4  
Foreign currency translation adjustments 0 0  
Balance at the end of the period 24 19  
Level 3 | Pension Plans, Defined Benefit [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Level 3 | Pension Plans, Defined Benefit [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 2 2  
Reconciliation of the beginning and ending balance of Level 3 assets for U.S. and non-U.S. pension plans      
Balance at the beginning of the period 2 2  
Actual return on plan assets:      
Related to assets still held at the reporting date 0 0  
Related to assets sold during the year   0  
Purchases, sales and settlements-net 0 0  
Transfers into/(or out) of Level 3-net 0 0  
Foreign currency translation adjustments 0 0  
Balance at the end of the period 2 2  
Level 3 | Pension Plans, Defined Benefit [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 263 211  
Reconciliation of the beginning and ending balance of Level 3 assets for U.S. and non-U.S. pension plans      
Balance at the beginning of the period 211 219  
Actual return on plan assets:      
Related to assets still held at the reporting date 4 7  
Related to assets sold during the year   3  
Purchases, sales and settlements-net (9) (23)  
Transfers into/(or out) of Level 3-net 31 7  
Foreign currency translation adjustments 26 (2)  
Balance at the end of the period 263 211  
Other | Pension Plans, Defined Benefit [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 2,843 3,354  
Other | Pension Plans, Defined Benefit [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Pension Plans, Defined Benefit [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Pension Plans, Defined Benefit [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Pension Plans, Defined Benefit [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Pension Plans, Defined Benefit [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Pension Plans, Defined Benefit [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 700 1,022  
Other | Pension Plans, Defined Benefit [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 983 1,213  
Other | Pension Plans, Defined Benefit [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 596 521  
Other | Pension Plans, Defined Benefit [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 564 598  
Other | Other Postretirement Benefits Plan [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 97 22  
Other | Other Postretirement Benefits Plan [Member] | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Other Postretirement Benefits Plan [Member] | Equity securities US based companies [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Other Postretirement Benefits Plan [Member] | Equity securities International-based companies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Other Postretirement Benefits Plan [Member] | Government bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Other Postretirement Benefits Plan [Member] | Corporate bonds and debt securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 0 0  
Other | Other Postretirement Benefits Plan [Member] | Mutual, pooled and commingled funds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 80 5  
Other | Other Postretirement Benefits Plan [Member] | Hedge funds/limited partnerships      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 8 9  
Other | Other Postretirement Benefits Plan [Member] | Real estate      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets 5 4  
Other | Other Postretirement Benefits Plan [Member] | Other      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair Value of Plan Assets $ 4 $ 4