Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Details 2)

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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ 7,409 $ 8,843 $ 8,371
Defined Benefit Plan, Plan Assets, Benefits Paid 71 56  
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 289 288 $ 255
Defined Benefit Plan, Plan Assets, Benefits Paid 67 68  
Cash and cash equivalents | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 463 691  
Cash and cash equivalents | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 73 78  
Equity securities U.S.-based companies | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 1,760 2,097  
Equity securities U.S.-based companies | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 93 96  
Equity securities International-based companies | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 1,121 1,465  
Equity securities International-based companies | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 7 8  
Government bonds | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 463 374  
Government bonds | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 2 2  
Corporate bonds and debt securities | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 835 827  
Corporate bonds and debt securities | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 16 7  
Mutual, pooled and commingled funds | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 875 981  
Mutual, pooled and commingled funds | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 82 80  
Hedge funds/limited partnerships | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 828 983  
Hedge funds/limited partnerships | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 8 8  
Real estate | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 391 598  
Real estate | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 4 5  
Other Investments | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 673 827  
Other Investments | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ 4 4  
United States      
Defined Benefit Plan Disclosure      
Portion of projected pension benefit obligation represented by the defined benefit plan (as a percent) 62.00%    
Fair Value of Plan Assets $ 4,842 6,028  
United States | Cash and cash equivalents      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 310 454  
United States | Equity securities U.S.-based companies      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 1,116 1,427  
United States | Equity securities International-based companies      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 659 911  
United States | Government bonds      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 192 183  
United States | Corporate bonds and debt securities      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 745 785  
United States | Mutual, pooled and commingled funds      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 238 215  
United States | Hedge funds/limited partnerships      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 785 939  
United States | Real estate      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 385 596  
United States | Other Investments      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 412 518  
Non-US [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 2,567 2,815  
Non-US [Member] | Cash and cash equivalents      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 153 237  
Non-US [Member] | Equity securities U.S.-based companies      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 644 670  
Non-US [Member] | Equity securities International-based companies      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 462 554  
Non-US [Member] | Government bonds      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 271 191  
Non-US [Member] | Corporate bonds and debt securities      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 90 42  
Non-US [Member] | Mutual, pooled and commingled funds      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 637 766  
Non-US [Member] | Hedge funds/limited partnerships      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 43 44  
Non-US [Member] | Real estate      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 6 2  
Non-US [Member] | Other Investments      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ 261 $ 309