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
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ 8,639 $ 8,080 $ 7,429
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ 396 339 $ 289
Domestic Plan      
Defined Benefit Plan Disclosure      
Portion of projected pension benefit obligation represented by the defined benefit plan (as a percent) 61.00%    
Fair Value of Plan Assets $ 5,373 5,149  
Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 3,266 2,931  
Cash and cash equivalents | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 678 741  
Cash and cash equivalents | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 30 57  
Cash and cash equivalents | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 279 364  
Cash and cash equivalents | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 399 377  
Equity Securities, US based companies | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 2,139 1,904  
Equity Securities, US based companies | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 170 124  
Equity Securities, US based companies | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 1,382 1,231  
Equity Securities, US based companies | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 757 673  
Equity Securities, International based companies | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 1,726 1,387  
Equity Securities, International based companies | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 12 9  
Equity Securities, International based companies | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 988 770  
Equity Securities, International based companies | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 738 617  
Government bonds | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 637 536  
Government bonds | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 3 3  
Government bonds | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 220 263  
Government bonds | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 417 273  
Corporate bonds and debt securities | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 1,042 964  
Corporate bonds and debt securities | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 80 47  
Corporate bonds and debt securities | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 926 899  
Corporate bonds and debt securities | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 116 65  
Mutual, pooled and commingled funds | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 814 898  
Mutual, pooled and commingled funds | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 86 84  
Mutual, pooled and commingled funds | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 301 279  
Mutual, pooled and commingled funds | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 513 619  
Hedge funds/limited partnerships | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 622 689  
Hedge funds/limited partnerships | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 7 7  
Hedge funds/limited partnerships | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 588 652  
Hedge funds/limited partnerships | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 34 37  
Real estate | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 332 342  
Real estate | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 4 4  
Real estate | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 326 337  
Real estate | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 6 5  
Other | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 664 619  
Other | Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 4 4  
Other | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 364 354  
Other | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets 300 265  
Defined Benefit Plan, Derivative | Pension benefits      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets (15) 0  
Defined Benefit Plan, Derivative | Domestic Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets (1) 0  
Defined Benefit Plan, Derivative | Foreign Plan      
Defined Benefit Plan Disclosure      
Fair Value of Plan Assets $ (14) $ 0