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OTHER LIABILITIES, INCLUDING EMPLOYEE BENEFITS (Schedule of Disclosures) (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Jul. 31, 2020
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Rp / $
Dec. 31, 2019
USD ($)
Rp / $
Dec. 31, 2018
USD ($)
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]          
Projected benefit obligation     $ 2,666 $ 2,522  
Accumulated benefit obligation     2,664 2,361  
Fair value of plan assets     1,884 1,615  
Amounts recognized in other comprehensive loss (income) [Abstract]          
Actuarial net loss (gain), net of tax     (46) 116 $ 77
Prior service (credit) cost, net of tax     0 0 4
Domestic Plan [Member]          
Change in benefit obligation:          
Benefit obligation at beginning of year     2,576 2,230  
Service cost     37 42 44
Interest cost     77 95 84
Actuarial losses (gains)     308 328  
Foreign exchange losses (gains)     1 1  
Defined Benefit Plan, Benefit Obligation, Benefits Paid     123 120  
Benefits obligation at end of year     2,722 2,576 2,230
Change in plan assets:          
Fair value of plan assets at beginning of year     1,677 1,433  
Actual return on plan assets     272 289  
Employer contributions     119 74  
Foreign exchange gains (losses)     1 1  
Benefits and administrative expenses paid     (123) (120)  
Fair value of plan assets at end of year     1,946 1,677 $ 1,433
Funded status at end of year     (776) (899)  
Accumulated benefit obligation     $ 2,719 $ 2,414  
Weighted-average assumptions used to determine benefit obligations [Abstract]          
Discount rate     2.50% 3.40% 4.40%
Rate of compensation increase     0.00% 3.25%  
Balance sheet classification of funded status:          
Other assets     $ 7 $ 8  
Accounts payable and accrued liabilities     (4) (4)  
Other liabilities     (779) (903)  
Total     (776) $ (899)  
Estimated future employer contributions in next fiscal year     $ 64    
Weighted-average assumptions used to determine benefit obligations [Abstract]          
Discount rate     2.98% 4.40% 3.70%
Expected return on plan assets     6.25% 6.50% 6.50%
Rate of compensation increase     3.25% 3.25% 3.25%
Components of net periodic benefit (income) cost and other amounts recognized in other comprehensive income [Abstract]          
Service cost     $ 37 $ 42 $ 44
Interest cost     77 95 84
Expected return on plan assets     (105) (90) (101)
Amortization of net actuarial losses     45 48 49
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment     4 0 0
Net periodic benefit cost     $ 58 95 76
SERP          
Defined Benefit Plan Disclosure [Line Items]          
Years of service required for annuity to equal percentage of executive's highest average compensation for any consecutive three-year period during the preceeding five years before retirement     25 years    
Foreign Plan [Member]          
Change in benefit obligation:          
Benefit obligation at beginning of year     $ 217 220  
Service cost     11 12 13
Interest cost     14 17 14
Actuarial losses (gains)     12 (27)  
Foreign exchange losses (gains)     (2) 8  
Defined Benefit Plan, Benefit Obligation, Benefits Paid     14 13  
Benefits obligation at end of year     238 217 220
Change in plan assets:          
Fair value of plan assets at beginning of year     254 238  
Actual return on plan assets     13 19  
Employer contributions     2 0  
Foreign exchange gains (losses)     (4) 10  
Benefits and administrative expenses paid     (14) (13)  
Fair value of plan assets at end of year     251 254 $ 238
Funded status at end of year     13 37  
Accumulated benefit obligation     $ 194 $ 175  
Weighted-average assumptions used to determine benefit obligations [Abstract]          
Discount rate     6.25% 7.25% 8.25%
Rate of compensation increase     4.00% 4.00%  
Balance sheet classification of funded status:          
Other assets     $ 13 $ 37  
Accounts payable and accrued liabilities     0 0  
Other liabilities     0 0  
Total     13 $ 37  
Estimated future employer contributions in next fiscal year     $ 2    
Foreign currency exchange rate | Rp / $     14,034 13,832  
Weighted-average assumptions used to determine benefit obligations [Abstract]          
Discount rate     7.25% 8.25% 6.75%
Expected return on plan assets     7.75% 8.25% 6.75%
Rate of compensation increase     4.00% 4.00% 4.00%
Components of net periodic benefit (income) cost and other amounts recognized in other comprehensive income [Abstract]          
Service cost     $ 11 $ 12 $ 13
Interest cost     14 17 14
Expected return on plan assets     (19) (17) (19)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)     2 1 2
Amortization of net actuarial losses     (3) (1) (1)
Net periodic benefit cost     5 12 $ 9
Pension Plan          
Amounts recognized in other comprehensive loss (income) [Abstract]          
Actuarial net loss (gain), Before Taxes     673 710  
Prior service (credit), Before Taxes     6 11  
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax     679 721  
Actuarial net loss (gain), net of tax     558 604  
Prior service (credit) cost, net of tax     1 6  
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax     $ 559 $ 610  
Postretirement Medical and Life Insurance Benefit Plans          
Weighted-average assumptions used to determine benefit obligations [Abstract]          
Discount rate     2.21% 3.00%  
Rate of compensation increase 325.00%        
Balance sheet classification of funded status:          
Accounts payable and accrued liabilities     $ (7) $ (13)  
Other liabilities     $ (69) $ (112)  
Weighted-average assumptions used to determine benefit obligations [Abstract]          
Discount rate 240.00%   3.00% 4.20% 3.50%
Expected return on plan assets 625.00%        
Components of net periodic benefit (income) cost and other amounts recognized in other comprehensive income [Abstract]          
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment   $ (4)      
Net periodic benefit cost     $ 3 $ 4 $ 5