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PENSION AND OTHER POSTRETIREMENT BENEFITS 2 (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other Postretirement Benefits [Member] |  |  |  |  |
Actuarial assumptions used to determine benefit obligations as of December 31: [Abstract] |  |  |  |  |
Discount rate |  |  | 2.20% | 3.03% | 4.07%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation | 3.03% |  | 2.36% | 4.07% | 3.39%
UNITED STATES |  |  |  |  |
Actuarial assumptions used to determine benefit obligations as of December 31: [Abstract] |  |  |  |  |
Discount rate |  |  | 2.50% | 3.22% | 4.35%
Expected annual rate of compensation increase |  |  | 3.25% | 3.25% | 3.25%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  |  | 3.22% | 4.35% | 3.68%
Expected rate of return on plan assets |  |  | 6.15% | 6.75% | 7.75%
Expected annual rate of compensation increase |  |  | 3.25% | 3.25% | 4.50%
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |  |  |
Projected benefit obligations |  |  | $ 353,000,000 | $ 357,000,000 |
Accumulated benefit obligations |  |  | 341,000,000 | 347,000,000 |
Fair value of plan assets |  |  | 0 | 0 |
Defined Benefit Plan Accumulated Benefit Obligation [Abstract] |  |  |  |  |
Accumulated benefit obligation |  |  | $ 17,900,000,000 | $ 17,200,000,000 |
UNITED STATES | Service Cost |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  |  | 3.33% | 4.47% | 3.77%
UNITED STATES | Interest Costs |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  |  | 2.76% | 3.94% | 3.27%
UNITED STATES | Forecast [Member] |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Expected rate of return on plan assets |  | 6.15% |  |  |
UNITED STATES | Forecast [Member] | Service Cost |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  | 2.67% |  |  |
UNITED STATES | Forecast [Member] | Interest Costs |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  | 1.76% |  |  |
Foreign Plan [Member] |  |  |  |  |
Actuarial assumptions used to determine benefit obligations as of December 31: [Abstract] |  |  |  |  |
Discount rate |  |  | 1.23% | 1.81% | 2.63%
Expected annual rate of compensation increase |  |  | 2.43% | 2.47% | 2.46%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  |  | 1.81% | 2.63% | 2.36%
Expected rate of return on plan assets |  |  | 4.66% | 5.14% | 6.23%
Expected annual rate of compensation increase |  |  | 2.47% | 2.46% | 2.49%
Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] |  |  |  |  |
Projected benefit obligations |  |  | $ 2,116,000,000 | $ 1,018,000,000 |
Accumulated benefit obligations |  |  | 2,042,000,000 | 973,000,000 |
Fair value of plan assets |  |  | 1,208,000,000 | 233,000,000 |
Defined Benefit Plan Accumulated Benefit Obligation [Abstract] |  |  |  |  |
Accumulated benefit obligation |  |  | $ 7,600,000,000 | $ 6,800,000,000 |
Foreign Plan [Member] | Service Cost |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  |  | 1.48% | 2.26% | 2.20%
Foreign Plan [Member] | Interest Costs |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |
Discount rate - benefit obligation |  |  | 1.56% | 2.34% | 2.08%

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