Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Details 5)

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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Details 5) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure    
Contributions expected to be made in next fiscal year $ 28  
Estimated future benefit payments for funded and unfunded plans    
2019 522  
2020 526  
2021 532  
2022 539  
2023 550  
2024-2028 2,783  
Estimated federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003, for the period 2019-2023 3  
Estimated federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003, for the period 2024-2028 $ 2  
Assumed health care cost trend rates    
Health care cost trend rate assumed for the next year (as a percent) 6.75% 7.00%
Rate at which the cost trend rate is assumed to decline, the ultimate trend rate (as a percent) 5.25% 5.00%
Year in which the rate reaches the ultimate trend rate 2025 2023
Pension benefits    
Estimated future benefit payments for funded and unfunded plans    
2019 $ 462  
2020 468  
2021 476  
2022 485  
2023 498  
2024-2028 2,543  
Other benefits    
Estimated future benefit payments for funded and unfunded plans    
2019 60  
2020 58  
2021 56  
2022 54  
2023 52  
2024-2028 $ 240