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RETIREMENT AND OTHER BENEFIT PROGRAMS - Expected Net Pension and OPEB Plan Payments for Next 10 Years (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Pension benefits  
Expected Net Pension and OPEB Plan Payments for the Next 10 Years  
2020 $ 86
2021 104
2022 118
2023 132
2024 149
2024 through 2028 917
Total expected net benefit payments for next 10 years 1,506
OPEB  
Expected Net Pension and OPEB Plan Payments for the Next 10 Years  
2020 20
2021 18
2022 17
2023 17
2024 16
2024 through 2028 71
Total expected net benefit payments for next 10 years $ 159