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PENSION AND OTHER POSTRETIREMENT BENEFITS - Anticipated Pension and Postretirement Benefit Plan Payments (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 20
2019 13
2020 13
2021 14
2022 14
2023-2027 71
Postretirement Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2018 1
2019 1
2020 1
2021 1
2022 1
2023-2027 5
Domestic | Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2018 2
2019 2
2020 2
2021 2
2022 2
2023-2027 7
Foreign | Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2018 17
2019 10
2020 10
2021 11
2022 11
2023-2027 $ 59