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PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS - Summary of Net-of-Tax Amounts Recorded in OCI Relating to Pension and OPEB Plans (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Summary of the net-of-tax amounts recorded in OCI relating to pension and OPEB plans      
Gain (loss) arising during the year, net of tax of $6 in 2022, $43 in 2021 and $17 in 2020 $ (9,000,000) $ 160,000,000 $ 59,000,000
Amortization of loss to earnings, net of tax of $6 in 2022, $17 in 2021 and $12 in 2020 24,000,000 65,000,000 47,000,000
Settlement charges, net of tax of zero in 2022, zero in 2021 and $11 in 2020 1,000,000 2,000,000 35,000,000
Pension and other employee benefits 16,000,000 227,000,000 141,000,000
Gain (loss) arising during the year, tax expense (benefit) 6,000,000 43,000,000 17,000,000
Amortization of loss to earnings, tax benefit 6,000,000 17,000,000 12,000,000
Settlement, tax benefit $ 0 $ 0 $ 11,000,000