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ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)
 12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Schedule of Components of Accumulated Other Comprehensive Income (loss)
Components of accumulated other comprehensive income include the following:
 As of December 31,
 202320222021
 (In millions)
Pension and postretirement benefit plan (Note 12)
$15 $14 $22 
Accumulated other comprehensive income$15 $14 $22