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EMPLOYEE RETIREMENT PLANS (Tables)
12 Months Ended
Dec. 31, 2023
Retirement Benefits [Abstract]  
Schedule of Changes in Accumulated Postemployment Benefit Obligations
The following table shows the change in the accumulated postretirement benefit obligation ("APBO") for the years ended December 31, 2023 and 2022:
 
(in millions)20232022
APBO at beginning of period$241 $330 
Service cost14 19 
Interest cost12 
Benefits paid(9)(11)
Actuarial (gain) loss11 (106)
APBO at end of period$269 $241 
Schedule of Amounts Recognized in Balance Sheet
The following table reconciles the funded status of the plans to the accrued postretirement benefit cost recognized in Other noncurrent liabilities on the Company’s Consolidated Balance Sheet as of December 31, 2023 and 2022.
 
(in millions)20232022
Funded status$(269)$(241)
Unrecognized net actuarial gain(151)(173)
Unrecognized prior service cost
Accumulated other comprehensive income149 170 
Consolidated Balance Sheet liability$(269)$(241)
Schedule of Net Benefit Costs
The consolidated periodic postretirement benefit cost for the years ended December 31, 2023, 2022, and 2021, included the following:
 
(in millions)202320222021
Service cost$14 $19 $25 
Interest cost12 10 
Amortization of net gain(10)(2)— 
Net periodic postretirement benefit cost$16 $26 $35 
Schedule of Assumptions Used The following actuarial assumptions were used to account for the Company’s postretirement benefit plans at December 31, 2023, 2022, and 2021:
 
202320222021
Weighted-average discount rate5.20 %5.60 %2.90 %
Assumed healthcare cost trend rate (a)6.25 %6.50 %6.25 %
 
(a)The assumed healthcare cost trend rate is expected to be 6.25% for 2024, then decline gradually to 4.75% by 2030 and remain level thereafter.