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EMPLOYEE BENEFIT PLANS (Tables)
 12 Months Ended
Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets
Defined benefit plans with projected benefit obligations and accumulated benefit obligations exceeding fair value of plan assets are as follows (in millions):
 20232022
Projected benefit obligation$1,403 $1,332 
Accumulated benefit obligation1,327 1,267 
Fair value of plan assets1,158 1,092 
Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets
Qualified Defined Benefit [Member]  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Assumptions Used [Table Text Block]
Weighted average assumptions used to determine benefit obligations:

The rates below vary by plan and related work group.
 20232022
Discount rates
5.14% to 5.16%
5.41% to 5.42%
Rate of compensation increases
2.01% to 2.34%
2.01% to 2.35%

Weighted average assumptions used to determine net periodic benefit cost:

The rates below vary by plan and related work group.
 202320222021
Discount rates
5.41% to 5.42%
2.82% to 2.90%
2.43% to 2.58%
Expected return on plan assets
5.00% to 6.50%
3.00% to 5.25%
3.00% to 5.50%
Rate of compensation increases
2.01% to 2.35%
2.02% to 2.38%
2.02% to 2.43%
Schedule of Allocation of Plan Assets [Table Text Block] The target and actual asset allocation of the funds in the qualified defined-benefit plans, by asset category, are as follows: 
Salaried Plan(a)
All Other Plans
 Target20232022Target20232022
Asset category:  
Domestic equity securities
2%-12%
7 %7 %
29%-39%
36 %35 %
Non-U.S. equity securities
0%-8%
3 %3 %
9%-19%
15 %15 %
Fixed income securities
85%-95%
90 %90 %
37%-57%
45 %45 %
Real estate
0%
— %— %
0%-10%
4 %5 %
Plan assets100 %100 %100 %100 %
(a) As our Salaried Plan is frozen and fully funded, our investment strategies differ significantly from that of our other outstanding plans. Investments are in lower-risk securities, with earnings designed to maintain a fully-funded status.
Plan assets by fund category (in millions):
 20232022Fair Value Hierarchy
Fund type:  
U.S. equity market fund$634 $568 2
Non-U.S. equity fund261 242 2
Credit bond index fund1,061 1,001 2
Plan assets in common commingled trusts$1,956 $1,811 
Real estate60 76 (a)
Cash equivalents7 7 1
Total plan assets$2,023 $1,894 
(a) In accordance with Subtopic 820-10, certain investments that are measured at net asset value per share (or its equivalent) have not been classified in the fair value hierarchy.
Schedule of Net Funded Status [Table Text Block]
The following table sets forth the status of the qualified defined-benefit pension plans (in millions):
 20232022
Projected benefit obligation (PBO)  
Beginning of year$2,079 $2,758 
Service cost29 46 
Interest cost108 66 
Plan amendments(a)
— 9 
Actuarial (gain)/loss83 (628)
Benefits paid(116)(172)
End of year$2,183 $2,079 
Plan assets at fair value  
Beginning of year$1,894 $2,695 
Actual return on plan assets245 (629)
Benefits paid(116)(172)
End of year$2,023 $1,894 
Unfunded status$(160)$(185)
Percent funded93 %91 %
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]
The amounts recognized in the consolidated balance sheets (in millions): 
 20232022
Accrued benefit liability-long term$(245)$(240)
Plan assets-long term (within Other noncurrent assets)85 55 
Total liability recognized$(160)$(185)
 
The amounts not yet reflected in net periodic benefit cost and included in AOCL (in millions):
 20232022
Prior service cost (credit)$6 $6 
Net loss367 438 
Amount recognized in AOCL (pretax)$373 $444 
Schedule of Net Benefit Costs [Table Text Block]
Net pension expense for the qualified defined-benefit plans included the following components (in millions): 
 202320222021
Service cost$29 $45 $52 
Interest cost108 65 56 
Expected return on assets(114)(128)(122)
Amortization of prior service credit— (1)(1)
Recognized actuarial loss23 8 37 
Net pension expense (benefit)$46 $(11)$22 
Schedule of Expected Benefit Payments [Table Text Block]
Future benefits expected to be paid over the next ten years under the qualified defined-benefit pension plans from the assets of those plans (in millions): 
Total
2024$113 
2025131 
2026139 
2027154 
2028163 
2029-2033854