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EMPLOYEE BENEFIT PLANS
 12 Months Ended
Dec. 31, 2024
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS
Defined Benefit Pension Plans.
The Company maintains both qualified and non-qualified defined benefit pension plans for its U.S. employees employed prior to April 1, 2010.  Generally, the Company computes the benefits based on average earnings over a period prescribed by the plans and credited length of service.  The Company’s non-qualified defined benefit pension plan provided compensating pension benefits for participants whose benefits have been curtailed under the qualified plan due to the U.S. Internal Revenue Code (the “IRC”) limitations.  Effective January 1, 2018, participants of the Company’s non-qualified defined benefit pension plan no longer accrue additional service benefits. Additionally, on November 15, 2023, the Company's Board approved the termination of the qualified defined benefit pension plan. In June 2024, the Company amended the qualified defined benefit pension plan to freeze all benefits accruals and terminate the plan effective June 30, 2024. Plan participants no longer accrue future plan benefits after June 30, 2024.
Plan assets consist primarily of shares in investment trusts with 100% of the underlying assets consisting of short-term investments.  The Company manages the qualified plan investments for U.S. employees.

Although not required to make contributions under U.S. Internal Revenue Service (the “IRS”) regulations, the following table summarizes the Company’s contributions to the defined benefit pension plans for the periods indicated:
Years Ended December 31,
(Dollars in millions)202420232022
Company contributions$3 $1 $6 
The following table summarizes the Company’s pension expense for the periods indicated:
Years Ended December 31,
(Dollars in millions)202420232022
Pension expense$(15)$5 $(2)
The following table summarizes the status of these defined benefit plans for U.S. employees for the periods indicated:
Years Ended December 31,
(Dollars in millions)20242023
Change in projected benefit obligation:
Benefit obligation at beginning of year$295 $291 
Service cost3 5 
Interest cost14 14 
Actuarial (gain)/loss(17)9 
Curtailment(21)— 
Benefits paid(15)(25)
Projected benefit obligation at end of year259 295 
Change in plan assets:
Fair value of plan assets at beginning of year308 285 
Actual return on plan assets35 48 
Actual contributions during the year3 1 
Benefits paid(15)(25)
Fair value of plan assets at end of year331 308 
Funded status at end of year$73 $13 
(Some amounts may not reconcile due to rounding.)
Amounts recognized in the consolidated balance sheets for the periods indicated:
At December 31,
(Dollars in millions)20242023
Other assets (due beyond one year)$76 $19 
Other liabilities (due within one year)(1)(3)
Other liabilities (due beyond one year)(3)(3)
Net amount recognized in the consolidated balance sheets$73 $13 
(Some amounts may not reconcile due to rounding.)
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss) for the periods indicated:
At December 31,
(Dollars in millions)20242023
Accumulated income (loss)$9 $(33)
Accumulated other comprehensive income (loss)$9 $(33)
(Some amounts may not reconcile due to rounding.)
Other changes in other comprehensive income (loss) for the periods indicated are as follows:
Years Ended December 31,
(Dollars in millions)20242023
Other comprehensive income (loss) at December 31, prior year$(33)$(56)
Net gain (loss) arising during period51 19 
Recognition of amortizations in net periodic benefit cost:
Actuarial loss(9)4 
Curtailment loss recognized— — 
Other comprehensive income (loss) at December 31, current year$9 $(33)
(Some amounts may not reconcile due to rounding.)
Net periodic benefit cost for U.S. employees included the following components for the periods indicated:
Years Ended December 31,
(Dollars in millions)202420232022
Service cost$3 $5 $9 
Interest cost14 14 10 
Expected return on assets(22)(19)(25)
Amortization of actuarial loss from earlier periods— 4 4 
Settlement(9)— 1 
Net periodic benefit cost$(15)$5 $(2)
Other changes recognized in other comprehensive income (loss):
Other comprehensive income (loss) attributable to change from prior year(42)(23)
Total recognized in net periodic benefit cost and other
comprehensive income (loss)$(57)$(18)
(Some amounts may not reconcile due to rounding.)
The weighted average discount rates used to determine net periodic benefit cost for 2024, 2023 and 2022 were 5.00%, 5.25% and 2.86%, respectively.  The rate of compensation increase used to determine the net periodic benefit cost for January 2024 through April 2024 was 4.00%. The net periodic benefit cost was remeasured at May 1, 2024 due to plan curtailment. Rate of compensation increase is not applicable to calculate the net periodic benefit cost for May 2024 through December 2024. The rate of compensation increase used to determine the net periodic benefit cost for 2023 and 2022 was 4.00%.  The expected long-term rate of return on plan assets for 2024, 2023 and 2022 was 7.25%, 7.00% and 6.75% respectively.
The weighted average discount rates used to determine the actuarial present value of the projected benefit obligation for 2023 and 2022 were 5.00% and 5.25%, respectively. In 2024, the weighted average discount rate used to determine the actuarial present value of the projected benefit obligation, based on plan termination rates, was 4.75% for annuities and ranged from 4.66% to 5.57% for lump sums.
The following table summarizes the accumulated benefit obligation for the periods indicated:
At December 31,
(Dollars in millions)20242023
Qualified Plan$255 $263 
Non-qualified Plan3 6 
Total$259 $269 
(Some amounts may not reconcile due to rounding.)
The following table displays the plans with projected benefit obligations in excess of plan assets for the periods indicated:
At December 31,
(Dollars in millions)20242023
Non-qualified Plan
Projected benefit obligation$3 $6 
Fair value of plan assets— — 
The following table displays the plans with accumulated benefit obligations in excess of plan assets for the periods indicated:
At December 31,
(Dollars in millions)20242023
Non-qualified Plan
Accumulated benefit obligation$3 $6 
Fair value of plan assets— — 
The following table displays the expected benefit payments in the periods indicated:
(Dollars in millions)
2025$256 
20261 
20271 
2028— 
2029— 
Next 5 years1 
The following tables present the fair value measurement levels for the qualified plan assets at fair value for the periods indicated:
Fair Value Measurement Using:
(Dollars in millions)December 31, 2024Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Assets:
Short-term investments, which approximates fair value (a)$331 $331 $— $— 
Total$331 $331 $— $— 
(Some amounts may not reconcile due to rounding.)
(a)This category includes high quality, short-term money market instruments, which are issued and payable in U.S. dollars.
Fair Value Measurement Using:
(Dollars in millions)December 31, 2023Quoted Prices
in Active
Markets for
Identical
Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)
Assets:
Short-term investments, which approximates fair value (a)$2 $2 $— $— 
Mutual funds, fair value
Fixed income (b)73 73 — — 
Equities (c)232 232 — — 
Total$308 $308 $— $— 
(Some amounts may not reconcile due to rounding.)
(a)This category includes high quality, short-term money market instruments, which are issued and payable in U.S. dollars.
(b)This category includes fixed income funds, which invest in investment grade securities of corporations, governments and government agencies with approximately 90% in U.S. securities and 10% in international securities.
(c)This category includes funds, which invest in small, mid and multi-cap equity securities including common stocks, securities convertible into common stock and securities with common stock characteristics, such as rights and warrants, with approximately 100% in U.S. equities.
No contributions were made to the qualified pension benefit plan for the years ended December 31, 2024 and 2023.
Defined Contribution Plans.
The Company also maintains both qualified and non-qualified defined contribution plans (“Savings Plan” and “Non-Qualified Savings Plan”, respectively) covering U.S. employees.  Under the plans, the Company contributes up to a maximum 3% of the participants’ compensation based on the contribution percentage of the employee.  The Non-Qualified Savings Plan provides compensating savings plan benefits for participants whose benefits have been curtailed under the Savings Plan due to IRC limitations.  In addition, effective for new hires (and rehires) on or after April 1, 2010, the Company will contribute between 3% and 8% of an employee’s earnings for each payroll period based on the employee’s age.  These contributions will be 100% vested after three years. The Company incurred expenses related to these plans of $26 million, $22 million and $18 million for the years ended December 31, 2024, 2023 and 2022, respectively.
In addition, the Company maintains several defined contribution pension plans covering non-U.S. employees.  Each international office maintains a separate plan for the non-U.S. employees working in that location.  The Company contributes various amounts based on salary, age and/or years of service.  In the current year, the contributions as a percentage of salary for the international offices ranged from 5.3% to 33.5%.  The contributions are generally used to purchase pension benefits from local insurance providers.  The Company incurred expenses related to these plans of $9 million, $6 million and $4 million for the years ended December 31, 2024, 2023 and 2022, respectively.
Post-Retirement Plan.
The Company sponsors a Retiree Health Plan for employees employed prior to April 1, 2010.  This plan provides healthcare benefits for eligible retired employees (and their eligible dependents), who have elected coverage.  The Company anticipates that most covered employees will become eligible for these benefits if they retire while working for
the Company.  The cost of these benefits is shared with the retiree.  The Company accrues the post-retirement benefit expense during the period of the employee’s service. A medical cost trend rate of 6.75% in 2024 was assumed to decrease gradually to 4.75% in 2030 and then remain at that level. The Company incurred expenses of $(0.4) million, $(1) million and $1 million for the years ended December 31, 2024, 2023 and 2022, respectively.
The following table summarizes the status of this plan for the periods indicated:
At December 31,
(Dollars in millions)20242023
Change in projected benefit obligation:
Benefit obligation at beginning of year$22 $21 
Service cost— 1 
Interest cost1 1 
Amendments— — 
Actuarial (gain)/loss(1)(1)
Benefits paid(1)— 
Benefit obligation at end of year21 22 
Change in plan assets:
Fair value of plan assets at beginning of year— — 
Employer contributions1 — 
Benefits paid(1)— 
Fair value of plan assets at end of year— — 
Funded status at end of year$(21)$(22)
Amounts recognized in the consolidated balance sheets for the periods indicated:
At December 31,
(Dollars in millions)20242023
Other liabilities (due within one year)$(1)$(1)
Other liabilities (due beyond one year)(21)(21)
Net amount recognized in the consolidated balance sheets$(21)$(22)
(Some amounts may not reconcile due to rounding.)

Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive income (loss) for the periods indicated:
At December 31,
(Dollars in millions)20242023
Accumulated income (loss)$11 $11 
Accumulated prior service credit (cost)— 1 
Accumulated other comprehensive income (loss)$12 $12 
Other changes in other comprehensive income (loss) for the periods indicated are as follows:
Years Ended December 31,
(Dollars in millions)20242023
Other comprehensive income (loss) at December 31, prior year$12 $14 
Net gain (loss) arising during period1 1 
Prior Service credit (cost) arising during period— — 
Recognition of amortizations in net periodic benefit cost:
Actuarial loss (gain)(1)(2)
Prior service cost— — 
Other comprehensive income (loss) at December 31, current year$12 $12 
Net periodic benefit cost included the following components for the periods indicated:
Years Ended December 31,
(Dollars in millions)202420232022
Service cost$— $1 $1 
Interest cost1 1 1 
Prior service credit recognition— — — 
Net gain recognition(1)(2)— 
Net periodic cost$— $(1)$1 
Other changes recognized in other comprehensive income (loss):
Other comprehensive gain (loss) attributable to change from prior year1 2 
Total recognized in net periodic benefit cost and
other comprehensive income (loss)$— $1 
(Some amounts may not reconcile due to rounding.)
The weighted average discount rates used to determine net periodic benefit cost for 2024, 2023 and 2022 were 5.00%, 5.25% and 2.86%, respectively.
The weighted average discount rates used to determine the actuarial present value of the projected benefit obligation at year-end 2024, 2023 and 2022 were 5.64%, 5.00% and 5.25%, respectively.
The following table displays the expected benefit payments in the years indicated:
(Dollars in millions)
2025$1 
20261 
20271 
20281 
20291 
Next 5 years7