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Retirement and Deferred Compensation Plans | 12 Months Ended
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Dec. 31, 2025
Retirement Benefits [Abstract] |
Retirement and Deferred Compensation Plans | (9) Retirement and Deferred Compensation Plans For all of our United States defined benefit and retiree health care plans, we adopted the Society of Actuaries’ Pri-2012 Mortality Table with MP-2021 Mortality Improvement Scale in determining the plans’ benefit obligations as of December 31, 2025. Defined Benefit Pension Plans We sponsor qualified and nonqualified pension plans covering permanent employees in several countries. In our Switzerland pension plan, we recognized a partial settlement as a result of local regulations and turnover common to our industry and reclassified pension losses of $2.0, $3.8 and $5.8 in 2025, 2024 and 2023, respectively, net of tax, recorded in other comprehensive loss in t he Consolidated Statements of Comprehensive Income. The re conciliation of the changes in the plans’ benefit obligations, the fair value of plan assets and the funded status of the plans are as follows:
|  | United States Plans |  |  | Non-United States Plans |
Year Ended December 31 |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Change in Benefit Obligation |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation, beginning of year |  | $ | 18.0 |  |  | $ | 19.2 |  |  | $ | 669.8 |  |  | $ | 713.2 |
Service cost |  |  | — |  |  |  | — |  |  |  | 15.4 |  |  |  | 16.5 |
Interest cost |  |  | 0.9 |  |  |  | 0.9 |  |  |  | 19.0 |  |  |  | 18.5 |
Curtailments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (2.7 | )
Settlements |  |  | — |  |  |  | — |  |  |  | (49.5 | ) |  |  | (50.9 | )
Transfers |  |  | — |  |  |  | — |  |  |  | 31.3 |  |  |  | 26.5 |
Actuarial loss (gain) |  |  | 1.0 |  |  |  | — |  |  |  | (42.9 | ) |  |  | (3.9 | )
Plan participant contributions |  |  | — |  |  |  | — |  |  |  | 11.6 |  |  |  | 11.4 |
Benefits paid |  |  | (2.1 | ) |  |  | (2.1 | ) |  |  | (18.1 | ) |  |  | (16.0 | )
Currency exchange rate changes |  |  | — |  |  |  | — |  |  |  | 87.7 |  |  |  | (42.8 | )
Benefit obligation, end of year |  | $ | 17.8 |  |  | $ | 18.0 |  |  | $ | 724.3 |  |  | $ | 669.8 |
|  | United States Plans |  |  | Non-United States Plans |
Year Ended December 31 |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Change in Plan Assets |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets, beginning of year |  | $ | — |  |  | $ | — |  |  | $ | 586.1 |  |  | $ | 596.3 |
Actual return on plan assets |  |  | — |  |  |  | — |  |  |  | 12.6 |  |  |  | 40.7 |
Settlements |  |  | — |  |  |  | — |  |  |  | (49.5 | ) |  |  | (50.9 | )
Transfers |  |  | — |  |  |  | — |  |  |  | 31.6 |  |  |  | 23.7 |
Plan participant contributions |  |  | — |  |  |  | — |  |  |  | 11.6 |  |  |  | 11.4 |
Company contributions |  |  | 2.1 |  |  |  | 2.1 |  |  |  | 18.5 |  |  |  | 17.4 |
Benefits paid |  |  | (2.1 | ) |  |  | (2.1 | ) |  |  | (18.1 | ) |  |  | (16.0 | )
Currency exchange rate changes |  |  | — |  |  |  | — |  |  |  | 78.0 |  |  |  | (36.5 | )
Fair value of plan assets, end of year |  | $ | — |  |  | $ | — |  |  | $ | 670.8 |  |  | $ | 586.1 |
Funded Status at End of Year |  |  |  |  |  |  |  |  |  |  |  |
Funded status, end of year |  | $ | (17.8 | ) |  | $ | (18.0 | ) |  | $ | (53.5 | ) |  | $ | (83.7 | )
Amounts Recognized |  |  |  |  |  |  |  |  |  |  |  |
Noncurrent assets |  | $ | — |  |  | $ | — |  |  | $ | 42.2 |  |  | $ | 22.7 |
Current liabilities |  |  | (2.1 | ) |  |  | (2.2 | ) |  |  | (0.8 | ) |  |  | (1.2 | )
Noncurrent liabilities |  |  | (15.7 | ) |  |  | (15.8 | ) |  |  | (94.9 | ) |  |  | (105.2 | )
Net amount recognized |  | $ | (17.8 | ) |  | $ | (18.0 | ) |  | $ | (53.5 | ) |  | $ | (83.7 | )
The curtailments in 2024 primarily resulted from the wind down of Proservia Germany. For both 2025 and 2024, the settlements and transfers mostly represent transfers in and out of temporary associates within our Switzerland plan. The actuarial gain and loss are mainly related to changes in discount rates. One of our plans is located in the United Kingdom. In July 2024, the United Kingdom Court of Appeal upheld a ruling in the Virgin Media vs. NTL Pension Trustee case, a decision in which we were not a party, that certain historical amendments for contracted-out defined benefit schemes were invalid if they were not accompanied by the correct actuarial confirmation. In June 2025, the Department for Work and Pensions confirmed that the government will introduce legislation allowing affected pension schemes to retrospectively obtain written actuarial confirmation that historic benefit changes met the necessary standards. We have agreed with our plan trustees that, if needed, we intend to utilize this legislation when introduced. Since there remain significant areas of uncertainty, we are unable to determine the impact of the ruling, if any, on our pension plan obligations as of December 31, 2025. Amounts recognized in AOCL, net of tax, consisted of:
|  | United States Plans |  |  | Non-United States Plans |
Year Ended December 31 |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net loss (gain) |  | $ | 4.2 |  |  | $ | 3.6 |  |  | $ | (31.4 | ) |  | $ | 1.2 |
Prior service cost |  |  | — |  |  |  | — |  |  |  | 3.2 |  |  |  | 4.1 |
Total |  | $ | 4.2 |  |  | $ | 3.6 |  |  | $ | (28.2 | ) |  | $ | 5.3 |
The accumulated benefit obligation (ABO) for all qualified defined benefit pension plan s was $717.9 and $663.7 as of December 31, 2025 and 2024, respectively. The ABO for plans that have plan assets was $634.3 and $584.4 as of December 31, 2025 and 2024, respectively. The accumulated benefit obligation for some of our plans exceeded the fair value of plan assets as follows:
December 31 |  | 2025 |  |  | 2024 |
Accumulated benefit obligation |  | $ | 28.9 |  |  | $ | 117.2 |
Plan assets |  |  | 20.5 |  |  |  | 93.4 |
In 2025, one of our larger plans merged with a smaller funded plan. As a result of the transfer of assets and obligations from the merged plan, the surviving plan's assets exceeded its accumulated benefit obligation as of December 31, 2025. As a result, this plan was included in the amounts disclosed above for 2024 but not for 2025. The projected benefit obligation (PBO) for all qualified defined benefit pension plans w as $742.1 and $687.8 as of December 31, 2025 and 2024, respectively. The PBO for some of our plans exceeded the fair value of plan assets as follows:
December 31 |  | 2025 |  |  | 2024 |
Projected benefit obligation |  | $ | 31.9 |  |  | $ | 123.8 |
Plan assets |  |  | 20.5 |  |  |  | 96.9 |
By their nature, some of our plans do not have plan assets. The accumulated benefit obligation for these plans was $83.6 and $79.3 as of December 31, 2025 and 2024, respectively. The components of the net periodic benefit cost and other amounts recognized in other comprehensive income/loss for all plans were as follows:
Year Ended December 31 |  | 2025 |  |  | 2024 |  |  | 2023 |
Net Periodic Benefit Cost |  |  |  |  |  |  |  |  |
Service cost |  | $ | 15.4 |  |  | $ | 16.5 |  |  | $ | 15.5 |
Interest cost |  |  | 19.9 |  |  |  | 19.4 |  |  |  | 21.1 |
Expected return on assets |  |  | (20.7 | ) |  |  | (18.9 | ) |  |  | (19.0 | )
Settlements |  |  | 2.6 |  |  |  | 1.8 |  |  |  | 6.7 |
Net loss (gain) |  |  | 0.3 |  |  |  | (1.5 | ) |  |  | (3.3 | )
Prior service cost |  |  | 0.7 |  |  |  | 0.7 |  |  |  | 0.7 |
Net periodic benefit cost |  |  | 18.2 |  |  |  | 18.0 |  |  |  | 21.7 |
Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income/Loss |  |  |  |  |  |  |  |  |
Net (gain) loss |  |  | (33.7 | ) |  |  | (25.7 | ) |  |  | 31.9 |
Prior service credit |  |  | — |  |  |  | — |  |  |  | (1.2 | )
Amortization of net loss |  |  | (2.9 | ) |  |  | (3.0 | ) |  |  | (3.7 | )
Amortization of prior service cost |  |  | (0.7 | ) |  |  | (0.7 | ) |  |  | (0.7 | )
Total recognized in other comprehensive income/loss |  |  | (37.3 | ) |  |  | (29.4 | ) |  |  | 26.3 |
Total recognized in net periodic benefit cost and other comprehensive income/loss |  | $ | (19.1 | ) |  | $ | (11.4 | ) |  | $ | 48.0 |
The estimated net gain and prior service cost for the defined benefit pension plans that will be amortized from AOCL into net periodic benefit cost during 2026 are $0.6 and $0.7, respective ly. The weighted-average assumptions used in the measurement of the benefit obligation were as follows:
|  | United States Plans |  |  | Non-United States Plans |
Year Ended December 31 |  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Discount rate |  |  | 5.0 | % |  |  | 5.5 | % |  |  | 3.1 | % |  |  | 2.7 | %
Rate of compensation increase |  |  | 1.4 | % |  |  | 1.4 | % |  |  | 1.4 | % |  |  | 1.5 | %
The weighted-average assumptions used in the measurement of the net periodic benefit cost were as follows:
|  | United States Plans |  |  | Non-United States Plans |
Year Ended December 31 |  | 2025 |  |  | 2024 |  |  | 2023 |  |  | 2025 |  |  | 2024 |  |  | 2023 |
Discount rate |  |  | 5.5 | % |  |  | 5.2 | % |  |  | 5.4 | % |  |  | 2.7 | % |  |  | 2.7 | % |  |  | 3.2 | %
Expected long-term return on plan assets |  | N/A |  |  | N/A |  |  | N/A |  |  |  | 3.4 | % |  |  | 3.4 | % |  |  | 3.5 | %
Rate of compensation increase |  |  | 1.4 | % |  |  | 1.4 | % |  |  | 1.3 | % |  |  | 1.5 | % |  |  | 1.9 | % |  |  | 1.9 | %
Interest crediting rates for cash balance plans |  | N/A |  |  | N/A |  |  | N/A |  |  |  | 1.8 | % |  |  | 2.6 | % |  |  | 2.6 | %
We determine our assumption for the discount rate based on an index of high-quality corporate bond yields and matched-funding yield curve analysis as of the end of each fiscal year. Our overall expected long-term rate of return used in the measurement of the 2025 net periodic benefit cost on non-United States plans varied by country and ranged from 2.5% to 5.9%. For a majority of our plans, a building block approach has been employed to establish this return. Historical markets are studied and long-term historical relationships between equity securities and fixed income instruments are preserved, consistent with the widely accepted capital market principle that assets with higher volatility generate a greater return over time. Current market factors such as inflation and interest rates are evaluated before long-term capital market assumptions are determined. The long-term portfolio return is established with proper consideration of diversification and rebalancing. We also use guaranteed insurance contracts for five of our foreign plans. Peer data and historical returns are reviewed to check for reasonableness and appropriateness of our expected rate of return. None of our United States plans has plan assets. Projected salary levels utilized in the determination of the projected benefit obligation for the pension plans are based upon historical experience and the future expectations for each respective country. Our plans’ investment policies are to optimize the long-term return on plan assets at an acceptable level of risk and to maintain careful control of the risk level within each asset class. Our long-term objective is to minimize plan expenses and contributions by outperforming plan liabilities. We have historically used a balanced portfolio strategy based primarily on a target allocation of equity securities and fixed-income instruments, which vary by location. These target allocations, which are similar to the 2025 allocations, are determined based on the favorable risk tolerance characteristics of the plan and, at times, may be adjusted within a specified range to advance our overall objective. The fair values of our Level 1 and Level 2 pension plan assets are primarily determined by using market quotes and other relevant information that is generated by market transactions involving identical or comparable assets. Insurance contracts and annuity contracts are measured at the present value of expected future benefit payments primarily using associated interest curves. Hedge funds consist of a number of diversified funds including those investing in international securities, equity and private partnership interests valued using market available data and various models and assumptions. The fair value of our pension plan assets by asset category was as follows:
|  | Fair Value Measurements Using |
|  | December 31, 2025 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Asset Category |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 12.5 |  |  | $ | 12.5 |  |  | $ | — |  |  | $ | — |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds |  |  | 178.0 |  |  |  | 178.0 |  |  |  | — |  |  |  | — |
Common stock |  |  | 35.9 |  |  |  | 35.9 |  |  |  | — |  |  |  | — |
Fixed income instruments: |  |  |  |  |  |  |  |  |  |  |  |
Fixed income funds |  |  | 151.7 |  |  |  | — |  |  |  | 151.7 |  |  |  | — |
Annuity contract |  |  | 32.4 |  |  |  | — |  |  |  | — |  |  |  | 32.4 |
Guaranteed insurance contracts |  |  | 30.2 |  |  |  | — |  |  |  | 30.2 |  |  |  | — |
Other types of investments: |  |  |  |  |  |  |  |  |  |  |  |
Real estate funds |  |  | 102.7 |  |  |  | — |  |  |  | 101.3 |  |  |  | 1.4 |
Insurance contracts |  |  | 76.0 |  |  |  | — |  |  |  | — |  |  |  | 76.0 |
Hedge funds |  |  | 27.3 |  |  |  | — |  |  |  | 21.7 |  |  |  | 5.6 |
Other |  |  | 24.1 |  |  |  | — |  |  |  | 4.4 |  |  |  | 19.7 |
|  | $ | 670.8 |  |  | $ | 226.4 |  |  | $ | 309.3 |  |  | $ | 135.1 |
|  | Fair Value Measurements Using |
|  | December 31, 2024 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Asset Category |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 3.0 |  |  | $ | 3.0 |  |  | $ | — |  |  | $ | — |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds |  |  | 142.7 |  |  |  | 142.7 |  |  |  | — |  |  |  | — |
Common stock |  |  | 30.1 |  |  |  | 30.1 |  |  |  | — |  |  |  | — |
Fixed income instruments: |  |  |  |  |  |  |  |  |  |  |  |
Fixed income funds |  |  | 123.8 |  |  |  | — |  |  |  | 123.8 |  |  |  | — |
Annuity contract |  |  | 31.4 |  |  |  | — |  |  |  | — |  |  |  | 31.4 |
Guaranteed insurance contracts |  |  | 25.6 |  |  |  | — |  |  |  | 25.6 |  |  |  | — |
Other types of investments: |  |  |  |  |  |  |  |  |  |  |  |
Real estate funds |  |  | 96.4 |  |  |  | — |  |  |  | 95.1 |  |  |  | 1.3 |
Insurance contracts |  |  | 80.9 |  |  |  | — |  |  |  | — |  |  |  | 80.9 |
Hedge funds |  |  | 29.0 |  |  |  | — |  |  |  | 11.5 |  |  |  | 17.5 |
Other |  |  | 23.2 |  |  |  | — |  |  |  | 3.6 |  |  |  | 19.6 |
|  | $ | 586.1 |  |  | $ | 175.8 |  |  | $ | 259.6 |  |  | $ | 150.7 |
The following table summarizes the changes in fair value of the pension assets that are measured using Level 3 inputs. We determined that transfers between fair-value-measurement levels occurred on the date of the event that caused the transfer.
Year Ended December 31 |  | 2025 |  |  | 2024 |
Balance, beginning of year |  | $ | 150.7 |  |  | $ | 154.3 |
Actual return on plan assets |  |  | (15.9 | ) |  |  | 4.4 |
Purchases, sales and settlements, net |  |  | (17.6 | ) |  |  | — |
Currency exchange rate changes |  |  | 17.9 |  |  |  | (8.0 | )
Balance, end of year |  | $ | 135.1 |  |  | $ | 150.7 |
Retiree Health Care Plan We provide medical and dental benefits to certain eligible retired employees in the United States. Due to the nature of the plan, there are no plan assets. The reconciliation of the changes in the plan’s benefit obligation and the statement of the funded status of the plan were as follows:
Year Ended December 31 |  | 2025 |  |  | 2024 |
Change in Benefit Obligation |  |  |  |  |  |
Benefit obligation, beginning of year |  | $ | 8.8 |  |  | $ | 10.2 |
Interest cost |  |  | 0.4 |  |  |  | 0.5 |
Actuarial loss (gain) |  |  | 0.4 |  |  |  | (1.1 | )
Benefits paid |  |  | (0.7 | ) |  |  | (0.8 | )
Benefit obligation, end of year |  | $ | 8.9 |  |  | $ | 8.8 |
Funded Status at End of Year |  |  |  |  |  |
Funded status, end of year |  | $ | (8.9 | ) |  | $ | (8.8 | )
Amounts Recognized |  |  |  |  |  |
Current liabilities |  | $ | (1.0 | ) |  | $ | (1.0 | )
Noncurrent liabilities |  |  | (7.9 | ) |  |  | (7.8 | )
Net amount recognized |  | $ | (8.9 | ) |  | $ | (8.8 | )
The amount recognized in AOCL, net of tax, consists of a net gain of $0.8 and $1.1 as of December 31, 2025 and 2024, respectively, and a prior service cost of $0.2 and a credit of $0.4 as of December 31, 2025 and 2024, respectively. The discount rate used in the measurement of the benefit obligation was 5.1% and 5.5% in 2025 and 2024, respectively. The discount rate used in the measurement of net periodic benefit cost was 5.5%, 4.9% and 5.1% in 2025, 2024 and 2023, respectively. The components of net periodic benefit credit and other amounts recognized in other comprehensive income/loss for this plan were as follows:
Year Ended December 31 |  | 2025 |  |  | 2024 |  |  | 2023 |
Net Periodic Benefit Credit |  |  |  |  |  |  |  |  |
Interest cost |  | $ | 0.4 |  |  | $ | 0.5 |  |  | $ | 0.5 |
Prior service credit |  |  | (0.8 | ) |  |  | (0.8 | ) |  |  | (0.8 | )
Net periodic benefit credit |  | $ | (0.4 | ) |  | $ | (0.3 | ) |  | $ | (0.3 | )
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income/Loss |  |  |  |  |  |  |  |  |
Net loss (gain) |  | $ | 0.4 |  |  | $ | (1.1 | ) |  | $ | (1.0 | )
Amortization of prior service credit |  |  | 0.8 |  |  |  | 0.8 |  |  |  | 0.8 |
Total recognized in other comprehensive income/loss |  |  | 1.2 |  |  |  | (0.3 | ) |  |  | (0.2 | )
Total recognized in net periodic benefit cost and other comprehensive income/loss |  | $ | 0.8 |  |  | $ | (0.6 | ) |  | $ | (0.5 | )
The estimated prior service credit for the retiree health care plan that will be amortized from AOCL into net periodic benefit cost during 2026 is $0.8. The health care cost trend rate is assumed to be 7.8% in 2026, decreasing gradually to an ultimate rate of 4.5% in 2036. Assumed health care cost trend rates are not expected to have a material effect on the amounts reported. Future Contributions and Payments During 2026, we plan to contribute approximately $17.0 to ou r pension plans and to fund our retiree health care payments as incurred. Projected benefit payments from the plans as of December 31, 2025 were estimated as follows:
Year |  | Pension Plans |  |  | Retiree Health Care Plan |
2026 |  | $ | 72.7 |  |  | $ | 1.0 |
2027 |  |  | 47.1 |  |  |  | 1.0 |
2028 |  |  | 38.0 |  |  |  | 0.9 |
2029 |  |  | 35.2 |  |  |  | 0.9 |
2030 |  |  | 36.3 |  |  |  | 0.9 |
2031–2035 |  |  | 201.7 |  |  |  | 3.6 |
Total projected benefit payments |  | $ | 431.0 |  |  | $ | 8.3 |
Defined Contribution Plans and Deferred Compensation Plans We have defined contribution plans covering substantially all permanent United States employees and various other employees throughout the world. With our company-sponsored plans, employees may elect to contribute a portion of their salary to the plans and we match a portion of their contributions up to a maximum percentage of the employee’s salary. In addition, profit sharing contributions are made if a targeted earnings level is reached at management’s discretion. The total expense for our match and any profit sharing contributions was $16.1, $17.8 and $19.2 for the years ended December 31, 2025, 2024 and 2023, respectively. In certain countries with statutory defined contribution plans, we pay a percentage of the employees' salary in pension premiums. The total expense for the statutory defined contribution plans was $21.2, $24.4 and $29.5 for the years ended December 31, 2025, 2024 and 2023, respectively. We also have deferred compensation plans in the United States. These plans had an asset and liability of $188.6 and $165.4 as of December 31, 2025 and 2024, respectively. We recognized investment gains of $23.3, $21.7 and $21.9 in 2025, 2024 and 2023, respectively. These fair value adjustments are fully offset by corresponding impact to compensation expense within selling and administrative expenses.

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