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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Employee Benefit Plans |
Schedule of the Fair Value of Plan Assets by Asset Class | Actual asset allocation percentages of each class of our domestic and foreign pension plan assets as of December 31, 2024 and 2023, along with the current targeted asset investment allocation percentages, each of which is based on the midpoint of an allocation range, were as follows: Domestic Pension Plans
| Actual Allocations |  | Mid-point of Target Allocation Range
| 2024 |  | 2023 |  | 2024
Fixed income common trust funds | 66 | % |  | 53 | % |  | 66 | %
Commingled global fund allocation | 5 | % |  | 4 | % |  | 5 | %
Global equity common trust funds | 19 | % |  | 19 | % |  | 20 | %
U.S. Government securities | 8 | % |  | 20 | % |  | 9 | %
Short-term investments and other (1) | 2 | % |  | 4 | % |  | — | %
Total | 100 | % |  | 100 | % |  | 100 | %
___________________________________________________________________ (1)Short-term investments are generally invested in actively managed common trust funds or interest-bearing accounts. Foreign Pension Plans
| Actual Allocations |  | Mid-point of Target Allocation Range
| 2024 |  | 2023 |  | 2024
Global equity common trust funds | 6 | % |  | 3 | % |  | 6 | %
Fixed income common trust funds | 76 | % |  | 73 | % |  | 85 | %
Commingled global fund allocation | 10 | % |  | 15 | % |  | 9 | %
Short-term investments (1) | 8 | % |  | 9 | % |  | — | %
Total | 100 | % |  | 100 | % |  | 100 | %
___________________________________________________________________ (1)Short-term investments are generally invested in actively managed common trust funds or interest-bearing accounts.
Schedule of Net Periodic Benefit (Income) Expense | Net periodic pension benefit (income) expense for our domestic and foreign pension plans included the following components: Domestic Pension Plans
| Year ended December 31,
| 2024 |  | 2023 |  | 2022
Service cost | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 12.1 |  |  | 13.0 |  |  | 10.5 |
Expected return on plan assets | (8.8) |  |  | (8.8) |  |  | (8.2) |
Amortization of unrecognized prior service credits | — |  |  | — |  |  | (0.1) |
Recognized net actuarial (gains) losses (1) | 1.4 |  |  | 5.6 |  |  | (1.6) |
Total net periodic pension benefit expense | $ | 4.7 |  |  | $ | 9.8 |  |  | $ | 0.6 |
___________________________________________________________________ (1)Consists primarily of our reported actuarial (gains) losses, the difference between actual and expected returns on plan assets, and settlement losses. Foreign Pension Plans
| Year ended December 31,
| 2024 |  | 2023 |  | 2022
Service cost | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 5.6 |  |  | 5.6 |  |  | 3.7 |
Expected return on plan assets | (5.1) |  |  | (6.4) |  |  | (5.6) |
Amortization of unrecognized prior service costs | — |  |  | — |  |  | 0.1 |
Recognized net actuarial losses (1) | 1.1 |  |  | 5.5 |  |  | 6.4 |
Total net periodic pension benefit expense | $ | 1.6 |  |  | $ | 4.7 |  |  | $ | 4.6 |
___________________________________________________________________ (1)Consists primarily of our reported actuarial losses and the difference between actual and expected returns on plan assets.
Pension plans |
Employee Benefit Plans |
Schedule of the Fair Value of Plan Assets by Asset Class | The fair values of pension plan assets at December 31, 2024, by asset class, were as follows:
| Total |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Asset class: |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |
Fixed income common trust funds (1) (2) | $ | 179.2 |  |  | $ | — |  |  | $ | 179.2 |  |  | $ | — |
U.S. Government securities | 13.1 |  |  | — |  |  | 13.1 |  |  | — |
Equity securities: |  |  |  |  |  |  |
Global equity common trust funds (1) (3) | 35.2 |  |  | — |  |  | 35.2 |  |  | — |
Alternative investments: |  |  |  |  |  |  |
Commingled global fund allocations (1) (4) | 16.8 |  |  | — |  |  | 16.8 |  |  | — |
Other: |  |  |  |  |  |  |
Short-term investments (5) | 10.6 |  |  | 4.3 |  |  | 6.3 |  |  | — |
Other | 0.9 |  |  | — |  |  | — |  |  | 0.9 |
Total | $ | 255.8 |  |  | $ | 4.3 |  |  | $ | 250.6 |  |  | $ | 0.9 |
The fair values of pension plan assets at December 31, 2023, by asset class, were as follows:
| Total |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Asset class: |  |  |  |  |  |  |
Debt securities: |  |  |  |  |  |  |
Fixed income common trust funds (1) (2) | $ | 180.3 |  |  | $ | — |  |  | $ | 180.3 |  |  | $ | — |
U.S. Government securities | 34.4 |  |  | — |  |  | 34.4 |  |  | — |
Equity securities: |  |  |  |  |  |  |
Global equity common trust funds (1) (3) | 36.4 |  |  | — |  |  | 36.4 |  |  | — |
Alternative Investments: |  |  |  |  |  |  |
Commingled global fund allocations (1) (4) | 26.1 |  |  | — |  |  | 26.1 |  |  | — |
Other: |  |  |  |  |  |  |
Short-term investments (5) | 17.4 |  |  | 14.7 |  |  | 2.7 |  |  | — |
Other | 0.9 |  |  | — |  |  | — |  |  | 0.9 |
Total | $ | 295.5 |  |  | $ | 14.7 |  |  | $ | 279.9 |  |  | $ | 0.9 |
___________________________________________________________________ (1)Common/commingled trust funds are similar to mutual funds, with a daily net asset value per share measured by the fund sponsor and used as the basis for current transactions. These investments, however, are not registered with the U.S. Securities and Exchange Commission and participation is not open to the public. The funds are valued at the net asset value per share multiplied by the number of shares held as of the measurement date. (2)This class represents investments in actively managed common trust funds that invest in a variety of fixed income investments, which may include corporate bonds, both U.S. and non-U.S. municipal and government securities, interest rate swaps, options and futures. (3)This class represents investments in actively managed common trust funds that invest primarily in equity securities, which may include common stocks, options and futures. (4)This class represents investments in actively managed common trust funds with investments in both equity and debt securities. The investments may include common stock, corporate bonds, U.S. and non-U.S. municipal securities, interest rate swaps, options and futures. (5)Amounts are generally invested in actively managed common trust funds or interest-bearing accounts.
Schedule of Estimated Minimum Benefit Payments | Following is a summary, as of December 31, 2024, of the estimated future benefit payments for our pension plans in each of the next five fiscal years and in the aggregate for five fiscal years thereafter. Benefit payments are paid from plan assets or directly by us for our non-funded plans. The expected benefit payments are estimated based on the same assumptions used at December 31, 2024 to measure our obligations. Estimated future benefit payments: (Domestic and foreign pension plans)
| Domestic Pension Benefits |  | Foreign Pension Benefits
2025 (1) | $ | 25.8 |  |  | $ | 30.7 |
2026 | 25.7 |  |  | 4.0 |
2027 | 24.1 |  |  | 4.3 |
2028 | 22.2 |  |  | 4.2 |
2029 | 21.9 |  |  | 4.2 |
Subsequent five years | 86.8 |  |  | 25.4 |
_________________________ (1) Payments for the foreign pension plans include amounts payable of $26.5 in connection with the Canadian Pension Plans wind-up mentioned above.
Schedule of Funded Status of the Pension Plans and Amounts Recognized in Consolidated Balance Sheets | The following tables show the domestic and foreign pension plans’ funded status and amounts recognized in our consolidated balance sheets:
| Domestic Pension Plans |  | Foreign Pension Plans
| 2024 |  | 2023 |  | 2024 |  | 2023
Change in projected benefit obligation: |  |  |  |  |  |  |
Projected benefit obligation — beginning of year | $ | 245.7 |  |  | $ | 246.9 |  |  | $ | 120.2 |  |  | $ | 109.5 |
Service cost | — |  |  | — |  |  | — |  |  | — |
Interest cost | 12.1 |  |  | 13.0 |  |  | 5.6 |  |  | 5.6 |
Actuarial (gains) losses | (6.1) |  |  | 7.6 |  |  | (7.4) |  |  | 5.4 |
Settlements | (0.2) |  |  | — |  |  | — |  |  | — |
Benefits paid | (25.4) |  |  | (21.8) |  |  | (15.6) |  |  | (6.6) |
Foreign exchange and other | — |  |  | — |  |  | (3.3) |  |  | 6.3 |
Projected benefit obligation — end of year | $ | 226.1 |  |  | $ | 245.7 |  |  | $ | 99.5 |  |  | $ | 120.2 |
The actuarial gains and losses for all pension plans in 2024 and 2023 were primarily related to a change in the discount rate used to measure the benefit obligations of those plans.
| Domestic Pension Plans |  | Foreign Pension Plans
| 2024 |  | 2023 |  | 2024 |  | 2023
Change in plan assets: |  |  |  |  |  |  |
Fair value of plan assets — beginning of year | $ | 171.3 |  |  | $ | 176.8 |  |  | $ | 124.2 |  |  | $ | 115.9 |
Actual return on plan assets | 1.3 |  |  | 10.9 |  |  | (2.4) |  |  | 6.9 |
Contributions (employer and employee) | 5.5 |  |  | 5.4 |  |  | 1.6 |  |  | 1.8 |
Settlements | (0.2) |  |  | — |  |  | — |  |  | — |
Benefits paid | (25.4) |  |  | (21.8) |  |  | (15.6) |  |  | (6.6) |
Foreign exchange and other | — |  |  | — |  |  | (4.5) |  |  | 6.2 |
Fair value of plan assets — end of year | $ | 152.5 |  |  | $ | 171.3 |  |  | $ | 103.3 |  |  | $ | 124.2 |
Funded status at year-end | $ | (73.6) |  |  | $ | (74.4) |  |  | $ | 3.8 |  |  | $ | 4.0 |
Amounts recognized in the consolidated balance sheets consist of: |  |  |  |  |  |  |
Other assets | $ | 1.7 |  |  | $ | 1.9 |  |  | $ | 3.9 |  |  | $ | 4.1 |
Accrued expenses | (4.9) |  |  | (5.1) |  |  | — |  |  | — |
Other long-term liabilities | (70.4) |  |  | (71.2) |  |  | (0.1) |  |  | (0.1) |
Net amount recognized | $ | (73.6) |  |  | $ | (74.4) |  |  | $ | 3.8 |  |  | $ | 4.0 |
Amount recognized in accumulated other comprehensive income (pre-tax) consists of — net prior service costs | $ | — |  |  | $ | — |  |  | $ | 1.0 |  |  | $ | 1.0 |
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets | The following is information about our pension plans that had accumulated benefit obligations in excess of the fair value of their plan assets at December 31, 2024 and 2023:
| Domestic Pension Plans |  | Foreign Pension Plans
| 2024 |  | 2023 |  | 2024 |  | 2023
Projected benefit obligation | $ | 221.7 |  |  | $ | 241.1 |  |  | $ | 0.1 |  |  | $ | 0.1 |
Accumulated benefit obligation | 221.7 |  |  | 241.1 |  |  | 0.1 |  |  | 0.1 |
Fair value of plan assets | 146.4 |  |  | 164.8 |  |  | — |  |  | — |
Schedule of Actuarial Assumptions Used in Accounting for Pension Plans | Actuarial assumptions used in accounting for our domestic and foreign pension plans were as follows:
| Year ended December 31,
| 2024 |  | 2023 |  | 2022
Domestic Pension Plans |  |  |  |  |
Weighted-average actuarial assumptions used in determining net periodic pension expense: |  |  |  |  |
Discount rate (1) | 5.18 | % |  | 5.54 | % |  | 3.99 | %
Rate of increase in compensation levels | N/A |  | N/A |  | N/A
Expected long-term rate of return on assets | 5.47 | % |  | 5.23 | % |  | 3.23 | %
Weighted-average actuarial assumptions used in determining year-end benefit obligations: |  |  |  |  |
Discount rate | 5.57 | % |  | 5.18 | % |  | 5.54 | %
Rate of increase in compensation levels | N/A |  | N/A |  | N/A
Foreign Pension Plans |  |  |  |  |
Weighted-average actuarial assumptions used in determining net periodic pension expense: |  |  |  |  |
Discount rate | 4.83 | % |  | 5.15 | % |  | 2.19 | %
Rate of increase in compensation levels | N/A |  | N/A |  | N/A
Expected long-term rate of return on assets | 5.20 | % |  | 6.08 | % |  | 3.44 | %
Weighted-average actuarial assumptions used in determining year-end benefit obligations: |  |  |  |  |
Discount rate | 5.46 | % |  | 4.83 | % |  | 5.15 | %
Rate of increase in compensation levels | N/A |  | N/A |  | N/A
___________________________________________________________________ (1) The discount rate for the year ended December 31, 2022 includes adjustments due to remeasurements in the U.S. Plan during the second and third quarters of 2022.
Postretirement Plans |
Employee Benefit Plans |
Schedule of Funded Status of the Pension Plans and Amounts Recognized in Consolidated Balance Sheets | The following tables show the postretirement plans’ funded status and amounts recognized in our consolidated balance sheets:
| Postretirement Plans
| 2024 |  | 2023
Change in projected postretirement benefit obligation: |  |  |
Projected postretirement benefit obligation — beginning of year | $ | 29.7 |  |  | $ | 32.1 |
Interest cost | 1.2 |  |  | 1.4 |
Actuarial losses | 0.1 |  |  | 0.2 |
Benefits paid | (4.0) |  |  | (4.0) |
Projected postretirement benefit obligation — end of year | $ | 27.0 |  |  | $ | 29.7 |
Funded status at year-end | $ | (27.0) |  |  | $ | (29.7) |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Accrued expenses | $ | (3.3) |  |  | $ | (3.6) |
Other long-term liabilities | (23.7) |  |  | (26.1) |
Net amount recognized | $ | (27.0) |  |  | $ | (29.7) |
Amount recognized in accumulated other comprehensive income (pre-tax) consists of — net prior service credits | $ | (4.1) |  |  | $ | (7.2) |
Schedule of Net Periodic Benefit (Income) Expense | The net periodic postretirement benefit income included the following components:
| Year ended December 31,
| 2024 |  | 2023 |  | 2022
Service cost | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 1.2 |  |  | 1.4 |  |  | 1.1 |
Amortization of unrecognized prior service credits | (3.1) |  |  | (3.9) |  |  | (4.4) |
Settlement loss (1) | — |  |  | — |  |  | 0.7 |
Recognized net actuarial (gains) losses | 0.1 |  |  | 0.2 |  |  | (7.0) |
Net periodic postretirement benefit income | $ | (1.8) |  |  | $ | (2.3) |  |  | $ | (9.6) |
___________________________________________________________________ (1)Relates to the transfer of the retiree life insurance benefits obligation.
Schedule of Estimated Future Benefit Payments and Expected Federal Subsidies | Following is a summary, as of December 31, 2024, of the estimated future benefit payments for our postretirement plans in each of the next five fiscal years and in the aggregate for five fiscal years thereafter. The expected benefit payments are estimated based on the same assumptions used at December 31, 2024 to measure our obligations.
| Postretirement Payments
2025 | $ | 3.4 |
2026 | 3.1 |
2027 | 2.8 |
2028 | 2.5 |
2029 | 2.3 |
Subsequent five years | 13.3 |
Schedule of Actuarial Assumptions Used in Accounting for Plans | Actuarial assumptions used in accounting for our domestic postretirement plans were as follows:
| Year ended December 31,
| 2024 |  | 2023 |  | 2022
Assumed health care cost trend rates: |  |  |  |  |
Health care cost trend rate for next year | 6.50 | % |  | 6.75 | % |  | 7.00 | %
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) | 5.00 | % |  | 5.00 | % |  | 5.00 | %
Year that the rate reaches the ultimate trend rate | 2031 |  | 2031 |  | 2031
Discount rate used in determining net periodic postretirement benefit expense (1) | 5.16 | % |  | 5.50 | % |  | 2.84 | %
Discount rate used in determining year-end postretirement benefit obligation | 5.48 | % |  | 5.16 | % |  | 5.50 | %
_______________________________________ (1) The discount rate for the year ended December 31, 2022 includes an adjustment due to a remeasurement in the Plans that took place in the first quarter of 2022.

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