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Pension Benefit Obligations
 12 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Pension Benefit Obligations Pension Benefit Obligations
In the U.S., the Company sponsors various qualified defined benefit pension plans. Benefits under these plans generally are based on the employee’s years of creditable service and compensation; however, all U.S. defined benefit plans are closed to new participants and have frozen accruals.
The Company also sponsors various non-qualified plans in the U.S.; all of these plans are frozen. Outside the U.S., the Company sponsors various pension plans, which are appropriate to the country in which the Company operates, some of which are government mandated.
The following tables provide reconciliations of the changes in the U.S. and international plans’ benefit obligations, reconciliations of the changes in the fair value of assets for the last three years ended September 30, and reconciliations of the funded status as of September 30 of each year.
Fiscal Year Ended
September 30,
2025		September 30,
2024		September 30,
2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Change in benefit obligation:
Benefit obligation at beginning of year$186.9 $860.4 $181.2 $756.2 $198.1 $791.2 
Service cost— 0.2 — 0.2 — 0.3 
Participant contributions0.1 0.2 0.1 0.3 0.1 0.2 
Interest cost7.9 40.1 9.7 43.7 9.8 47.7 
Benefits and expenses paid(17.1)(46.2)(17.6)(47.7)(17.2)(42.2)
Actuarial loss (gain) (0.2)(69.8)13.5 37.0 (8.8)(112.5)
Plan settlements(0.7)— — (3.2)(1.5)(1.5)
Transfers in— — — — 0.7 — 
Foreign currency translation loss— 4.4 — 73.9 — 73.0 
Benefit obligation at end of year$176.9 $789.3 $186.9 $860.4 $181.2 $756.2 
Fiscal Year Ended
September 30,
2025		September 30,
2024		September 30,
2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Change in plan assets
Fair value of plan assets at beginning of year$109.0 $804.3 $98.8 $673.3 $101.4 $683.5 
Actual return on plan assets3.0 (15.1)15.8 89.0 7.8 (54.2)
Employer contributions10.6 23.7 11.9 25.1 8.2 24.8 
Participant contributions0.1 0.2 0.1 0.3 0.1 0.2 
Benefits and expenses paid(17.1)(46.2)(17.6)(47.7)(17.2)(42.2)
Plan settlements(0.7)— — (3.2)(1.5)(1.5)
Foreign currency translation gain— 5.0 — 67.5 — 62.7 
Fair value of plan assets at end of year$104.9 $771.9 $109.0 $804.3 $98.8 $673.3 
Fiscal Year Ended
September 30, 2025September 30, 2024September 30, 2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Reconciliation of funded status:
Funded status at end of year$(72.0)$(17.4)$(77.9)$(56.1)$(82.4)$(82.9)
Contribution made after measurement date N/AN/AN/AN/AN/AN/A
Net amount recognized at end of year$(72.0)$(17.4)$(77.9)$(56.1)$(82.4)$(82.9)
The following table sets forth the amounts recognized in the consolidated balance sheets as of September 30, 2025, 2024 and 2023:
Fiscal Year Ended
September 30, 2025September 30, 2024September 30, 2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Amounts recognized in the consolidated balance sheets:
Other non-current assets$— $52.3 $— $46.6 $— $38.7 
Accrued expenses and other current liabilities(8.5)— (8.3)— (8.4)— 
Pension benefit obligations(63.5)(69.7)(69.6)(102.7)(74.0)(121.6)
Net amount recognized in the balance sheet$(72.0)$(17.4)$(77.9)$(56.1)$(82.4)$(82.9)
The following table details the reconciliation of amounts in the consolidated statements of stockholders’ equity for the fiscal years ended September 30, 2025, 2024 and 2023:
Fiscal Year Ended
September 30, 2025September 30, 2024September 30, 2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Reconciliation of amounts in consolidated statements of stockholders’ equity:
Prior service cost$(0.1)$(1.2)$(0.1)$(1.3)$(0.1)$(1.2)
Net loss(75.4)(235.5)(77.6)(234.9)(77.5)(207.1)
Total recognized in accumulated other comprehensive loss$(75.5)$(236.7)$(77.7)$(236.2)$(77.6)$(208.3)
The components of net periodic benefit cost other than the service cost component are included in other income in the consolidated statement of operations. The following table details the components of net periodic benefit cost for the Company’s pension plans for fiscal years ended September 30, 2025, 2024 and 2023:
Fiscal Year Ended
September 30, 2025September 30, 2024September 30, 2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Components of net periodic benefit cost:
Service costs$— $0.2 $— $0.2 $— $0.3 
Interest cost on projected benefit obligation7.9 40.1 9.7 43.7 9.8 47.7 
Expected return on plan assets(4.8)(52.2)(5.5)(57.4)(5.8)(60.8)
Amortization of prior service costs— 0.1 — 0.1 — 0.1 
Amortization of net loss (gain)3.7 (1.3)3.1 (2.3)3.5 (0.6)
Settlement loss (gain) recognized0.1 — — 0.1 (0.1)0.2 
Net periodic benefit cost (credit)$6.9 $(13.1)$7.3 $(15.6)$7.4 $(13.1)
The amount of applicable deferred income taxes included in other comprehensive income arising from a change in net prior service cost and net gain/loss was $1.1 million, $2.1 million, and $3.1 million in the years ended September 30, 2025, 2024 and 2023, respectively.
Amounts included in accumulated other comprehensive loss as of September 30, 2025 that are expected to be recognized as components of net periodic benefit cost during fiscal 2026 are (in millions):
U.S.Int’l
Amortization of prior service cost$— $(0.1)
Amortization of net actuarial (losses) gain(3.8)0.6 
Total$(3.8)$0.5 
The table below provides additional year-end information for pension plans with accumulated benefit obligations in excess of plan assets.
Fiscal Year Ended
September 30,
2025		September 30,
2024		September 30,
2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Projected benefit obligation$165.8 $395.6 $175.1 $649.8 $168.8 $628.1 
Accumulated benefit obligation$165.8 $395.6 $175.1 $649.8 $168.8 $628.1 
Fair value of plan assets$104.9 $325.9 $109.0 $547.1 $98.8 $506.5 
Funding requirements for each pension plan are determined based on the local laws of the country where such pension plan resides. In certain countries, the funding requirements are mandatory while in other countries, they are discretionary. The Company currently intends to contribute $25.0 million to the international plans in fiscal 2026. The required minimum contributions for U.S. plans are not significant. In addition, the Company may make discretionary contributions. The Company currently intends to contribute $10.8 million to U.S. plans in fiscal 2026.
The table below provides the expected future benefit payments, in millions:
Year Ending September 30, U.S.Int’l
2026$26.8 $52.2 
202718.3 51.3 
202817.6 52.9 
202916.6 54.8 
203015.7 56.0 
2031-203566.0 297.5 
Total$161.0 $564.7 
The underlying assumptions for the pension plans are as follows:
Fiscal Year Ended
September 30,
2025		September 30,
2024		September 30,
2023
U.S.Int’lU.S.Int’lU.S.Int’l
(in millions)
Weighted-average assumptions to determine benefit obligation:
Discount rate5.01 %5.83 %4.73 %5.04 %5.76 %5.65 %
Salary increase rateN/A2.81 %N/A2.91 %N/A3.06 %
Weighted-average assumptions to determine net periodic benefit cost:
Discount rate4.73 %5.04 %5.76 %5.65 %5.40 %5.27 %
Salary increase rateN/A2.91 %N/A3.06 %N/A3.48 %
Expected long-term rate of return on plan assets6.25 %5.51 %6.90 %5.74 %7.00 %6.04 %
Pension costs are determined using the assumptions as of the beginning of the plan year. The funded status is determined using the assumptions as of the end of the plan year.
The following table summarizes the Company’s target allocation for 2025 and pension plan asset allocation, both U.S. and International, as of September 30, 2025 and 2024:
Percentage of Plan Assets
as of September 30,
Target Allocations20252024
U.S.Int’lU.S.Int’lU.S.Int’l
Asset Category:
Equities18 %25 %19 %24 %24 %25 %
Debt78 65 74 64 67 64 
Cash— 3 2 2 4 2 
Diversified and other4 7 5 10 5 9 
Total100 %100 %100 %100 %100 %100 %
The Company’s domestic and foreign plans seek a competitive rate of return relative to an appropriate level of risk depending on the funded status and obligations of each plan and typically employ both active and passive investment management strategies. The Company’s risk management practices include diversification across asset classes and investment styles and periodic rebalancing toward asset allocation targets. The target asset allocation selected for each plan reflects a risk/return profile that the Company believes is appropriate relative to each plan’s liability structure and return goals.
To develop the expected long-term rate of return on assets assumption, the Company considered the historical returns and the future expectations for returns for each asset class, as well as the target asset allocation of the pension portfolio and the diversification of the portfolio. This resulted in the selection of a 6.25% and 5.51% weighted-average long-term rate of return on assets assumption for the fiscal year ended September 30, 2025 for U.S. and non-U.S. plans, respectively.
As of September 30, 2025, the fair values of the Company’s pension plan assets by major asset categories were as follows:
Fair Value Measurement as of
September 30, 2025
Total
Carrying
Value as of
September 30,
2025		Quoted
Prices in
Active
Markets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Investments
measured at
NAV
(in millions)
Cash and cash equivalents$20.5 $20.5 $— $— $— 
Debt securities361.4 361.4 — — — 
Investment funds:
Diversified and equity funds272.5 71.5 14.1 — 186.9 
Fixed income funds220.5 22.7 4.4 — 193.4 
Absolute return fund5.1 — — — 5.1 
Derivative instruments and other(3.2)9.9 (13.1)— — 
Total$876.8 $486.0 $5.4 $— $385.4 
As of September 30, 2024, the fair values of the Company’s pension plan assets by major asset categories were as follows:
Fair Value Measurement as of
September 30, 2024
Total
Carrying
Value as of
September 30,
2024		Quoted
Prices in
Active
Markets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Investments
measured at
NAV
(in millions)
Cash and cash equivalents$22.1 $22.1 $— $— $— 
Debt securities391.5 391.5 — — — 
Investment funds:
Diversified and equity funds286.7 48.5 13.5 — 224.7 
Fixed income funds213.9 17.3 4.1 — 192.5 
Absolute return fund5.9 — — — 5.9 
Derivative instruments and other(6.8)8.2 (15.0)— — 
Total$913.3 $487.6 $2.6 $— $423.1 
Cash equivalents are mostly comprised of short-term money-market instruments and are valued at cost, which approximates fair value.
For investment funds not traded on an active exchange, or if the closing price is not available, the trustee obtains indicative quotes from a pricing vendor, broker, or investment manager. These funds are categorized as Level 2 if the custodian obtains corroborated quotes from a pricing vendor or categorized as Level 3 if the custodian obtains uncorroborated quotes from a broker or investment manager.
Fixed income investment funds, not traded on an active exchange, categorized as Level 2 are valued by the trustee using pricing models that use verifiable observable market data (e.g., interest rates and yield curves observable at commonly quoted intervals), bids provided by brokers or dealers, or quoted prices of securities with similar characteristics.
Common collective investment funds are valued based on net asset value (NAV) per share or unit as a practical expedient as reported by the fund manager, multiplied by the number of shares or units held as of the measurement date. Accordingly, these NAV-based investments have been excluded from the fair value hierarchy. These collective investment funds have redemption notice periods and are redeemable at the NAV, less transaction fees. There are no significant unfunded commitments related to these investments.
Multiemployer Pension Plans
The Company participates in construction-industry multiemployer pension plans. Generally, the plans provide defined benefits to substantially all employees covered by collective bargaining agreements. Under the Employee Retirement Income Security Act, a contributor to a multiemployer plan is liable, upon termination or withdrawal from a plan, for its proportionate share of a plan’s unfunded vested liability. The Company’s aggregate contributions to these multiemployer plans were $2.7 million and $2.5 million for the years ended September 30, 2025 and 2024, respectively. At September 30, 2025 and 2024, none of the plans in which the Company participates are individually significant to its consolidated financial statements.