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PENSION PLANS AND OTHER BENEFITS (Tables)
 12 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Schedule of Pension Obligations and Plan Assets and Benefit Obligations
The following table sets forth pension obligations and plan assets for the Company’s UK pension plan (in millions):
 September 30,
2025		September 30,
2024
Change in benefit obligation:
Benefit obligation at beginning of period$45.0 $39.7 
Interest cost2.1 2.2 
Actuarial (gain) loss(1.9)2.0 
Benefits paid(3.2)(2.9)
Currency fluctuation adjustment— 4.0 
Benefit obligation at end of period42.0 45.0 
Change in plan assets:  
Fair value at beginning of period47.2 41.5 
Actual return(0.7)4.3 
Company contributions— — 
Currency fluctuation adjustment(0.1)4.3 
Benefits paid(3.2)(2.9)
Fair value of plan assets at end of period43.2 47.2 
Overfunded status of the plan$1.2 $2.2 
The following table sets forth the Company’s benefit obligation (in millions):
 September 30,
2025		September 30,
2024
Change in benefit obligation:
Benefit obligation at beginning of period$9.4 $8.8 
Service cost0.2 0.2 
Interest cost0.4 0.5 
Benefits paid(0.3)(0.4)
Plan amendment
(0.6)— 
Actuarial loss (gain)
(0.9)0.3 
Currency fluctuation adjustment(0.2)— 
Benefit obligation at end of period$8.0 $9.4 
Schedule of Components of Net Periodic Pension Cost (Benefit) The components of net periodic pension cost (benefit) were as follows (in millions):
Fiscal Year Ended
 September 30,
2025		September 30,
2024		September 30,
2023
Interest cost on projected benefit obligation$2.1 $2.2 $2.1 
Prior service cost(0.1)(0.1)(0.1)
Expected return on plan assets(2.2)(2.2)(2.3)
Net amortization1.1 1.4 0.3 
Net periodic pension cost$0.9 $1.3 $— 
Schedule of Changes in Other Comprehensive Loss (Income)
The following table summarizes changes in other comprehensive loss (income) (in millions):
 September 30,
2025		September 30,
2024
Net loss (gain) arising during the period
$1.0 $(0.1)
Amortization of net loss
(1.1)(1.4)
Amortization of prior service credit
0.1 0.1 
Allocated tax expense
0.2 0.4 
Currency fluctuation adjustment(0.1)$(0.7)
Total recognized in other comprehensive loss (income)
$0.1 $(1.7)
Net periodic benefit cost
0.9 1.3 
Total recognized in net periodic benefit cost and other comprehensive loss (income)
$1.0 $(0.4)
Schedule of Accumulated Other Comprehensive Loss
Amounts recognized in accumulated other comprehensive loss, net of tax, consisted of the following (in millions):
Fiscal Year Ended
 September 30,
2025		September 30,
2024
Net actuarial loss (gain)
$1.0 $(0.1)


Amounts in accumulated other comprehensive loss expected to be recognized in components of net periodic pension cost during the fiscal year ended September 30, 2026 (in millions):
 September 30,
2025
Net actuarial loss
$(1.2)
Prior service credit
$0.1 
The components of and changes in AOCL are as follows (in millions):
Fiscal Year Ended September 30, 2025(a)
(Losses) and Gains on Cash Flow HedgesDefined Benefit PensionOther Post-Employment BenefitsForeign CurrencyTotal
Beginning balance$(1.3)$(6.2)$1.4 $(90.3)$(96.4)
Other comprehensive (loss) income before reclassifications
(2.0)(1.0)1.5 (12.3)(13.8)
Amounts reclassified from AOCL(b)(c)
2.5 0.9 (1.1)— 2.3 
Net current period other comprehensive income (loss)
0.5 (0.1)0.4 (12.3)(11.5)
Ending balance$(0.8)$(6.3)$1.8 $(102.6)$(107.9)
Fiscal Year Ended September 30, 2024(a)
(Losses) and Gains on Cash Flow HedgesDefined Benefit PensionOther Post-Employment BenefitsForeign CurrencyTotal
Beginning balance$(1.4)$(6.6)$1.7 $(98.4)$(104.7)
Other comprehensive (loss) income before reclassifications
(4.6)(0.6)(0.2)8.1 2.7 
Amounts reclassified from AOCL(b)(c)
4.7 1.0 (0.1)— 5.6 
Net current period other comprehensive income (loss)
0.1 0.4 (0.3)8.1 8.3 
Ending balance$(1.3)$(6.2)$1.4 $(90.3)$(96.4)
(a)With the exception of the CTA, for which no tax effect is recorded, the changes in the components of AOCL presented in the table are reflected net of applicable income taxes.
(b)The amounts reclassified from AOCL are recorded to product costs for losses and gains on cash flow hedges. The amounts reclassified from AOCL are recorded to other (income) expense related to defined benefit pension and other post-employment benefits.
(c)The Company recorded foreign exchange loss of $2.0 million and $0.2 million in the fiscal years ended September 30, 2025 and September 30, 2024, respectively, in AOCL related to intercompany notes which were deemed to be of a long-term investment nature.
Schedule of Assumptions Used in Determining Pension Information
The assumption used to determine benefit obligations for the UK pension plan was as follows:
Fiscal Year Ended
 September 30,
2025		September 30,
2024		September 30,
2023
Discount rate5.60 %4.90 %5.55 %
 
The assumptions used to determine net periodic benefit costs for the UK pension plan were as follows:
Fiscal Year Ended
 September 30,
2025		September 30,
2024		September 30,
2023
Discount rate4.90 %5.55 %5.45 %
Expected return on plan assets5.00 %5.40 %5.05 %
Schedule of Weighted-Average Asset Allocations The weighted-average asset allocations by asset category are as follows:
Asset CategorySeptember 30,
2025		September 30,
2024
Cash and cash equivalents6 %2 %
Blended funds27 %43 %
Bond funds67 %55 %
Total100 %100 %
Schedule of Fair Value of Pension Plan Assets
The fair value of the Company’s UK pension plan assets by asset category (see Note 15. Fair Value Measurements for a discussion regarding fair value measurements) are as follows (in millions):
 September 30,
2025		Level OneLevel TwoLevel Three
Asset category:
Cash and cash equivalents(a)
$2.7 $2.7 $— $— 
Blended funds(b)
11.7 — 11.7 — 
Bond funds:(c)
    
Treasuries28.8 — 28.8 — 
Total Pension Assets$43.2 $2.7 $40.5 $— 

 September 30,
2024		Level OneLevel TwoLevel Three
Asset category:
Cash and cash equivalents(a)
$1.0 $1.0 $— $— 
Blended funds(b)
20.2 — 20.2 — 
Bond funds:(c)
    
Treasuries26.0 — 26.0 — 
Total Pension Assets$47.2 $1.0 $46.2 $— 
(a)The fair value of cash and cash equivalents is its carrying value.
(b)The Company is invested in a diversified growth fund. The diversified growth fund is valued at the last traded or official close for the underlying equities and bid or mid for the underlying fixed income securities depending on the portfolio benchmark. Where representative prices are unavailable, underlying fixed income investments are valued based on other observable market-based inputs.
(c)This category includes investments in investment-grade fixed-income instruments and funds linked to UK treasury notes. The funds are valued using the bid amounts for each fund. The Company’s bond fund pension assets are primarily invested in UK-linked treasuries.
Schedule of Future Expected Benefit Payments
The Company expects to pay the following benefit payments (in millions):
Years Ending September 30:Future Expected Benefit Payments
2026$3.2 
20273.2 
20283.3 
20293.4 
20303.4 
2031-203518.5 
The Company expects to pay the following payments for the Canadian Benefits (in millions):
Years Ending September 30:Future Expected Benefit Payments
2026$0.4 
20270.4 
20280.5 
20290.5 
20300.5 
2031-20352.8