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Supplemental Balance Sheet Information (Tables)
3 Months Ended
Jun. 30, 2022
Balance Sheet Related Disclosures [Abstract]  
Schedule Of Selected Supplemental Balance Sheet Information [Table Text Block]
Selected supplemental asset information is presented below.

 June 30,September 30,
 20222021
 (in millions)
Inventories:
Purchased components and raw material$154.6 $100.9 
Work in process, net57.1 41.6 
Finished goods, net39.2 42.2 
Total inventories$250.9 $184.7 
Other current assets:
Prepaid expenses$14.9 $12.8 
Non-trade receivables11.3 10.7 
Maintenance and repair supplies and tooling1.8 2.9 
Income taxes0.2 0.2 
Workers’compensation reimbursement receivable1.8 0.8 
Other current assets1.4 1.9 
Total other current assets$31.4 $29.3 
Property, plant and equipment:
Land$5.8 $6.1 
Buildings86.1 84.6 
Machinery and equipment447.8 433.3 
Construction in progress99.2 83.7 
Total property, plant and equipment638.9 607.7 
Accumulated depreciation(345.9)(324.3)
Property, plant and equipment, net$293.0 $283.4 
Other noncurrent assets:
Operating lease right-of-use assets$26.5 $27.1 
Maintenance and repair supplies and tooling21.0 19.3 
Workers’ compensation reimbursement receivable5.3 2.7 
Pension asset20.0 16.8 
Note receivable1.8 1.8 
Deferred financing fees1.1 1.3 
Other noncurrent assets3.8 4.3 
Total other noncurrent assets$79.5 $73.3 
Schedule of Accrued Liabilities
Selected supplemental liability information is presented below.

 June 30,September 30,
 20222021
 (in millions)
Other current liabilities:
Compensation and benefits$38.3 $44.6 
Customer rebates13.7 19.6 
Warranty accrual5.9 6.7 
Deferred revenue8.2 5.4 
Refund liability6.7 6.0 
Taxes other than income taxes6.1 4.4 
Operating lease liabilities4.2 4.0 
Workers’ compensation accrual3.6 2.6 
CARES Act payroll tax liabilities3.6 3.6 
Restructuring liabilities0.5 3.1 
Environmental liabilities1.2 1.2 
Interest payable0.8 6.2 
Income taxes payable4.8 8.5 
Other current liabilities5.9 11.2 
Total other current liabilities$103.5 $127.1 
Other noncurrent liabilities:
Operating lease liabilities$23.3 $24.6 
Warranty accrual4.4 3.0 
Transition tax liability4.1 4.7 
Uncertain tax position liability4.9 4.8 
NMTC liability3.9 3.9 
Workers’ compensation accrual10.4 7.9 
Asset retirement obligation 3.6 3.6 
CARES Act payroll tax liabilities— 3.6 
Deferred development grant2.5 2.5 
Other noncurrent liabilities3.5 3.4 
Total other noncurrent liabilities$60.6 $62.0 
Schedule of Goodwill
The following table summarizes information concerning our goodwill balance in the nine months ended June 30, 2022, in millions.

Balance at September 30, 2021$115.1 
Acquisition adjustments0.1 
Effects of changes in foreign currency exchange rates(6.6)
Balance at June 30, 2022$108.6