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Supplemental Balance Sheet Information (Tables)
3 Months Ended
Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]  
Schedule Of Selected Supplemental Balance Sheet Information [Table Text Block] Selected supplemental asset information is presented below.
 December 31,September 30,
 20212021
 (in millions)
Inventories:
Purchased components and raw material$125.9 $100.9 
Work in process41.5 41.6 
Finished goods42.3 42.2 
Total inventories$209.7 $184.7 
Other current assets:
Prepaid expenses$13.8 $12.8 
Non-trade receivables10.0 10.7 
Maintenance and repair supplies and tooling2.7 2.9 
Income taxes0.2 0.2 
Workers’compensation reimbursement receivable0.8 0.8 
Other current assets3.1 1.9 
Total other current assets$30.6 $29.3 
Property, plant and equipment:
Land$5.5 $6.1 
Buildings84.4 84.6 
Machinery and equipment436.2 433.3 
Construction in progress91.5 83.7 
Total property, plant and equipment617.6 607.7 
Accumulated depreciation(330.7)(324.3)
Property, plant and equipment, net$286.9 $283.4 
Other noncurrent assets:
Operating lease right-of-use assets$26.4 $27.1 
Maintenance and repair supplies and tooling19.8 19.3 
Workers’ compensation reimbursement receivable2.7 2.7 
Pension asset17.9 16.8 
Note receivable1.8 1.8 
Deferred financing fees1.2 1.3 
Other noncurrent assets4.2 4.3 
Total other noncurrent assets$74.0 $73.3 
Schedule of Accrued Liabilities Selected supplemental liability information is presented below.
 December 31,September 30,
 20212021
 (in millions)
Other current liabilities:
Compensation and benefits$28.4 $44.6 
Customer rebates27.4 19.6 
Warranty accrual5.6 6.7 
Deferred revenues7.4 5.4 
Refund liability5.2 6.0 
Taxes other than income taxes4.6 4.4 
Operating lease liabilities3.6 4.0 
Workers’ compensation accrual2.7 2.6 
CARES Act payroll tax liabilities3.6 3.6 
Restructuring liabilities3.1 3.1 
Environmental liabilities— 1.2 
Interest payable0.8 6.2 
Income taxes payable10.8 8.5 
Other current liabilities11.2 11.2 
Total other current liabilities$114.4 $127.1 
Other noncurrent liabilities:
Operating lease liabilities$23.8 $24.6 
Warranty accrual3.1 3.0 
Transition tax liability4.7 4.7 
Uncertain tax position liability4.6 4.8 
NMTC liability3.9 3.9 
Workers’ compensation accrual8.1 7.9 
Asset retirement obligation 3.6 3.6 
CARES Act payroll tax liabilities— 3.6 
Deferred development grant2.5 2.5 
Other noncurrent liabilities2.8 3.4 
Total other noncurrent liabilities$57.1 $62.0 
Schedule of Goodwill The following table summarizes information concerning our goodwill balance in the three months ended December 31, 2021, in millions.
Balance at September 30, 2021$115.1 
Acquisition purchase price adjustment(0.2)
Effects of changes in foreign currency exchange rates2.8 
Balance at December 31, 2021$117.7