Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Sep. 30, 2025
Loss Contingencies [Line Items]
Standard product warranty length, minimum	1 year
Standard product warranty length, maximum	2 years
Limited product warranty length (up to)	10 years
Accrued amounts for litigation and other contingent liabilities	$ 25,881	$ 9,930
Performance Bonds
Loss Contingencies [Line Items]
Letters of credit secured using cash collateral	52,700
Outstanding performance bonds	319,600
Surety-backed letters of credit	$ 4,600