Summary of Significant Accounting Policies - Summary of Percentages on Timing of Revenue Recognition (Details) - Product Concentration Risk - Revenue from Contract with Customer Benchmark	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Goods and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	93.80%	94.40%	93.90%
Goods and services transferred over time
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	6.20%	5.60%	6.10%