Revenue - Revenue Derived from Product Sales (Details) - Net Sales [Member] - Product Concentration Risk [Member]	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Manufacture [Member]
Disaggregation Of Revenue [Line Items]
Percentage of attributable to revenue	86.00%	86.00%	86.00%
MroProducts [Member]
Disaggregation Of Revenue [Line Items]
Percentage of attributable to revenue	13.00%	12.00%	12.00%
Service [Member]
Disaggregation Of Revenue [Line Items]
Percentage of attributable to revenue	1.00%	2.00%	2.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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