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Receivables and Concentration of Credit Risk (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Apr. 04, 2021	Sep. 30, 2020
Receivables [Line Items]
Allowance for uncollectible receivables	$ 6.6	$ 6.4
Two Customers | Trade Receivables | Customer Concentration Risk
Receivables [Line Items]
Concentration risk (as a percent)	27.30%	28.40%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount of allowance for credit loss on accounts receivable.

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- Definition

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.

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