Derivative Financial Instruments Derivative Financial Instruments (Gross Fair Value) (Details) - USD ($) $ in Thousands	Mar. 28, 2020	Sep. 30, 2019
Derivative [Line Items]
Gross Amount of Recognized Assets	$ 2,708
Gross Amount of Recognized Liabilities	4,074
Not Designated as Hedging Instrument \| Forward Contracts
Derivative [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	2,708	$ 1,390
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	2,233	2,771
Designated as Hedging Instrument \| Forward Contracts
Derivative [Line Items]
Gross Amount of Recognized Assets	0	1,674
Gross Amount of Recognized Liabilities	1,841	0
Other Current Assets \| Forward Contracts
Derivative [Line Items]
Gross Amount of Recognized Assets	2,700	3,100
Other Current Liabilities \| Forward Contracts
Derivative [Line Items]
Gross Amount of Recognized Liabilities	$ 4,100	$ 2,800

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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-Publisher FASB
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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

+ References

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- Definition

Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments.

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