Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ (68,880)	$ (3,702)	$ 1,330
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(89,048)	1,672	18,262
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	(68,880)	(3,702)	2,134
Floating-Rate Cross Currency Interest Rate Contract [Member] | Derivatives in Fair Value Hedging Relationships [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ (2,844)	$ 23	$ 4,592
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, general and administrative expenses	Selling, general and administrative expenses	Selling, general and administrative expenses
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	$ (2,854)	$ 60	$ 4,832
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, general and administrative expenses	Selling, general and administrative expenses	Selling, general and administrative expenses
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ (2,844)	$ 23	$ 5,396
Fixed-Rate Cross Currency Interest Rate Contract [Member] | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ (66,036)	$ (3,725)	$ (3,190)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, general and administrative expenses	Selling, general and administrative expenses	Selling, general and administrative expenses
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	$ (86,194)	$ 1,612	$ 13,430
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, general and administrative expenses	Selling, general and administrative expenses	Selling, general and administrative expenses
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ (66,036)	$ (3,725)	$ (3,190)
Treasury Lock | Cash Flow Hedging
Derivative Instruments Gain Loss [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative			$ (72)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest expense	Interest expense	Interest expense
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest expense	Interest expense	Interest expense
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings			$ (72)