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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date the debt instrument was issued, in CCYY-MM-DD format.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Fair value of the amount outstanding under the credit facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

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Maximum borrowing capacity under the credit facility that the facility can be extended to subject to lenders’ consideration and without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Credit Facilities, Short-term Borrowings and Long-term Debt (Narrative) (Details)					9 Months Ended
	Jun. 19, 2019 USD ($)	Jun. 18, 2019 USD ($)	Apr. 03, 2019 USD ($)	Oct. 01, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	May 31, 2018 USD ($)	Sep. 23, 2016 EUR (€)	Oct. 01, 2013 USD ($)
Debt Instrument [Line Items]
Debt financing costs					$ 2,238,000	$ 1,325,000
Balance of unamortized debt issuance costs					2,589,000		$ 2,895,000
Short-term borrowings					180,000,000		153,635,000
The Notes [Member]
Debt Instrument [Line Items]
Balance of unamortized debt issuance costs					$ 2,589,000		2,895,000
2013 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Face amount										$ 250,000,000
Series J Notes [Member]
Debt Instrument [Line Items]
Maturity date					Nov. 15, 2020
Effective interest rate					3.77%
Series J Notes [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Effective interest rate					1.25%
Series D Notes [Member]
Debt Instrument [Line Items]
Interest rate					6.39%
Maturity date					Oct. 01, 2018
Payments of debt				$ 100,000,000
Series F Notes [Member]
Debt Instrument [Line Items]
Interest rate					8.24%
Maturity date					Apr. 03, 2019
Payments of debt			$ 43,000,000
2016 Note Purchase Agreements [Member]
Debt Instrument [Line Items]
Issuance date					Sep. 23, 2016
Face amount \| €									€ 160,000,000
Series M Notes [Member]
Debt Instrument [Line Items]
Face amount \| €									40,000,000
Interest rate					1.12%
Maturity date					Sep. 23, 2026
Series N Notes [Member]
Debt Instrument [Line Items]
Face amount \| €									77,000,000
Interest rate					1.31%
Maturity date					Sep. 23, 2028
Series O Notes [Member]
Debt Instrument [Line Items]
Face amount \| €									€ 43,000,000
Interest rate					1.57%
Maturity date					Sep. 23, 2031
2018 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Face amount								$ 400,000,000
Series P Notes [Member]
Debt Instrument [Line Items]
Face amount							85,000,000	85,000,000
Interest rate					4.27%
Maturity date					May 30, 2025
Series Q Notes [Member]
Debt Instrument [Line Items]
Face amount								85,000,000
Interest rate					4.35%
Maturity date					May 30, 2027
Series R Notes [Member]
Debt Instrument [Line Items]
Face amount								75,000,000
Interest rate					4.41%
Maturity date					May 30, 2029
Series S Notes [Member]
Debt Instrument [Line Items]
Face amount								75,000,000
Interest rate					4.46%
Maturity date					May 30, 2030
Series T Notes [Member]
Debt Instrument [Line Items]
Face amount								$ 80,000,000
Interest rate					4.61%
Maturity date					May 30, 2033
Other Foreign Short-term Borrowings [Member]
Debt Instrument [Line Items]
Short-term borrowings							3,635,000
Foreign Lines of Credit And Overdraft Facilities [Member]
Debt Instrument [Line Items]
Short-term borrowings					$ 0		$ 0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date					Jun. 19, 2024
Revolving Credit Facility [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Effective interest rate					0.875%
Revolving Credit Facility [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Effective interest rate					1.75%
Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Effective interest rate							3.48%
Balance of unamortized debt issuance costs	$ 802,000
Balance of unamortized debt issuance costs, line of credit					$ 2,990,000		$ 1,385,000
Line of Credit Facility, Expiration Date		Apr. 28, 2020
Line of Credit Facility, Maximum Borrowing Capacity							1,000,000,000
Line of Credit Facility, Maximum Borrowing Capacity Extension		$ 1,200,000,000
Outstanding borrowings							266,541,000
Short-term borrowings							$ 150,000,000
Line of Credit Facility, Minimum Consolidated Net Worth Convenant		$ 800,000,000
Amended And Restated Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Variable rate basis					LIBOR
Effective interest rate					3.54%
Debt financing costs					$ 2,238,000
Line of Credit Facility, Expiration Date	Jun. 19, 2024
Line of Credit Facility, Maximum Borrowing Capacity Extension	$ 1,500,000,000
Outstanding borrowings					361,852,000
Short-term borrowings					$ 180,000,000
Line of Credit Facility, Minimum Consolidated Net Worth Convenant	$ 1,156,000,000
Line of Credit Facility, Percentage of Positive Net Income as Part of Amended and Restated Revolving Credit Agreement	50.00%
Line Of Credit Facility, Percentage of Net Cash Proceeds as Part of Amended And Restated	50.00%
Amended And Restated Revolving Credit Agreement [Member] \| Minimum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					0.875%
Amended And Restated Revolving Credit Agreement [Member] \| Maximum [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate					1.75%
Cross Currency Interest Rate Swaps [Member] \| Series P Notes [Member]
Debt Instrument [Line Items]
Effective interest rate					1.82%
Cross Currency Interest Rate Swaps [Member] \| Series Q Notes [Member]
Debt Instrument [Line Items]
Effective interest rate					2.15%
Cross Currency Interest Rate Swaps [Member] \| Series R Notes [Member]
Debt Instrument [Line Items]
Effective interest rate					2.42%
Cross Currency Interest Rate Swaps [Member] \| Series S Notes [Member]
Debt Instrument [Line Items]
Effective interest rate					2.55%
Cross Currency Interest Rate Swaps [Member] \| Series T Notes [Member]
Debt Instrument [Line Items]
Effective interest rate					2.90%