Lines of Credit and Financing Arrangements (Senior Unsecured Notes) (Details) - Senior Unsecured Notes	1 Months Ended	6 Months Ended
	Aug. 31, 2023 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jul. 30, 2020 USD ($)	Nov. 01, 2016 debtSeries
Debt Instrument [Line Items]
Minimum principal amount accelerated	$ 75,000,000	$ 75,000,000.0
Notice period		30 days
Redemption price (percentage)	101.00%
2025 Notes [Member]
Debt Instrument [Line Items]
Senior unsecured notes				$ 300,000,000
Fixed interest rate for senior unsecured notes (as a percent)				1.35%
2027 Notes [Member]
Debt Instrument [Line Items]
Senior unsecured notes				$ 300,000,000
Fixed interest rate for senior unsecured notes (as a percent)				1.70%
2023 Notes [Member]
Debt Instrument [Line Items]
Number of senior unsecured notes | debtSeries					2
2028 Notes
Debt Instrument [Line Items]
Senior unsecured notes			$ 500,000,000
Fixed interest rate for senior unsecured notes (as a percent)			5.50%