Short-Term and Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2022	Sep. 30, 2022
Debt Instrument [Line Items]
Current portion of long-term debt	$ 608.5	$ 609.1
Reported Value Measurement
Debt Instrument [Line Items]
Current portion of long-term debt	608.5	609.1
Long-term Debt	2,866.9	2,867.8
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Current portion of long-term debt	592.6	589.1
Estimate of Fair Value Measurement \| Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Long-term Debt	$ 2,503.6	$ 2,485.4

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant