Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2023	Sep. 30, 2023
Property, Plant and Equipment [Abstract]
Accrued additions to property, plant and equipment (in accounts payable)	$ 188.4	$ 165.2

Amount of obligations incurred and payable classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

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