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Discontinued Operations, Goodwill and Intangible Assets - Schedule of Changes in Carrying Value of Goodwill by Reportable Segment (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2025 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 3,480,155
Foreign Exchange Impact	(36,100)
Acquired	0
Goodwill, ending balance	3,444,057
Americas
Goodwill [Roll Forward]
Goodwill, beginning balance	2,625,700
Foreign Exchange Impact	(9,700)
Acquired	0
Goodwill, ending balance	2,616,000
International
Goodwill [Roll Forward]
Goodwill, beginning balance	854,500
Foreign Exchange Impact	(26,400)
Acquired	0
Goodwill, ending balance	$ 828,100

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- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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