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Discontinued Operations, Goodwill, and Intangible Assets - Goodwill by segments (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2024 USD ($)
Changes in the carrying value of goodwill by reporting segment
Goodwill at the beginning of the period	$ 3,418,930
Foreign exchange impact	15,900
Acquired	12,200
Goodwill at the end of the period	3,446,984
Americas
Changes in the carrying value of goodwill by reporting segment
Goodwill at the beginning of the period	2,614,000
Foreign exchange impact	500
Acquired	12,200
Goodwill at the end of the period	2,626,700
International
Changes in the carrying value of goodwill by reporting segment
Goodwill at the beginning of the period	804,900
Foreign exchange impact	15,400
Goodwill at the end of the period	$ 820,300

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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