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Goodwill and Intangible Assets - Schedule of Changes in Goodwill for Each Reportable Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Goodwill [Roll Forward]
Beginning balance	$ 1,920	$ 1,830
Acquisitions	51	160
Other adjustments	22	(70)
Ending balance	1,993	1,920
Recorded Music
Goodwill [Roll Forward]
Beginning balance	1,456	1,366
Acquisitions	51	160
Other adjustments	22	(70)
Ending balance	1,529	1,456
Music Publishing
Goodwill [Roll Forward]
Beginning balance	464	464
Acquisitions	0	0
Other adjustments	0	0
Ending balance	$ 464	$ 464

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.

+ References

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X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
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- Definition

Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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