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Goodwill and Intangible Assets - Schedule of Changes in Goodwill for Each Reportable Segment (Detail) $ in Millions	9 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 1,920
Acquisitions	8
Other adjustments	34
Ending balance	1,962
Recorded Music
Goodwill [Roll Forward]
Beginning balance	1,456
Acquisitions	8
Other adjustments	34
Ending balance	1,498
Music Publishing
Goodwill [Roll Forward]
Beginning balance	464
Acquisitions	0
Other adjustments	0
Ending balance	$ 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

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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.

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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

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