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Revenue Recognition - Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 30, 2022 USD ($) source	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Refund liabilities	$ 19	$ 23
Uncollectible accounts, reserves	19	20
Deferred revenue increased related to cash received from customers	666	585
Revenue recognized related to deferred revenue	274	232
Revenue recognized from performance obligations satisfied in previous periods	$ 59	$ 64	$ 42
Recorded Music
Disaggregation of Revenue [Line Items]
Number of revenue sources | source	4
Music Publishing
Disaggregation of Revenue [Line Items]
Number of revenue sources | source	5

X

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

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- Definition

Amount of revenue recognized from performance obligation satisfied or partially satisfied in previous reporting periods. Includes, but is not limited to, change in transaction price.

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- Definition

Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer.

+ References

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Change in contract with customer liability.

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