Revenue Recognition - Summary of Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total Revenues	$ 5,919	$ 5,301	$ 4,463
United States
Disaggregation of Revenue [Line Items]
Total Revenues	2,744	2,363	1,934
Operating Segments | United States
Disaggregation of Revenue [Line Items]
Total Revenues	2,744	2,363	1,934
Operating Segments | International
Disaggregation of Revenue [Line Items]
Total Revenues	3,180	2,942	2,533
Intersegment eliminations
Disaggregation of Revenue [Line Items]
Total Revenues	(5)	(4)	(4)
Recorded Music | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	4,966	4,544	3,810
Recorded Music | Operating Segments | United States
Disaggregation of Revenue [Line Items]
Total Revenues	2,231	1,985	1,609
Recorded Music | Operating Segments | International
Disaggregation of Revenue [Line Items]
Total Revenues	2,735	2,559	2,201
Recorded Music | Digital | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	3,305	3,105	2,568
Recorded Music | Physical | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	563	549	434
Recorded Music | Total Digital and Physical | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	3,868	3,654	3,002
Recorded Music | Artist services and expanded-rights | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	767	599	525
Recorded Music | Licensing | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	331	291	283
Music Publishing | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	958	761	657
Music Publishing | Operating Segments | United States
Disaggregation of Revenue [Line Items]
Total Revenues	513	378	325
Music Publishing | Operating Segments | International
Disaggregation of Revenue [Line Items]
Total Revenues	445	383	332
Music Publishing | Digital | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	563	436	337
Music Publishing | Performance | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	159	122	142
Music Publishing | Mechanical | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	50	49	48
Music Publishing | Synchronization | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	172	144	119
Music Publishing | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	$ 14	$ 10	$ 11