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Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 1,666 | $ 1,748
Operating Segments | U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 705 | 799
Operating Segments | International |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 963 | 950
Intersegment eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | (2) | (1)
Recorded Music | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,345 | 1,445
Recorded Music | Operating Segments | U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 532 | 627
Recorded Music | Operating Segments | International |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 813 | 818
Recorded Music | Total digital and physical | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 1,039 | 1,062
Recorded Music | Digital | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 873 | 908
Recorded Music | Physical | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 166 | 154
Recorded Music | Artist services and expanded-rights | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 196 | 204
Recorded Music | Licensing | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 110 | 179
Music Publishing | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 323 | 304
Music Publishing | Operating Segments | U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 173 | 172
Music Publishing | Operating Segments | International |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 150 | 132
Music Publishing | Digital | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 207 | 196
Music Publishing | Performance | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 56 | 51
Music Publishing | Mechanical | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 14 | 15
Music Publishing | Synchronization | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 39 | 39
Music Publishing | Other | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 7 | $ 3

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