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Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | $ 6,426 | $ 6,037 | $ 5,919
United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 2,870 | 2,766 | 2,744
Operating Segments | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 2,870 | 2,766 | 2,744
Operating Segments | International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 3,563 | 3,277 | 3,180
Intersegment eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | (7) | (6) | (5)
Recorded Music | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 5,223 | 4,955 | 4,966
Recorded Music | Operating Segments | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 2,210 | 2,184 | 2,231
Recorded Music | Operating Segments | International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 3,013 | 2,771 | 2,735
Recorded Music | Total Digital and Physical | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 4,038 | 3,829 | 3,868
Recorded Music | Digital | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 3,519 | 3,322 | 3,305
Recorded Music | Physical | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 519 | 507 | 563
Recorded Music | Artist services and expanded-rights | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 684 | 744 | 767
Recorded Music | Licensing | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 501 | 382 | 331
Music Publishing | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 1,210 | 1,088 | 958
Music Publishing | Operating Segments | United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 660 | 582 | 513
Music Publishing | Operating Segments | International |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 550 | 506 | 445
Music Publishing | Digital | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 763 | 669 | 563
Music Publishing | Performance | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 198 | 173 | 159
Music Publishing | Mechanical | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 58 | 63 | 50
Music Publishing | Synchronization | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 175 | 167 | 172
Music Publishing | Other | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | $ 16 | $ 16 | $ 14

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