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Revenue Recognition - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | $ 1,010 | $ 1,058 | $ 3,337 | $ 3,351
Intersegment eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 0 | (2) | (3) | (6)
Operating Segments | U.S. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 432 | 466 | 1,433 | 1,455
Operating Segments | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 578 | 594 | 1,907 | 1,902
Recorded Music |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 861 | 913 | 2,852 | 2,887
Recorded Music | Operating Segments | U.S. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 358 | 395 | 1,191 | 1,236
Recorded Music | Operating Segments | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 503 | 518 | 1,661 | 1,651
Recorded Music | Digital |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 630 | 584 | 1,889 | 1,744
Recorded Music | Physical |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 51 | 95 | 329 | 456
Recorded Music | Total Digital and Physical |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 681 | 679 | 2,218 | 2,200
Recorded Music | Artist services and expanded-rights |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 124 | 158 | 427 | 458
Recorded Music | Licensing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 56 | 76 | 207 | 229
Music Publishing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 149 | 147 | 488 | 470
Music Publishing | Operating Segments | U.S. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 74 | 71 | 242 | 219
Music Publishing | Operating Segments | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 75 | 76 | 246 | 251
Music Publishing | Digital |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 90 | 65 | 237 | 195
Music Publishing | Performance |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 27 | 36 | 114 | 135
Music Publishing | Mechanical |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 8 | 13 | 38 | 41
Music Publishing | Synchronization |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | 22 | 29 | 92 | 89
Music Publishing | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Revenues | $ 2 | $ 4 | $ 7 | $ 10

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