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Segment Information - Schedule of Segment Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1,494 | $ 1,399 | $ 3,242 | $ 2,887
Adjusted OIBDA | 312 | 286 | 763 | 621
Operating Segments | Recorded Music |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 1,189 | 1,143 | 2,634 | 2,382
Adjusted OIBDA | 272 | 249 | 684 | 548
Operating Segments | Music Publishing |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 306 | 257 | 610 | 507
Adjusted OIBDA | 82 | 76 | 168 | 148
Corporate expenses and eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (1) | (1) | (2) | (2)
Adjusted OIBDA | $ (42) | $ (39) | $ (89) | $ (75)

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