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Restructuring and Impairments - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges, pretax | $ 230 |
Restructuring charges | $ 150 |
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] | Restructuring, Settlement and Impairment Provisions |
Non-cash impairments | $ 26 | $ 0
Cumulative restructuring and impairment charges | 205 |
Restructuring and impairments | 27 | $ 0
Operating Segments | Recorded Music |  |
Restructuring Cost and Reserve [Line Items] |  |
Cumulative restructuring and impairment charges | 195 |
Corporate expenses and eliminations |  |
Restructuring Cost and Reserve [Line Items] |  |
Cumulative restructuring and impairment charges | 10 |
Severance And Other Termination Costs |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges, pretax | 154 |
Restructuring charges | 129 |
Severance costs | 1 |
Severance And Other Termination Costs | Operating Segments | Recorded Music |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance costs | 2 |
Severance And Other Termination Costs | Corporate expenses and eliminations |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance costs | 1 |
Other Non-cash Charges |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 7 |
Non-cash Impairment Charges |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges, pretax | 76 |
Restructuring charges | $ 76 |

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