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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2027 | Feb. 05, 2025 | Sep. 30, 2025
Goodwill [Line Items] |  |  |
Impairments |  |  | $ 4
Finite-lived intangible assets acquired |  |  | 39
Discontinued Operations, Held-for-Sale |  |  |
Goodwill [Line Items] |  |  |
Intangible assets subject to amortization, net |  |  | 10
Tempo |  |  |
Goodwill [Line Items] |  |  |
Percentage of voting interests acquired (as a percent) |  | 50.10% |
Final purchase price |  | $ 77 |
Net assets acquired |  | 13 |
Long-term debt fair value |  | 302 |
Noncontrolling interest, fair value |  | 73 |
Tempo | Forecast |  |  |
Goodwill [Line Items] |  |  |
Percentage of voting interests acquired (as a percent) | 49.90% |  |
Final purchase price | $ 73 |  |
Tempo | Music publishing copyrights |  |  |
Goodwill [Line Items] |  |  |
Intangible assets |  | $ 351 |
Estimated useful life |  | 15 years |
Tempo | Recorded music catalog |  |  |
Goodwill [Line Items] |  |  |
Intangible assets |  | $ 88 |
Estimated useful life |  | 15 years |
Recorded Music |  |  |
Goodwill [Line Items] |  |  |
Impairments |  |  | $ 4
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Restructuring & Impairment
Impairment losses on unamortized intangible assets |  |  | $ 31

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