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Segment Information - Schedule of Components of Adjusted OIBDA to Operating Income (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting [Abstract] |  |
Operating income | $ 214 | $ 354
Amortization expense | 57 | 55
Depreciation expense | 29 | 26
Restructuring and impairments | 27 | 0
Transformation initiative costs | 17 | 19
Net gain on divestitures | 0 | (17)
Non-cash stock-based compensation and other related costs | 19 | 14
Adjusted OIBDA | $ 363 | $ 451

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