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Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Income Tax Disclosure [Abstract] |  |  |
U.S. federal and state, Current | $ 5 | $ 7 | $ 11
U.S. federal and state, Deferred | (156) | 2 | (1)
U.S. federal and state, Total | (151) | 9 | 10
Foreign, Current | 123 | 135 | 103
Foreign, Deferred |  | (42) | 10
Foreign, Total | 123 | 93 | 113
Provision (benefit) for income taxes | $ (28) | $ 102 | $ 123

X
- Definition The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal and state tax law to the domestic taxable income (loss) from continuing operations. + References No definition available. + Details
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- Definition The component of total income tax expense for the period comprised of the net change during the period in the entity's domestic deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of the federally enacted and state tax laws. + References No definition available. + Details
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