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v3.25.3

Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 675 | $ 430 | $ 168
Other comprehensive income | 58 | 75 | 25
Ending balance | 757 | 675 | 430
Foreign Currency Translation Gains (Losses) |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (244) | (322) | (358)
Other comprehensive income | 56 | 78 | 36
Ending balance | (188) | (244) | (322)
Minimum Pension Liability Adjustment |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (3) | (1) | (2)
Other comprehensive income | 2 | (2) | 1
Ending balance | (1) | (3) | (1)
Deferred Gains (Losses) On Derivative Financial Instruments |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | 0 | 1 | 13
Other comprehensive income | 0 | (1) | (12)
Ending balance | 0 | 0 | 1
Accumulated Other Comprehensive Loss, net |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] |  |  |
Beginning balance | (247) | (322) | (347)
Ending balance | $ (189) | $ (247) | $ (322)

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