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Fair Value Measurements (Tables) | 6 Months Ended
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Mar. 31, 2025
Fair Value Disclosures [Abstract] |
Schedule of Fair Value of Financial Instruments | The following tables show the fair value of the Company’s financial instruments that are required to be measured at fair value as of March 31, 2025 and September 30, 2024.
| Fair Value Measurements as of March 31, 2025
| (Level 1) |  | (Level 2) |  | (Level 3) |  | Total
| (in millions)
Other Current Assets: |  |  |  |  |  |  |
Foreign currency forward exchange contracts (a) | $ | — |  |  | $ | 4 |  |  | $ | — |  |  | $ | 4 |
Other current liabilities: |  |  |  |  |  |  |
Foreign currency forward exchange contracts (a) | $ | — |  |  | $ | (1) |  |  | $ | — |  |  | $ | (1) |
Other noncurrent assets: |  |  |  |  |  |  |
Equity investments with readily determinable fair value (b) | 8 |  |  | — |  |  | — |  |  | 8 |
| Fair Value Measurements as of September 30, 2024
| (Level 1) |  | (Level 2) |  | (Level 3) |  | Total
| (in millions)
Other noncurrent assets: |  |  |  |  |  |  |
Equity investment with readily determinable fair value (b) | 9 |  |  | — |  |  | — |  |  | 9 |
______________________________________ (a)The fair value of foreign currency forward exchange contracts is based on dealer quotes of market forward rates and reflects the amount that the Company would receive or pay at their maturity dates for contracts involving the same currencies and maturity dates. (b)These represent equity investments with a readily determinable fair value. The Company has measured its investments to fair value in accordance with ASC 321, Investments—Equity Securities, based on quoted prices in active markets.

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- Definition Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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