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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
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Reconciliation of cash, cash equivalents and restricted cash and cash equivalents at end of period: |  |
Cash and cash equivalents | $ 175 | $ 614
Restricted cash and cash equivalents included in other current assets | $ 60 | $ 4
Restricted Cash and Cash Equivalents, Current, Statement of Financial Position [Extensible Enumeration] | Other Assets, Current | Other Assets, Current
Restricted cash and cash equivalents included in restricted funds | $ 73 | $ 69
Restricted Cash and Cash Equivalents, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Restricted Cash and Investments, Noncurrent | Restricted Cash and Investments, Noncurrent
Cash, cash equivalents and restricted cash and cash equivalents at end of period | $ 308 | $ 687

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- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-4 + Details
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