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SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (PARENT COMPANY) - Narrative (Details) - Parent Company $ in Millions | 12 Months Ended
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Sep. 30, 2025 USD ($)
Guarantee Obligations [Line Items] |
Surety bonds indemnified | $ 110
Maximum amount authorized to guarantee obligations to suppliers and customers (up to) | 375
Current carrying value | $ 283

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