Debt and Financing Arrangements - Schedule of Maturities of Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Debt Disclosure [Abstract]
2025	$ 536
2026	544
2027	776
2028	676
2029	707
After 2029	5,329
Long-term debt	$ 8,568	$ 8,462

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