Debt and Financing Arrangements - Schedule of Net Financing Charges (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Debt Disclosure [Abstract] | ||||
| Interest expense, net of capitalized interest costs | $ 49 | $ 52 | $ 150 | $ 147 |
| Banking fees and debt issuance cost amortization | 4 | 3 | 12 | 14 |
| Interest income | (5) | (4) | (19) | (17) |
| Net foreign exchange | 0 | 0 | 1 | 0 |
| Net financing charges | $ 48 | $ 51 | $ 144 | $ 144 |
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- Definition Amount of amortization expense attributable to debt issuance costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount of gain (loss) from increase (decrease) in fair value of foreign currency derivative and nonderivative instruments designated as fair value hedge recognized in earnings and from related hedged item to extent that fair value hedge was determined to be effective. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of interest income (expense) classified as operating. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest income earned from interest bearing assets classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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