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Debt and Financing Arrangements - Net Financing Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Debt Disclosure [Abstract]
Interest expense, net of capitalized interest costs	$ 225	$ 219	$ 240
Other financing charges	27	25	26
Interest income	(6)	(9)	(23)
Net foreign exchange results for financing activities	(33)	(29)	(12)
Net financing charges	$ 213	$ 206	$ 231

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- Definition

Net financing charges includes interest expense, interest income, bank fees and amortization of debt issuance costs.

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Net foreign exchange results for financing activities.

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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).

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Amount of the cost of borrowed funds accounted for as interest expense.

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