Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2025

Fair Value Disclosures [Abstract]

Schedule of Carrying Value and Fair Value of Financial Instruments

The carrying values and fair values of financial instruments were as follows:

	30 June 2025		30 September 2024
	Carrying Value	Fair Value	Carrying Value	Fair Value
Assets
Derivatives
Forward exchange contracts	$140.1	$140.1	$100.8	$100.8
Interest rate management contracts	177.3	177.3	41.8	41.8
Liabilities
Derivatives
Forward exchange contracts	$110.7	$110.7	$59.2	$59.2
Interest rate management contracts	29.4	29.4	41.4	41.4
Long-term debt, including current portion and related party	17,158.2	16,741.6	14,144.4	13,897.3

The carrying amounts reported on the consolidated balance sheets for cash and cash items, short-term investments, trade receivables, payables and accrued liabilities, accrued income taxes, and short-term borrowings approximate fair value due to the short-term nature of these instruments. Accordingly, these items have been excluded from the above table.

Schedule of Fair Value Assets and Liabilities Measured On Recurring Basis

The table below summarizes assets and liabilities on the consolidated balance sheets that are measured at fair value on a recurring basis:

	30 June 2025				30 September 2024
	Total	Level 1	Level 2	Level 3	Total	Level 1	Level 2	Level 3
Assets at Fair Value
Derivatives
Forward exchange contracts	$140.1	$—	$140.1	$—	$100.8	$—	$100.8	$—
Interest rate management contracts	177.3	—	177.3	—	41.8	—	41.8	—
Total Assets at Fair Value	$317.4	$—	$317.4	$—	$142.6	$—	$142.6	$—
Liabilities at Fair Value
Derivatives
Forward exchange contracts	$110.7	$—	$110.7	$—	$59.2	$—	$59.2	$—
Interest rate management contracts	29.4	—	29.4	—	41.4	—	41.4	—
Total Liabilities at Fair Value	$140.1	$—	$140.1	$—	$100.6	$—	$100.6	$—

Schedule of Fair Value Measurements, Nonrecurring

The following is a tabular presentation of nonrecurring fair value measurements along with the level within the fair value hierarchy in which the fair value measurement in its entirety falls:

	31 March 2025
	Total	Level 1	Level 2	Level 3	FY25 Charge
Plant and Equipment(A)	$22.5			$22.5	$1,752.0

(A) As a result of the project exits announced in the second quarter of fiscal year 2025, we assessed the recoverability of assets capable of being marketed in a secondary equipment market using an orderly liquidation valuation resulting in an impairment loss for the difference between the orderly liquidation value and net book value of the assets as of 31 March 2025. There have been no significant changes in the estimated net realizable value of the assets as of 30 June 2025. For additional information regarding our project exits, refer to Note 4, Business and Asset Actions, to the consolidated financial statements.