Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2024

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:

	31 March 2024		30 September 2023
	Carrying Value	Fair Value	Carrying Value	Fair Value
Assets
Derivatives
Forward exchange contracts	$72.2	$72.2	$76.4	$76.4
Interest rate management contracts	193.0	193.0	317.7	317.7
Liabilities
Derivatives
Forward exchange contracts	$87.3	$87.3	$124.4	$124.4
Interest rate management contracts	65.2	65.2	87.0	87.0
Long-term debt, including current portion and related party	13,437.4	12,936.0	10,046.3	9,173.5

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:

	31 March 2024				30 September 2023
	Total	Level 1	Level 2	Level 3	Total	Level 1	Level 2	Level 3
Assets at Fair Value
Derivatives
Forward exchange contracts	$72.2	$—	$72.2	$—	$76.4	$—	$76.4	$—
Interest rate management contracts	193.0	—	193.0	—	317.7	—	317.7	—
Total Assets at Fair Value	$265.2	$—	$265.2	$—	$394.1	$—	$394.1	$—
Liabilities at Fair Value
Derivatives
Forward exchange contracts	$87.3	$—	$87.3	$—	$124.4	$—	$124.4	$—
Interest rate management contracts	65.2	—	65.2	—	87.0	—	87.0	—
Total Liabilities at Fair Value	$152.5	$—	$152.5	$—	$211.4	$—	$211.4	$—