Reclassifications out of Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Dec. 31, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Balances and Reporting Period Activities Related to Reclassifications Out of Accumulated Other Comprehensive Loss

The accumulated balances and reporting period activities for the three months ended December 31, 2024 and 2023 related to reclassifications out of accumulated other comprehensive loss are summarized as follows (in millions):

	Pension Related Adjustments		Foreign Currency Translation Adjustments		Gain/(Loss) on Derivative Instruments		Accumulated Other Comprehensive Loss
Balances at September 30, 2024	$	(252.0)	$	(646.5)	$	15.8	$	(882.7)
Other comprehensive (loss) income before reclassification	13.8		(105.5)		11.9		(79.8)
Amounts reclassified from accumulated other comprehensive income (loss)	0.5		—		(2.8)		(2.3)
Balances at December 31, 2024	$	(237.7)	$	(752.0)	$	24.9	$	(964.8)

	Pension Related Adjustments		Foreign Currency Translation Adjustments		Gain/(Loss) on Derivative Instruments		Accumulated Other Comprehensive Loss
Balances at September 30, 2023	$	(226.0)	$	(739.7)	$	39.1	$	(926.6)
Other comprehensive (loss) income before reclassification	(9.1)		60.0		(10.6)		40.3
Amounts reclassified from accumulated other comprehensive income (loss)	0.1		—		(3.6)		(3.5)
Balances at December 31, 2023	$	(235.0)	$	(679.7)	$	24.9	$	(889.8)