Guarantee Arrangements (Tables)

12 Months Ended

Dec. 31, 2023

Non-Contingent Portion

Guarantor Obligations [Line Items]

Schedule of Provision for Losses on Customer Guarantees

Changes in the Company’s stand ready obligations (non-contingent) to perform under guarantees were as follows (in millions):

	Year Ended December 31,						(transition period) Three Months Ended December 31,			Year Ended September 30,
	2023			2022			2021			2021
Balance at beginning of period	$	12.2		$	12.1		$	14.1		$	15.5
Adoption of ASC 326	-				—			—			(0.6	)
Provision for new credit guarantees		3.5			3.0			0.4			2.4
Changes for pre-existing guarantees, net		(0.4	)		(1.5	)		0.3			(0.5	)
Amortization of previous guarantees		(2.8	)		(1.2	)		(2.7	)		(2.8	)
Foreign currency translation		(0.1	)		(0.2	)		—			0.1
Balance at end of period	$	12.4		$	12.2		$	12.1		$	14.1

Contingent Portion

Guarantor Obligations [Line Items]

Schedule of Provision for Losses on Customer Guarantees

Changes in the Company’s off-balance sheet credit loss exposure (contingent) related to its guarantees were as follows (in millions):

	Year Ended December 31,						(transition period) Three Months Ended December 31,			Year Ended September 30,
	2023			2022			2021			2021
Balance at beginning of period	$	6.3		$	4.0		$	7.3		$	—
Adoption of ASC 326		—			—			—			7.1
Provision for new credit guarantees		1.5			1.6			0.1			2.1
Changes in allowance for pre-existing guarantees, net		(2.1	)		1.0			(3.4	)		(2.0	)
Foreign currency translation		0.1			(0.3	)		—			0.1
Balance at end of period	$	5.8		$	6.3		$	4.0		$	7.3