Guarantee Arrangements - Schedule of Provision for Losses on Customer Guarantees (Details1) - Indirect Guarantee of Deferred Payment and Lease Payment Agreements - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Sep. 30, 2021	Sep. 30, 2020
Non-Contingent Portion
Guarantee Obligations [Line Items]
Balance at beginning of period	$ 14.1	$ 12.1	$ 15.5	$ 15.8
Adoption of ASC 326			(0.6)
Provision for new credit guarantees	0.4	3.0	2.4	4.9
Changes for pre-existing guarantees, net	0.3	(1.5)	(0.5)	(0.5)
Amortization of previous guarantees	(2.7)	(1.2)	(2.8)	(5.0)
Foreign currency translation		(0.2)	0.1	0.3
Balance at end of period	12.1	12.2	14.1	$ 15.5
Contingent Portion
Guarantee Obligations [Line Items]
Balance at beginning of period	7.3	4.0
Adoption of ASC 326			7.1
Provision for new credit guarantees	0.1	1.6	2.1
Changes for pre-existing guarantees, net	(3.4)	1.0	(2.0)
Foreign currency translation		(0.3)	0.1
Balance at end of period	$ 4.0	$ 6.3	$ 7.3