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
	Dec. 31, 2021	Dec. 31, 2020
Non-Contingent Portion
Guarantee Obligations [Line Items]
Balance at beginning of period	$ 14.1	$ 15.5
Adoption of ASC 326		(5.2)
Provision for new credit guarantees	0.4	0.4
Changes for pre-existing guarantees, net	0.3	0.2
Amortization of previous guarantees	(2.7)	(1.0)
Foreign currency translation		0.2
Balance at end of period	12.1	10.1
Contingent Portion
Guarantee Obligations [Line Items]
Balance at beginning of period	7.3
Adoption of ASC 326		7.1
Provision for new credit guarantees	0.1	0.5
Changes for pre-existing guarantees, net	(3.4)	(0.8)
Foreign currency translation		0.1
Balance at end of period	$ 4.0	$ 6.9