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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, 2019
Dec. 31, 2018
Guarantee Obligations [Line Items]    
Balance at beginning of period $ 15.8 $ 10.4
Provision for new credit guarantees 1.5 1.3
Changes for pre-existing guarantees, net   (0.9)
Amortization of previous guarantees (1.4) (0.7)
Foreign currency translation 0.1  
Balance at end of period $ 16.0 $ 10.1