XML 58 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Polices - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Foreign Currency Transactions and Translations      
Total transaction gains (losses) related primarily to advances to and between foreign subsidiaries $ (2.2) $ 0.7 $ (0.9)
Accounts Receivable      
Allowance for doubtful accounts 0.0    
Impairment of Long-Lived Assets      
Impairment of long-lived assets $ 0.0 $ 0.0 $ 0.0
Software | Minimum      
Property, Plant and Equipment      
Property, plant and equipment, useful life 3 years    
Software | Maximum      
Property, Plant and Equipment      
Property, plant and equipment, useful life 7 years