XML 154 R137.htm IDEA: XBRL DOCUMENT v3.21.2
Derivative Financial Instruments and Hedging Activities - Schedule of Pre-tax Effects of Derivative Instruments (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Pre-tax gains (losses) on derivative instruments      
Total pre-tax effects of derivative instruments $ (0.5) $ 2.3 $ (0.4)
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Exchange Contract | Cost of Sales      
Pre-tax gains (losses) on derivative instruments      
Reclassified from other comprehensive income (effective portion) (0.7) 0.6 1.3
Not Designated as Hedging Instruments | Foreign Exchange Contract | Miscellaneous, Net      
Pre-tax gains (losses) on derivative instruments      
Not designated as hedges $ 0.2 $ 1.7 $ (1.7)