Derivative Financial Instruments and Hedging Activities - Schedule of Pre-tax Effects of Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Sep. 30, 2021	Sep. 30, 2020
Pre-tax gains (losses) on derivative instruments
Total pre-tax effects of derivative instruments	$ 0.2	$ 2.3	$ (0.5)	$ 2.3
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Exchange Contract
Pre-tax gains (losses) on derivative instruments
Reclassified from other comprehensive income (effective portion)	$ 0.3	$ 1.4	$ (0.7)	$ 0.6
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Goods and Services Sold	Cost of Goods and Services Sold	Cost of Goods and Services Sold	Cost of Goods and Services Sold
Not Designated as Hedging Instruments | Foreign Exchange Contract | Miscellaneous, Net
Pre-tax gains (losses) on derivative instruments
Not designated as hedges	$ (0.1)	$ 0.9	$ 0.2	$ 1.7
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)