Restructuring (Details) $ in Millions	12 Months Ended
	Sep. 30, 2021 USD ($)
Restructuring Reserve
Balance, Beginning of Period	$ 0.0
Charge to expense	4.7
Cash payments	(4.7)
Non-cash charges	0.0
Balance, End of Period	0.0
Total expected restructuring charge	4.7
Cumulative restructuring charges incurred to date	4.7
Remaining expected restructuring charge	$ 0.0