Severance and Retention Costs related to our Restructured European Operations (Details) - Severance and Retention Related to Updated European Distribution Model [Member] $ in Millions	3 Months Ended
	Dec. 31, 2020 USD ($)
Severance and Retention Costs related to our Restructured European Operations [Abstract]
Beginning balance	$ 0.0
Severance and retention expense	12.5
Amounts paid during the period	(0.1)
Accrued Compensation [Member]
Severance and Retention Costs related to our Restructured European Operations [Abstract]
Ending balance	12.4
R&D Expenses [Member]
Severance and Retention Costs related to our Restructured European Operations [Abstract]
Severance and retention expense	4.2
SG&A Expenses [Member]
Severance and Retention Costs related to our Restructured European Operations [Abstract]
Severance and retention expense	8.3
Maximum [Member]
Severance and Retention Costs related to our Restructured European Operations [Abstract]
Expected expenses	$ 14.8