Leases (Tables)

6 Months Ended

Mar. 31, 2021

Leases [Abstract]

Summary of ROU assets and lease liabilities

	March 31, 2021		September 30, 2020
Right-of-use assets:
Other assets	$	10.5	$	11.9
Lease liabilities:
Other current liabilities	$	2.1	$	2.2
Other liabilities	9.7		11.0
Total liabilities	$	11.8	$	13.2

Lessee, operating lease, liability, maturity

	March 31, 2021
Remaining Fiscal 2021	$	1.4
Fiscal 2022	2.8
Fiscal 2023	2.5
Fiscal 2024	1.9
Fiscal 2025	2.0
Thereafter	2.7
Total future minimum payments	13.3
Less: Implied interest	(1.5)
Total lease liabilities	$	11.8

Lease, Cost

	Three Months Ended March 31,				Six Months Ended March 31,
	2021		2020		2021		2020
Operating lease expense	$	1.0	$	0.9	$	2.0	$	2.0
Variable lease expense	0.2		0.2		0.3		0.3