	Years Ended December 31,
	2020		2019
Operating lease cost	$	5.6	$	6.8
Finance lease cost
Amortization of leased assets	$	2.0	$	-
Interest on lease liabilities		0.6		-
Total finance lease cost	$	2.6	$	-

Short-term lease expense and variable lease cost were not material for the years ended December 31, 2020 and 2019. Rent expense was $6.1 million in 2018. As of December 31, 2020, we did not have any material leases that have not yet commenced.

The following table presents supplemental cash flow information related to our leases:

	Years Ended December 31,
	2020		2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$	5.4	$	6.8
Operating cash flows from finance leases		0.6		-
Financing cash flows from finance leases		1.8		-
ROU assets obtained in exchange for lease liabilities
Operating leases ⁽¹⁾	$	5.4	$	41.6
Finance leases		2.6		-

The following table presents the weighted average assumptions used to compute our ROU assets and lease liabilities:

	December 31, 2020			December 31, 2019
Weighted average remaining lease term (in years)
Operating leases	6.5			8.6
Finance leases		10.7			-
Weighted average discount rate
Operating leases		4.0	%		4.4	%
Finance leases		3.6	%		-

Undiscounted future minimum lease payments as of December 31, 2020, by year and in the aggregate, having non-cancelable lease terms in excess of one year are as follows:

	Operating Leases			Finance Leases
Maturity of lease liabilities
2021	$	5.5		$	2.7
2022		4.1			2.8
2023		3.0			2.7
2024		2.1			2.5
2025		1.7			2.4
Thereafter		6.0			12.5
Total lease payments		22.4			25.6
Less interest		(3.0	)		(4.8	)
Present value of lease liabilities	$	19.4		$	20.8