Leases (Tables)

9 Months Ended

Sep. 30, 2020

Components of Lease Expense and Supplemental Cash Flow Information

The components of lease expense were as follows (in millions):


	Three Months Ended				Nine Months Ended
	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
Operating lease expense	$	4.8	$	3.8	$	13.5	$	11.1
Variable lease expense (1)	0.7		0.7		1.7		1.9
Short-term lease expense	1.0		0.8		2.9		2.2
Total lease expense	$	6.5	$	5.3	$	18.1	$	15.2

(1) Variable lease expense for the nine months ended September 30, 2020 and September 30, 2019 predominantly included common area maintenance charges and parking expense.

Supplemental cash flow information related to leases was as follows (in millions):


	Nine Months Ended		Nine Months Ended
	September 30, 2020		September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for operating leases	$	13.8	$	11.9

Supplemental Balance Sheet Information

Supplemental balance sheet information related to our operating leases was as follows (in millions, except lease term and discount rate):


	Classification	September 30, 2020			December 31, 2019
Operating lease ROU assets - non-current	Other assets	$	45.6		$	44.3

Operating lease liabilities - current	Accrued liabilities	$	17.2		$	15.5
Operating lease liabilities - non-current	Other liabilities	31.0			30.6
Total operating lease liabilities		$	48.2		$	46.1

Weighted average remaining lease term in years - operating leases		3.6			3.7
Weighted average discount rate - operating leases		3.2		%	2.8		%

Maturities of Operating Lease Liabilities

Maturities of operating lease liabilities as of September 30, 2020 were as follows (in millions):


Year ending December 31,	Amount
2020 (the remainder of 2020)	$	4.2
2021	17.8
2022	12.6
2023	7.2
2024	5.3
Thereafter	4.0
Total lease payments	51.1
Less imputed interest	(2.9)
Total	$	48.2