Leases

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Leases

13. Leases

Supplemental balance sheet information related to leases was as follows:

Lease Type	Balance Sheet Classification	March 31, 2021		December 31, 2020
		(Dollars in millions)
ASSETS
Operating lease assets	Trade and other receivables, net	$	2.8	$	5.4
Operating lease assets	Prepaid expenses and other current assets		2.3		2.2
Operating lease assets	Right of use lease asset		35.4		27.9
Financing lease assets	Property, plant, and equipment, net		9.2		8.0
Total lease assets		$	49.7	$	43.5
LIABILITIES
Current
Financing lease liabilities	Current portion of long-term debt	$	1.3	$	0.4
Operating lease liabilities	Current portion of long-term lease liabilities		14.9		10.5
Noncurrent
Financing lease liabilities	Long-term debt, less current portion		9.0		8.4
Operating lease liabilities	Long-term lease liabilities, less current portion		40.8		33.6
Total lease liabilities		$	66.0	$	52.9

The components of lease expense were as follows:

	Three Months Ended March 31,
	2021			2020
Lease Cost	(Dollars in millions)
Operating lease cost	$	1.2		$	2.3
Financing lease cost:
Depreciation of lease assets		0.3			0.2
Interest on lease liabilities		0.1			0.1
Sublease income		(0.6	)		(1.0	)
Total lease cost, net	$	1.0		$	1.6