Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Schedule of lease cost

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

	2021			2020				2019
Amortization of right-of-use assets	$	1.5		$	0.7		$	0.3
Interest on lease liabilities		0.1			0.1			—
Total finance lease cost		1.6			0.8			0.3
Operating lease cost		24.0			23.3			24.9
Short term lease cost		4.2			3.9			2.2
Variable lease cost		3.0			3.4			3.5
Sublease income		(2.0	)		(1.9	)		(1.2	)
Total lease cost	$	30.8		$	29.5		$	29.7

Schedule of supplemental balance sheet information

Supplemental balance sheet information related to leases was as follows (dollars in millions):

	December 31,
	2021		2020
Operating leases
Operating lease assets, net	$	59.9	$	67.4
Other current liabilities		17.9		21.3
Operating lease liability—long term		41.8		47.0

	December 31,
	2021			2020			2019
Weighted average remaining lease term		5.1 years			5.2 years			5.0 years
Weighted average discount rate		1.6	%		1.9	%		2.3	%

	December 31,
	2021		2020
Finance leases
Property, plant and equipment, net	$	4.6	$	3.7
Current portion of long-term debt		1.7		0.8
Long-term debt		2.6		2.6

	December 31,
	2021			2020			2019
Weighted average remaining lease term		2.9 years			3.3 years			3.7 years
Weighted average discount rate		1.6	%		2.2	%		3.0	%

Schedule of cash flow information

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

	2021		2020		2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from finance leases	$	0.1	$	0.1	$	—
Operating cash flows from operating leases		21.2		24.0		27.1
Financing cash flows from finance leases		1.6		0.9		0.4
Right-of-use assets obtained in exchange for lease liabilities
Operating leases	$	21.2	$	24.3
Finance leases		2.7		2.6

Schedule of future minimum lease payments under non-cancellable operating leases

Future lease payments under operating leases and finance leases as follows (in millions):

	Operating Leases			Finance Leases
Twelve months ending December 31:
2022	$	18.7		$	1.7
2023		13.9			1.4
2024		9.1			0.9
2025		6.9			0.3
2026		5.3			0.1
Thereafter		8.1			—
Total undiscounted lease payments		62.0			4.4
Less: imputed interest		(2.3	)		(0.1	)
Total lease liabilities	$	59.7		$	4.3