Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases

Schedule of lease costs

		Year ended
		December 31,
	Classification		2021	2020
		(in millions)
Finance lease cost
Amortization of leased asset	Depreciation	$	10.1	$	7.6
Interest on lease liabilities	Interest expense		1.1		1.2
Operating lease cost(1)	Operating expense		8.0		8.0
Sublease income	Other income		(0.5)		—
Net lease cost		$	18.7	$	16.8

(1)  Includes short-term lease and variable costs of $1.2 and $1.1 million for the years ended December 31, 2021 and 2020, respectively.

Schedule of lease maturities, Finance Leases,

The following table presents aggregate lease maturities as of December 31, 2021:

	Finance Leases		Operating Leases		Total
	(in millions)
2022	$	10.9	$	6.0	$	16.9
2023		7.7		5.0		12.7
2024		3.8		4.0		7.8
2025		0.7		2.7		3.4
2026		0.3		1.8		2.1
Thereafter		—		2.1		2.1
Total lease payments		23.4		21.6		45.0
Less: interest		1.1		2.7		3.8
Present value of lease liabilities	$	22.3	$	18.9	$	41.2

The following table presents aggregate lease maturities as of December 31, 2020:

	Finance Leases		Operating Leases		Total
	(in millions)
2021	$	15.5	$	7.1	$	22.6
2022		11.8		6.4		18.2
2023		5.8		4.9		10.7
2024		1.3		3.9		5.2
2025		0.4		2.6		3.0
Thereafter		—		3.9		3.9
Total lease payments		34.8		28.8		63.6
Less: interest		1.9		4.0		5.9
Total lease payments	$	32.9	$	24.8	$	57.7

Schedule of lease maturities, Operating Leases

The following table presents aggregate lease maturities as of December 31, 2021:

	Finance Leases		Operating Leases		Total
	(in millions)
2022	$	10.9	$	6.0	$	16.9
2023		7.7		5.0		12.7
2024		3.8		4.0		7.8
2025		0.7		2.7		3.4
2026		0.3		1.8		2.1
Thereafter		—		2.1		2.1
Total lease payments		23.4		21.6		45.0
Less: interest		1.1		2.7		3.8
Present value of lease liabilities	$	22.3	$	18.9	$	41.2

The following table presents aggregate lease maturities as of December 31, 2020:

	Finance Leases		Operating Leases		Total
	(in millions)
2021	$	15.5	$	7.1	$	22.6
2022		11.8		6.4		18.2
2023		5.8		4.9		10.7
2024		1.3		3.9		5.2
2025		0.4		2.6		3.0
Thereafter		—		3.9		3.9
Total lease payments		34.8		28.8		63.6
Less: interest		1.9		4.0		5.9
Total lease payments	$	32.9	$	24.8	$	57.7

Schedule of weighted average remaining lease term and discount rate

	Year ended December 31,
	2021		2020
Weighted-average remaining lease term (in years)
Finance Leases	2.5		2.6
Operating Leases	4.5		5.0
Weighted-average discount rate
Finance Leases	4.02	%	4.49	%
Operating Leases	5.75	%	5.96	%

Schedule of other information related to operating and finance leases

	Year ended December 31,
	2021		2020
	(in millions)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	6.4	$	6.6
Operating cash flows from finance leases		1.1		1.2
Financing cash flows from finance leases		22.2		10.7
Right-of-use assets obtained in exchange for lease obligations:
Finance leases		11.5		20.5
Operating leases		1.0		5.8