Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Components of Lease Expense

The components of lease expense were as follows:

(in millions)	Twelve Months Ended December 31		Twelve Months Ended December 31		Twelve Months Ended December 31
	2023		2022		2021
Finance lease cost:
Amortization of right-of-use assets	$	—	$	—	$	0.5
Interest on lease liabilities		—		—		—
Total finance lease cost		—		—		0.5
Operating lease cost		17.9		15.6		13.8
Short-term lease cost		8.1		7.2		3.8
Variable lease cost		—		0.3		0.3
Total lease cost	$	26.0	$	23.1	$	18.4

Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases is as follows:

(in millions)	Twelve Months Ended December 31		Twelve Months Ended December 31		Twelve Months Ended December 31
	2023		2022		2021
Cash paid for amounts included in the    measurement of lease liabilities:
Operating cash flows from operating leases	$	26.1	$	23.1	$	18.1
Operating cash flows from finance leases		—		0.1		0.5
Right-of-use assets obtained in exchange for new    lease obligations:
Operating leases	$	7.8	$	14.9	$	5.2

Supplemental Balance Sheet Information Related to Leases

Supplemental balance sheet information related to leases is as follows:

(in millions except lease term and discount rate)	December 31, 2023			December 31, 2022
Operating leases:
Operating lease right-of-use assets	$	45.1		$	45.3
Current portion of operating lease liabilities	$	13.6		$	13.9
Operating lease liabilities, net of current portion		31.6			31.4
Total operating lease liabilities	$	45.2		$	45.3
Weighted average remaining lease term:
Operating leases	6.2 years			5.5 years
Weighted average discount rate:
Operating leases		3.5	%		2.6	%

Maturities of Lease Liabilities

Maturities of lease liabilities were as follows as at December 31, 2023:

(in millions)	Operating Leases
Within one year	$	14.0
Year two		10.0
Year three		7.3
Year four		3.3
Year five		3.0
Thereafter		12.6
Total lease payments		50.2
Less imputed interest		(5.0	)
Total	$	45.2

As of December 31, 2023, additional operating and finance leases that have not yet commenced are $5.8 million.

Future lease payment for all non-cancellable operating and finance leases as of December 31, 2022 were as follows:

(in millions)	Operating Leases
Within one year	$	14.3
Year two		8.9
Year three		6.4
Year four		5.2
Year five		1.5
Thereafter		13.5
Total lease payments		49.8
Less imputed interest		(4.5	)
Total	$	45.3