Leases, (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Other Information Related to Operating Leases Table Text Block

	Year Ended
	December 31,
Other information related to operating leases	2023			2022			2021
	(Millions of dollars)
Weighted-average remaining lease term	4 years			5 years			6 years
Weighted-average discount rate	4.28		%	4.04		%	2.78		%
Supplemental cash flows information
Lease payments	$	(8.3)		$	(8.2)		$	(8.0)
Right-of-use assets obtained in exchange for lease obligations	$	3.9		$	0.3		$	0.4

Lessee, Operating Lease, Liability, to be Paid, Maturity

	December 31,
Future minimum lease payments under non-cancellable operating leases	2023
	(Millions of dollars)
2024	$	6.7
2025	4.9
2026	3.3
2027	3.1
2028	2.8
Thereafter	1.4
Total future minimum lease payments	$	22.2
Imputed interest	(1.9)
Total operating lease liability	$	20.3
Consolidated balance sheets as of December 31, 2023
Current operating lease liability	$	6.0
Long-term operating lease liability	14.3
Total operating lease liability	$	20.3