Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt consisted of the following:

	December 31,
(Millions of dollars)	2025		2024
5.625% senior notes due 2027 (net of unamortized discount of $0.5 at 2025 and $0.9 at 2024)	$	299.5	$	299.1
4.75% senior notes due 2029 (net of unamortized discount of $2.3 at 2025 and $3.0 at 2024)	497.7		497.0
3.75% senior notes due 2031 (net of unamortized discount of $3.2 at 2025 and $3.8 at 2024)	496.8		496.2
Term loan due 2028 (effective interest rate of n/a at 2025 and 6.44% at 2024)	—		385.6
Term loan due 2032 (effective interest rate of 5.61% at 2025) net of unamortized discount of $1.0 at 2025	599.0		—
Revolving credit facility, due 2030 (weighted-average interest rate of 5.88% at December 31, 2025)	183.0		56.0
Capitalized lease obligations, autos and equipment, due through 2030	7.7		3.2
Capitalized lease obligations, buildings, due through 2059	110.8		116.5
Unamortized debt issuance costs	(11.9)		(5.2)
Total long-term debt	2,182.6		1,848.4
Less current maturities	19.0		15.7
Total long-term debt, net of current	$	2,163.6	$	1,832.7