Lease Accounting (Tables)

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Schedule of Leases Reflected on Balance Sheet

Leases are reflected in the following balance sheet accounts:

(Millions of dollars)	Classification	December 31, 2025		December 31, 2024
Assets
Operating (Right-of-use)	Operating lease right-of-use assets, net	$	526.3	$	492.9
Finance	Property, plant, and equipment, at cost, less accumulated depreciation of $69.0 in 2025 and $56.3 in 2024	100.2		103.9
Total leased assets		$	626.5	$	596.8
Liabilities
Current
Operating	Trade accounts payable and accrued liabilities	$	25.8	$	23.7
Finance	Current maturities of long-term debt	13.0		11.7
Noncurrent
Operating	Non-current operating lease liabilities	534.6		496.3
Finance	Long-term debt, including capitalized lease obligations	105.5		108.0
Total lease liabilities		$	678.9	$	639.7

Schedule of Lease Cost, Cash flow Information, Lease Term and Discount Rate

Lease Cost:		Years Ended December 31,
(Millions of dollars)	Classification	2025		2024		2023
Operating lease cost	Store and other operating expenses	$	66.7	$	59.6	$	55.1
Finance lease cost
Amortization of leased assets	Depreciation & amortization expense	14.6		14.6		15.0
Interest on lease liabilities	Interest expense	8.0		8.3		8.9
Net lease costs		$	89.3	$	82.5	$	79.0

Cash Flow Information:	Years Ended December 31,
(Millions of dollars)	2025		2024		2023
Cash paid for amounts included in the measurement of liabilities
Operating cash flows required by operating leases	$	61.0	$	53.8	$	50.6
Operating cash flows required by finance leases	$	8.0	$	8.3	$	8.9
Financing cash flows required by finance leases	$	12.4	$	11.7	$	11.4

Lease Term and Discount Rate:	Year Ended December 31,
	2025
Weighted-average remaining lease term (years)
Finance leases	10.8
Operating leases	14.6
Weighted-average discount rate
Finance leases	6.9	%
Operating leases	7.3	%

Schedule of Operating Lease Liability Maturity

Maturity of Lease Liabilities:
(Millions of dollars)	Operating leases		Finance leases
2026	$	66.6	$	20.6
2027	66.6		19.5
2028	65.6		18.5
2029	64.0		16.4
2030	62.4		14.1
After 2030	661.0		84.4
Total lease payments	986.2		173.5
Less: interest	425.8		55.0
Present value of lease liabilities	$	560.4	$	118.5

Schedule of Finance Lease Liability Maturity

Maturity of Lease Liabilities:
(Millions of dollars)	Operating leases		Finance leases
2026	$	66.6	$	20.6
2027	66.6		19.5
2028	65.6		18.5
2029	64.0		16.4
2030	62.4		14.1
After 2030	661.0		84.4
Total lease payments	986.2		173.5
Less: interest	425.8		55.0
Present value of lease liabilities	$	560.4	$	118.5