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Other Financial Information
 12 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Other Financial Information Other Financial Information
 
CASH FLOW DISCLOSURES — Interest paid, net of amounts capitalized, was $105.1 million, $93.1 million and $92.3 million for the years ended December 31, 2025, 2024 and 2023, respectively.

CHANGES IN WORKING CAPITAL:
Years ended December 31,
(Millions of dollars)202520242023
Accounts receivable$(8.1)$65.4 $(56.3)
Inventories(11.4)(60.2)(22.1)
Prepaid expenses and other current assets3.6 (3.1)25.2 
Accounts payable and accrued liabilities(4.3)(3.9)(12.0)
Income taxes payable(12.9)34.6 23.1 
Net (increase) decrease in noncash operating
working capital		$(33.1)$32.8 $(42.1)