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Other Financial Information
9 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Other Financial Information Other Financial Information
  
CASH FLOW DISCLOSURES — Cash income tax payments, net of refunds, were $94.5 million and $141.5 million for the nine-month periods ended September 30, 2023 and 2022, respectively. Interest paid, net of amounts capitalized, was $75.3 million and $66.2 million for the nine-month periods ended September 30, 2023 and 2022, respectively.  

CHANGES IN WORKING CAPITAL:
 Nine Months Ended
September 30,
(Millions of dollars)20232022
Accounts receivable$(63.8)$(60.3)
Inventories(16.3)11.8 
Prepaid expenses and other current assets21.0 (8.5)
Accounts payable and accrued liabilities(49.7)60.5 
Income taxes payable11.6 15.3 
Net (increase) decrease in noncash operating working capital$(97.2)$18.8