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Interest Expense
 12 Months Ended
Dec. 31, 2025
Interest Expense, Operating and Nonoperating [Abstract]  
Interest Expense Interest Expense
Details of interest expense are as follows:
 Year ended December 31,
 202520242023
 (in millions)
Interest on borrowings(1)
$155 $150 $150 
Fees on financing agreements and other(1)
10 9 8 
Interest on tax liabilities(2)
4 (27)(2)
Interest capitalized(14)(11)(6)
Interest expense$155 $121 $150 
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(1)See Note 12—Financing Agreements for additional information.
(2)Interest on tax liabilities for the year ended December 31, 2024 primarily relates to discretionary interest relief granted from the CRA and the Alberta TRA.