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SUPPLEMENTAL CASH FLOW INFORMATION
6 Months Ended
Jun. 30, 2025
Supplemental Cash Flow Information [Abstract]  
SUPPLEMENTAL CASH FLOW INFORMATION SUPPLEMENTAL CASH FLOW INFORMATION
Six Months Ended June 30
(in millions)20252024
Cash paid for interest, net of amount capitalized$47.0 $47.0 
Cash paid for income taxes, net (1)
9.8 2.1 
Significant non-cash investing and financing transactions:
Accounts payable related to construction costs45.8 30.0 
Liabilities accrued for software licensing agreements4.3 — 

(1)    Cash paid for income taxes in 2025 and 2024 was net of $9.7 million related to 2024 and 2025 PTCs and $14.5 million related to 2023 and 2024 PTCs, respectively, that were sold to third parties.