XML 57 R36.htm IDEA: XBRL DOCUMENT v3.25.1
Inventory (Tables)
3 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Inventory Balance By Type
The following table summarizes the Company’s inventory balances as of the dates indicated (in millions):
March 31, 2025December 31, 2024
Spare parts and supplies$362 $347 
Fuel and other raw materials262 246 
Total$624 $593