v3.26.1
Consolidation (Details) - USD ($)
$ in Millions
 3 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Current assets:      
Cash and cash equivalents $ 1,105 $ 1,254 $ 1,074
Inventories 5,201 4,401  
Prepaid expenses and other current assets 382 354  
Total current assets 10,479 8,993  
Property, plant and equipment, net 9,390 8,811  
Goodwill 1,079 1,079  
Deferred income tax assets 324 359  
Total assets 22,959 20,946  
Current liabilities:      
Accrued expenses and other current liabilities 737 780  
Total current liabilities 9,639 8,282  
Accrued postretirement benefits 470 485  
Other long-term liabilities 303 305  
Total liabilities 17,202 15,762  
Primary Beneficiary      
Current assets:      
Cash and cash equivalents 19 12  
Accounts receivable, net 14 9  
Inventories 129 128  
Prepaid expenses and other current assets 10 8  
Total current assets 172 157  
Property, plant and equipment, net 60 56  
Goodwill 12 12  
Deferred income tax assets 34 35  
Other long-term assets 5 4  
Total assets 283 264  
Current liabilities:      
Accounts payable 152 116  
Accrued expenses and other current liabilities 23 31  
Total current liabilities 175 147  
Accrued postretirement benefits 75 84  
Other long-term liabilities 4 3  
Total liabilities $ 254 $ 234  
Logan Aluminum Inc.      
Current liabilities:      
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage 40.00%