v3.26.1
Consolidation (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Variable Interest Entity [Line Items]      
Ownership in VIE 40.00%    
Current assets:      
Cash and cash equivalents $ 1,254 $ 1,036 $ 1,309
Inventories 4,401 3,054  
Prepaid expenses and other current assets 354 234  
Total current assets 8,993 6,715  
Property, plant and equipment, net 8,811 6,851  
Goodwill 1,079 1,074 $ 1,074
Deferred income tax assets 359 188  
Total assets 20,946 16,515  
Current liabilities:      
Accrued expenses and other current liabilities 780 666  
Total current liabilities 8,282 5,114  
Accrued postretirement benefits 485 534  
Other long–term liabilities 305 284  
Total liabilities 15,762 12,000  
Variable Interest Entity, Primary Beneficiary      
Current assets:      
Cash and cash equivalents 12 4  
Accounts receivable, net 9 9  
Inventories 128 129  
Prepaid expenses and other current assets 8 8  
Total current assets 157 150  
Property, plant and equipment, net 56 101  
Goodwill 12 12  
Deferred income tax assets 35 36  
Other long–term assets 4 3  
Total assets 264 302  
Current liabilities:      
Accounts payable 116 134  
Accrued expenses and other current liabilities 31 37  
Total current liabilities 147 171  
Accrued postretirement benefits 84 102  
Other long–term liabilities 3 2  
Total liabilities $ 234 $ 275