v3.25.1
Consolidation (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Variable Interest Entity [Line Items]      
Ownership in VIE 40.00%    
Current assets:      
Cash and cash equivalents $ 1,036 $ 1,309 $ 1,498
Inventories 3,054 2,515  
Prepaid expenses and other current assets 234 152  
Total current assets 6,715 5,943  
Property, plant and equipment, net 6,851 5,741  
Goodwill 1,074 1,074 $ 1,076
Deferred income tax assets 188 143  
Total assets 16,515 14,628  
Current liabilities:      
Accrued expenses and other current liabilities 666 627  
Total current liabilities 5,114 4,835  
Accrued postretirement benefits 534 559  
Other long–term liabilities 284 305  
Total liabilities 12,000 10,818  
Variable Interest Entity, Primary Beneficiary      
Current assets:      
Cash and cash equivalents 4 4  
Accounts receivable, net 9 10  
Inventories 129 142  
Prepaid expenses and other current assets 8 8  
Total current assets 150 164  
Property, plant and equipment, net 101 104  
Goodwill 12 12  
Deferred income tax assets 36 36  
Other long–term assets 3 4  
Total assets 302 320  
Current liabilities:      
Accounts payable 134 135  
Accrued expenses and other current liabilities 37 34  
Total current liabilities 171 169  
Accrued postretirement benefits 102 121  
Other long–term liabilities 2 2  
Total liabilities $ 275 $ 292