v3.26.1
Segment, Major Customer and Major Supplier Information - Selected Segment Financial Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Segment Reporting [Line Items]      
Net sales $ 5,793 $ 4,717  
Cost of goods sold (exclusive of depreciation and amortization) 4,865 4,076  
Selling, general and administrative expenses 181 175  
Adjusted EBITDA 516 416  
Depreciation and amortization 150 148  
Income tax provision 64 50  
Capital expenditures 775 386  
Equity Method Investments 954   $ 961
Assets 22,959   20,946
Net sales – third party      
Segment Reporting [Line Items]      
Net sales 5,664 4,596  
Net sales – intersegment      
Segment Reporting [Line Items]      
Net sales 620 201  
Operating Segments      
Segment Reporting [Line Items]      
Net sales 6,284 4,797  
Depreciation and amortization 157 154  
Income tax provision 16 34  
Capital expenditures 773 394  
Equity Method Investments 954   961
Assets 21,054   19,240
Operating Segments | North America      
Segment Reporting [Line Items]      
Net sales 2,761 2,022  
Cost of goods sold (exclusive of depreciation and amortization) 2,554 1,814  
Selling, general and administrative expenses 69 74  
Segment Reporting, Other Segment Item, Amount 27 1  
Adjusted EBITDA 111 133  
Depreciation and amortization 66 63  
Income tax provision (78) (3)  
Capital expenditures 730 321  
Equity Method Investments 0   0
Assets 11,235   9,859
Operating Segments | North America | Net sales – third party      
Segment Reporting [Line Items]      
Net sales 2,780 2,022  
Operating Segments | North America | Net sales – intersegment      
Segment Reporting [Line Items]      
Net sales (19) 0  
Operating Segments | Europe      
Segment Reporting [Line Items]      
Net sales 1,541 1,258  
Cost of goods sold (exclusive of depreciation and amortization) 1,364 1,144  
Selling, general and administrative expenses 48 51  
Segment Reporting, Other Segment Item, Amount 28 (7)  
Adjusted EBITDA 101 70  
Depreciation and amortization 43 44  
Income tax provision 22 8  
Capital expenditures 26 30  
Equity Method Investments 580   585
Assets 4,932   4,835
Operating Segments | Europe | Net sales – third party      
Segment Reporting [Line Items]      
Net sales 1,381 1,258  
Operating Segments | Europe | Net sales – intersegment      
Segment Reporting [Line Items]      
Net sales 160 0  
Operating Segments | Asia      
Segment Reporting [Line Items]      
Net sales 1,126 852  
Cost of goods sold (exclusive of depreciation and amortization) 949 730  
Selling, general and administrative expenses 24 28  
Segment Reporting, Other Segment Item, Amount 32 1  
Adjusted EBITDA 121 93  
Depreciation and amortization 26 25  
Income tax provision 36 7  
Capital expenditures 7 15  
Equity Method Investments 374   376
Assets 2,365   2,167
Operating Segments | Asia | Net sales – third party      
Segment Reporting [Line Items]      
Net sales 760 681  
Operating Segments | Asia | Net sales – intersegment      
Segment Reporting [Line Items]      
Net sales 366 171  
Operating Segments | South America      
Segment Reporting [Line Items]      
Net sales 856 665  
Cost of goods sold (exclusive of depreciation and amortization) 647 521  
Selling, general and administrative expenses 21 19  
Segment Reporting, Other Segment Item, Amount 2 6  
Adjusted EBITDA 186 119  
Depreciation and amortization 22 22  
Income tax provision 36 22  
Capital expenditures 10 28  
Equity Method Investments 0   0
Assets 2,522   2,379
Operating Segments | South America | Net sales – third party      
Segment Reporting [Line Items]      
Net sales 743 635  
Operating Segments | South America | Net sales – intersegment      
Segment Reporting [Line Items]      
Net sales 113 30  
Eliminations and Other      
Segment Reporting [Line Items]      
Adjusted EBITDA (3) 1  
Depreciation and amortization (7) (6)  
Income tax provision 48 16  
Capital expenditures 2 (8)  
Equity Method Investments 0   0
Assets 1,905   $ 1,706
Eliminations and Other | Net sales – third party      
Segment Reporting [Line Items]      
Net sales 129 121  
Eliminations and Other | Net sales – intersegment      
Segment Reporting [Line Items]      
Net sales $ (620) $ (201)