v3.26.1
Investment in and Advances to Non-Consolidated Affiliates and Related Party Transactions - Results of Operations of Equity Method Affiliates (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Schedule of Equity Method Investments [Line Items]      
Net sales $ 18,434 $ 17,149 $ 16,210
Income tax provision 1 159 218
Net income 15 683 600
Purchase of tolling services from Alunorf 311 298 297
Equity Method Investments      
Schedule of Equity Method Investments [Line Items]      
Net sales 1,780 1,568 1,519
Cost of Revenue 1,771 1,531 1,492
Income tax provision (4) 9 4
Net income $ 13 $ 28 $ 23