v3.26.1
Derivative Financial Instruments - Location of Gain (Loss) Recognized in Income on Derivative, Non-Designated Hedging Instruments (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items]      
Net revenue $ 7,531 $ 7,463 $ 7,562
Research and development 2,828 2,569 2,420
Other Nonoperating Income (Expense) 18 85 71
Net revenue      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (42) 18 56
Research and development      
Derivative Instruments, Gain (Loss) [Line Items]      
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 6 (11) (8)
Interest and other income (expense), net      
Derivative Instruments, Gain (Loss) [Line Items]      
Net gains (losses) on derivative instruments $ (10) $ 45 $ 12