v3.25.1
Financial Instruments and Commodity Contracts (Gain (Loss) Recognition) (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other expenses (income), net Other expenses (income), net Other expenses (income), net
Losses recognized on balance sheet remeasurement currency exchange contracts, net $ 30 $ 7 $ 54
Realized losses (gains), net 97 (80) 83
Unrealized (gains) losses on other derivative instruments, net (57) 36 (23)
Total loss (gain) recognized in other expenses (income), net 70 (37) 114
Derivatives not designated as hedging instruments:      
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss (gain) recognized in other expenses (income), net 73 (36) 118
Derivatives not designated as hedging instruments: | Metal contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss (gain) recognized in other expenses (income), net 40 (42) 63
Derivatives not designated as hedging instruments: | Currency exchange contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss (gain) recognized in other expenses (income), net 30 8 58
Derivatives not designated as hedging instruments: | Energy contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss (gain) recognized in other expenses (income), net 3 (2) (3)
Derivatives designated as hedging instruments:      
Derivative Instruments, Gain (Loss) [Line Items]      
Total loss (gain) recognized in other expenses (income), net $ (3) $ (1) $ (4)