Financial Instruments and Commodity Contracts - Summary of Notional Amount (Details) - Metal Contracts - Short - kt kt in Thousands	Jun. 30, 2024	Mar. 31, 2024
Derivative [Line Items]
Derivative, nonmonetary notional amount	1,079,000	1,061,000
Designated as Hedging Instrument | Cash flow hedges
Derivative [Line Items]
Derivative, nonmonetary notional amount	796,000	755,000
Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, nonmonetary notional amount	283,000	306,000