Financial Instruments - Schedule of Loans and Other Receivables Carried at Amortized Cost (Details) - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for current expected credit losses	$ (3)	$ (20)
Loans and other receivables carried at amortized cost, net	33	18
Loans receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and other receivables carried at amortized cost	27	27
Other receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and other receivables carried at amortized cost	$ 9	$ 11

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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+ Details