Commitments and Contingent Liabilities - Schedule of Estimated Accrual Liability (Details) - National Prescription Opioid Litigation - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025
Loss Contingencies [Line Items]
Current litigation liabilities	$ 617	$ 776
Long-term litigation liabilities	5,103	5,601
Total litigation liabilities	$ 5,720	$ 6,377

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details