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Commitments and Contingent Liabilities - Schedule of Estimated Accrual Liability (Details) - National Prescription Opioid Litigation - USD ($) $ in Millions	Jun. 30, 2026	Mar. 31, 2026
Loss Contingencies [Line Items]
Current litigation liabilities	$ 602	$ 601
Long-term litigation liabilities	5,058	5,091
Total litigation liabilities	$ 5,660	$ 5,692

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