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Commitments and Contingent Liabilities - Estimated Accrual Liability (Details) - National Prescription Opiate Litigation - USD ($) $ in Millions | Mar. 31, 2022 | Mar. 31, 2021
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Loss Contingencies [Line Items] |  |
Loss contingency, accrual, current | $ 1,046 | $ 0
Loss contingency, accrual, noncurrent | 7,220 | 8,067
Loss contingency accrual | $ 8,266 | $ 8,067

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