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Commitments, Contingent Liabilities and Litigation (Details) $ in Millions |  | 3 Months Ended
--- | --- | ---
Apr. 30, 2018 organization jurisdictions plaintiff lawsuit | Mar. 31, 2018 USD ($)
Loss Contingencies [Line Items] |  |
Loss Contingency, Request for Information |  | 39
Loss contingency accrual, net of insurance recoveries | $ |  | $ 247.0
Subsequent Event |  |
Loss Contingencies [Line Items] |  |
Number of plaintiffs | plaintiff | 1,607 |
Product Liability Lawsuits | Subsequent Event |  |
Loss Contingencies [Line Items] |  |
Number of lawsuits filed | 16 |
Number of plaintiffs | organization | 17 |
CVS Health |  |
Loss Contingencies [Line Items] |  |
Maximum quarterly payment | $ |  | $ 45.6
Opioid Lawsuits | Subsequent Event |  |
Loss Contingencies [Line Items] |  |
Loss Contingencies, Number of Jurisdictions in Lawsuits | jurisdictions | 46 |
loss contingency, class action lawsuits | 21 |
Product Liability Lawsuits | Subsequent Event |  |
Loss Contingencies [Line Items] |  |
Number of lawsuits filed | 137 |

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