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