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Loss Contingency, Number Of Plaintiffs To Decline Settlement Offer

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Loss Contingency, Patents Under Review

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- Definition

Loss Contingency, Requested Statutory Stay Period

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- Definition

Loss Contingency, Unfiled Claims, Number

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- Definition

Minimum Percentage Of Attorneys’ Eligible Clients To Release

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- Definition

Number Of Shareholder Derivative Lawsuits Filed

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- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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Number of plaintiffs that have filed claims pertaining to a loss contingency.

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Number of pending claims pertaining to a loss contingency.

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Contingencies (Details) $ in Millions	Mar. 12, 2026 plaintiff	Sep. 30, 2026 USD ($) case matter	Sep. 08, 2026	Sep. 01, 2026	Aug. 31, 2026	Aug. 04, 2026 patent	Jul. 27, 2026 patent	Jul. 23, 2026 patent	Jul. 22, 2026 patent	Feb. 18, 2026	Dec. 31, 2025 USD ($)	Jul. 28, 2025	Jul. 22, 2025 lawsuit
Loss Contingencies [Line Items]
Number of shareholder derivative lawsuits filed \| lawsuit													2
Amount of legal defense reserves \| $		$ 8									$ 10
Xiromed’s
Loss Contingencies [Line Items]
Requested statutory stay period				30 months
Northern District of Ohio
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs to decline settlement offer \| plaintiff	2
Number of plaintiffs \| plaintiff	56
Fosamax \| Federal Court
Loss Contingencies [Line Items]
Number of pending claims		498
Fosamax \| New Jersey State Court
Loss Contingencies [Line Items]
Number of pending claims		1,478
Fosamax \| Pennsylvania State Court
Loss Contingencies [Line Items]
Number of pending claims		1
Fosamax \| California State Court
Loss Contingencies [Line Items]
Number of pending claims		149
Fosamax \| California State Court \| Femur Fracture Litigation
Loss Contingencies [Line Items]
Minimum percentage of attorneys’ eligible clients to release the company and merck of any liability related to their filed claims										95.00%
Fosamax \| Femur Fracture MDL Court \| Femur Fracture Litigation
Loss Contingencies [Line Items]
Minimum percentage of attorneys’ eligible clients to release the company and merck of any liability related to their filed claims												95.00%
Implanon \| Int’l
Loss Contingencies [Line Items]
Number of pending claims		6
Implanon \| Northern District of Ohio
Loss Contingencies [Line Items]
Number of pending claims		2
Number of unfiled claims		56
Nexplanon \| CALIFORNIA
Loss Contingencies [Line Items]
Number of matters involved \| matter		1
Nexplanon \| Int’l
Loss Contingencies [Line Items]
Number of pending claims		12
Nexplanon/Implanon NXT \| Int’l
Loss Contingencies [Line Items]
Number of pending claims		18
Vtama \| Encube Ethical Private Limited
Loss Contingencies [Line Items]
Loss contingency, patents under review \| patent									12
Requested statutory stay period				30 months
Vtama \| Mylan Pharmaceuticals, Inc.
Loss Contingencies [Line Items]
Loss contingency, patents under review \| patent								9
Requested statutory stay period					30 months
Vtama \| Natco Pharma Limited
Loss Contingencies [Line Items]
Loss contingency, patents under review \| patent							9
Requested statutory stay period			30 months
Vtama \| Dr. Reddy’s Laboratories Limited
Loss Contingencies [Line Items]
Loss contingency, patents under review \| patent						12
Requested statutory stay period			30 months