Merck & Co., Inc.

0000001 - Document - Cover Page

0000002 - Document - Audit Information

9952151 - Statement - Consolidated Statement of Income

9952152 - Statement - Consolidated Statement of Comprehensive Income (Loss)

9952153 - Statement - Consolidated Balance Sheet

9952154 - Statement - Consolidated Balance Sheet (Parenthetical)

9952155 - Statement - Consolidated Statement of Equity

9952156 - Statement - Consolidated Statement of Equity (Parenthetical)

9952157 - Statement - Consolidated Statement of Cash Flows

9952158 - Statement - Consolidated Statement of Cash Flows (Parenthetical)

9952159 - Disclosure - Nature of Operations

9952160 - Disclosure - Summary of Accounting Policies

9952161 - Disclosure - Acquisitions, Research Collaborations and Licensing Agreements

9952162 - Disclosure - Collaborative Arrangements

9952163 - Disclosure - Restructuring

9952164 - Disclosure - Financial Instruments

9952165 - Disclosure - Inventories

9952166 - Disclosure - Goodwill and Other Intangibles

9952167 - Disclosure - Loans Payable, Long-Term Debt and Leases

9952168 - Disclosure - Contingencies and Environmental Liabilities

9952169 - Disclosure - Equity

9952170 - Disclosure - Share-Based Compensation Plans

9952171 - Disclosure - Pension and Other Postretirement Benefit Plans

9952172 - Disclosure - Other (Income) Expense, Net

9952173 - Disclosure - Taxes on Income

9952174 - Disclosure - Earnings per Share

9952175 - Disclosure - Other Comprehensive Income (Loss)

9952176 - Disclosure - Segment Reporting

995445 - Disclosure - Insider Trading Arrangements

995447 - Disclosure - Insider Trading Policies and Procedures

995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure

9955511 - Disclosure - Summary of Accounting Policies (Policies)

9955512 - Disclosure - Acquisitions, Research Collaborations and Licensing Agreements (Tables)

9955513 - Disclosure - Collaborative Arrangements (Tables)

9955514 - Disclosure - Restructuring (Tables)

9955515 - Disclosure - Financial Instruments (Tables)

9955516 - Disclosure - Inventories (Tables)

9955517 - Disclosure - Goodwill and Other Intangibles (Tables)

9955518 - Disclosure - Loans Payable, Long-Term Debt and Leases (Tables)

9955519 - Disclosure - Equity (Tables)

9955520 - Disclosure - Share-Based Compensation Plans (Tables)

9955521 - Disclosure - Pension and Other Postretirement Benefit Plans (Tables)

9955522 - Disclosure - Other (Income) Expense, Net (Tables)

9955523 - Disclosure - Taxes on Income (Tables)

9955524 - Disclosure - Earnings per Share (Tables)

9955525 - Disclosure - Other Comprehensive Income (Loss) (Tables)

9955526 - Disclosure - Segment Reporting (Tables)

9955527 - Disclosure - Nature of Operations (Details)

9955528 - Disclosure - Summary of Accounting Policies (Details)

9955529 - Disclosure - Acquisitions, Research Collaborations and Licensing Agreements - Narrative (Details)

9955530 - Disclosure - Acquisitions, Research Collaborations and Licensing Agreements - Schedule of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details)

9955531 - Disclosure - Collaborative Arrangements - AstraZeneca PLC - Narrative (Details)

9955532 - Disclosure - Collaborative Arrangements - AstraZeneca PLC (Details)

9955533 - Disclosure - Collaborative Arrangements - Eisai Co., Ltd. - Narrative (Details)

9955534 - Disclosure - Collaborative Arrangements - Eisai Co., Ltd. (Details)

9955535 - Disclosure - Collaborative Arrangements - Bayer AG (Details)

9955536 - Disclosure - Collaborative Arrangements - Ridgeback Biotherapeutics LP (Details)

9955537 - Disclosure - Collaborative Arrangements - Daiicho Sankyo - Narrative (Details)

9955538 - Disclosure - Collaborative Arrangements - Daiicho Sankyo (Details)

9955539 - Disclosure - Collaborative Arrangements - Moderna, Inc. - Narrative (Details)

9955540 - Disclosure - Collaborative Arrangements - Moderna, Inc. (Details)

9955541 - Disclosure - Collaborative Arrangements - Bristol Meyers Squibb Company - Narrative (Details)

9955542 - Disclosure - Restructuring - Narrative (Details)

9955543 - Disclosure - Restructuring - Schedule of Charges Activities by Type of Cost (Details)

9955544 - Disclosure - Restructuring - Schedule of Activities by Program (Details)

9955545 - Disclosure - Financial Instruments - Narrative (Details)

9955546 - Disclosure - Financial Instruments - Schedule of Effect of Net Investment Hedges (Details)

9955547 - Disclosure - Financial Instruments - Schedule of Interest Rate Swaps Held (Details)

9955548 - Disclosure - Financial Instruments - Schedule of Amounts Recorded on Balance Sheet Related to Fair Value Hedges (Details)

9955549 - Disclosure - Financial Instruments - Schedule of Fair Value of Derivatives Segregated between those Derivatives that are Designated as Hedging Instruments and those that are Not Designated as Hedging Instruments (Details)

9955550 - Disclosure - Financial Instruments - Schedule of Information on Derivative Positions Subject to Master Netting Arrangements as if they were Presented on a Net Basis (Details)

9955551 - Disclosure - Financial Instruments - Schedule of Location and Pretax (Gains) or Loss Amounts for Derivatives (Details)

9955552 - Disclosure - Financial Instruments - Schedule of Income Statement Effects on Derivatives Not Designated as Hedging Instruments (Details)

9955553 - Disclosure - Financial Instruments - Schedule of Information on Debt and Equity Securities (Details)

9955554 - Disclosure - Financial Instruments - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)

9955555 - Disclosure - Financial Instruments - Schedule of Information About Changes in Liabilities for Contingent Consideration (Details)

9955556 - Disclosure - Inventories - Schedule of Inventories (Details)

9955557 - Disclosure - Inventories - Narrative (Details)

9955558 - Disclosure - Goodwill and Other Intangibles - Schedule of Goodwill Activity by Segment (Details)

9955559 - Disclosure - Goodwill and Other Intangibles - Schedule of Other Intangibles (Details)

9955560 - Disclosure - Goodwill and Other Intangibles - Narrative (Details)

9955561 - Disclosure - Loans Payable, Long-Term Debt and Leases - Narrative (Details)

9955562 - Disclosure - Loans Payable, Long-Term Debt and Leases - Schedule of Long-Term Debt (Details)

9955563 - Disclosure - Loans Payable, Long-Term Debt and Leases - Schedule of Balance Sheet Information (Details)

9955564 - Disclosure - Loans Payable, Long-Term Debt and Leases - Schedule of Maturity Schedule (Details)

9955565 - Disclosure - Contingencies and Environmental Liabilities (Details)

9955566 - Disclosure - Equity - Narrative (Details)

9955567 - Disclosure - Equity - Schedule of Shareholders' Equity (Details)

9955568 - Disclosure - Share-Based Compensation Plans - Narrative (Details)

9955569 - Disclosure - Share-Based Compensation Plans - Schedule of Assumptions Used to Determine Weighted-Average Fair Value of Options Granted (Details)

9955570 - Disclosure - Share-Based Compensation Plans - Schedule of Information Relative to Stock Option Plan Activity (Details)

9955571 - Disclosure - Share-Based Compensation Plans - Schedule of Additional Information Pertaining to Stock Option Plans (Details)

9955572 - Disclosure - Share-Based Compensation Plans - Schedule of Nonvested RSU and PSU Activity (Details)

9955573 - Disclosure - Pension and Other Postretirement Benefit Plans - Components of Net Periodic Benefit Cost (Details)

9955574 - Disclosure - Pension and Other Postretirement Benefit Plans - Obligation and Funded Status (Details)

9955575 - Disclosure - Pension and Other Postretirement Benefit Plans - Narrative (Details)

9955576 - Disclosure - Pension and Other Postretirement Benefit Plans - Accumulated and Projected Benefit Obligation in Excess of Plan Assets (Details)

9955577 - Disclosure - Pension and Other Postretirement Benefit Plans - Fair Values of Pension Plan Assets (Details)

9955578 - Disclosure - Pension and Other Postretirement Benefit Plans - Summary of Changes in Fair Value of Company's Level 3 Pension Plan Assets (Details)

9955579 - Disclosure - Pension and Other Postretirement Benefit Plans - Fair Values of Other Postretirement Benefit Plan Assets (Details)

9955580 - Disclosure - Pension and Other Postretirement Benefit Plans - Summary of Expected Benefit Payments (Details)

9955581 - Disclosure - Pension and Other Postretirement Benefit Plans - Components of Other Comprehensive Income (Details)

9955582 - Disclosure - Pension and Other Postretirement Benefit Plans - Summary of Weighted Average Assumptions Used in Determining Pension Plan and U.S. Pension and Other Postretirement Benefit Plan Information (Details)

9955583 - Disclosure - Pension and Other Postretirement Benefit Plans - Summary of Health Care Cost Trend Rate Assumptions for Other Postretirement Benefit Plans (Details)

9955584 - Disclosure - Other (Income) Expense, Net - Schedule of Other (Income) Expense, Net (Details)

9955585 - Disclosure - Other (Income) Expense, Net - Narrative (Details)

9955586 - Disclosure - Tax Income - Schedule of Reconciliation Between Effective Tax Rate and U.S. Statutory Rate (Details)

9955587 - Disclosure - Tax Income - Schedule of Reconciliation Between Effective Tax Rate and U.S. Statutory Rate (Details)

9955588 - Disclosure - Taxes on Income - Narrative (Details)

9955589 - Disclosure - Taxes on Income - Schedule of Income Before Taxes (Details)

9955590 - Disclosure - Taxes on Income - Schedule of Taxes on Income (Details)

9955591 - Disclosure - Taxes on Income - Schedule of Deferred Income Taxes (Details)

9955592 - Disclosure - Taxes on Income - Schedule of Income Taxes Paid by Jurisdiction (Details)

9955593 - Disclosure - Taxes on Income - Schedule of Unrecognized Tax Benefits (Details)

9955594 - Disclosure - Earnings Per Share - Schedule of Calculations of Earnings Per Share (Details)

9955595 - Disclosure - Earnings Per Share - Narrative (Details)

9955596 - Disclosure - Other Comprehensive Income (Loss) (Details)

9955597 - Disclosure - Segment Reporting - Narrative (Details)

9955598 - Disclosure - Segment Reporting - Schedule of Sales of Company's Products (Details)

9955599 - Disclosure - Segment Reporting - Schedule of Consolidated Revenues by Geographic Area (Details)

9955600 - Disclosure - Segment Reporting - Schedule of Reconciliation of Segment Profits to Income Before Taxes (Details)

9955601 - Disclosure - Segment Reporting - Schedule of Equity Income from Affiliates and Depreciation Included in Segment Profits (Details)

9955602 - Disclosure - Segment Reporting - Schedule of Property, Plant and Equipment, Net by Geographic Area (Details)