10-Q Filing

MERCK & CO., INC. CIK: 310158 Q3 2025

Filing Information

Form Type	10-Q
Accession Number	`0000310158-25-000059`
Period End Date	20250930
Filing Date	20251105
Fiscal Year	2025
Fiscal Period	Q3
XBRL Instance	mrk-20250930_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 160 Income Statement 112 Cash Flow Statement 148 Comprehensive Income 48

Balance Sheet 160 line items

Line Item	Tag	Value	Unit	Period
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$89.00M	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$89.00M	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$93.00M	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$93.00M	USD	Point-in-time
Inventories classified in other assets	`InventoryNoncurrent`	$4.19B	USD	Point-in-time
Inventories classified in other assets	`InventoryNoncurrent`	$4.19B	USD	Point-in-time
Inventories classified in other assets	`InventoryNoncurrent`	$5.41B	USD	Point-in-time
Inventories classified in other assets	`InventoryNoncurrent`	$5.41B	USD	Point-in-time
Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$19.16B	USD	Point-in-time
Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$19.16B	USD	Point-in-time
Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$20.61B	USD	Point-in-time
Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$20.61B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$13.24B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$13.24B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$18.17B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$18.17B	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.50	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.50	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.50	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.50	USD	Point-in-time
Short-term investments	`MarketableSecuritiesCurrent`	$447.00M	USD	Point-in-time
Short-term investments	`MarketableSecuritiesCurrent`	$447.00M	USD	Point-in-time
Short-term investments	`MarketableSecuritiesCurrent`	$45.00M	USD	Point-in-time
Short-term investments	`MarketableSecuritiesCurrent`	$45.00M	USD	Point-in-time
Accounts receivable (net of allowance for doubtful accounts of $93 in 2025 and $89 in 2024)	`AccountsReceivableNetCurrent`	$10.28B	USD	Point-in-time
Accounts receivable (net of allowance for doubtful accounts of $93 in 2025 and $89 in 2024)	`AccountsReceivableNetCurrent`	$10.28B	USD	Point-in-time
Accounts receivable (net of allowance for doubtful accounts of $93 in 2025 and $89 in 2024)	`AccountsReceivableNetCurrent`	$12.12B	USD	Point-in-time
Accounts receivable (net of allowance for doubtful accounts of $93 in 2025 and $89 in 2024)	`AccountsReceivableNetCurrent`	$12.12B	USD	Point-in-time
Common stock, authorized (in shares)	`CommonStockSharesAuthorized`	6.50B	shares	Point-in-time
Common stock, authorized (in shares)	`CommonStockSharesAuthorized`	6.50B	shares	Point-in-time
Common stock, authorized (in shares)	`CommonStockSharesAuthorized`	6.50B	shares	Point-in-time
Common stock, authorized (in shares)	`CommonStockSharesAuthorized`	6.50B	shares	Point-in-time
Common stock, issued (in shares)	`CommonStockSharesIssued`	3.58B	shares	Point-in-time
Common stock, issued (in shares)	`CommonStockSharesIssued`	3.58B	shares	Point-in-time
Common stock, issued (in shares)	`CommonStockSharesIssued`	3.58B	shares	Point-in-time
Common stock, issued (in shares)	`CommonStockSharesIssued`	3.58B	shares	Point-in-time
Inventories (excludes inventories of $5,412 in 2025 and $4,193 in 2024 classified in Other assets - see Note 6)	`InventoryNet`	$6.11B	USD	Point-in-time
Inventories (excludes inventories of $5,412 in 2025 and $4,193 in 2024 classified in Other assets - see Note 6)	`InventoryNet`	$6.11B	USD	Point-in-time
Inventories (excludes inventories of $5,412 in 2025 and $4,193 in 2024 classified in Other assets - see Note 6)	`InventoryNet`	$6.44B	USD	Point-in-time
Inventories (excludes inventories of $5,412 in 2025 and $4,193 in 2024 classified in Other assets - see Note 6)	`InventoryNet`	$6.44B	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$8.71B	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$8.71B	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$10.78B	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$10.78B	USD	Point-in-time
Treasury stock (in shares)	`TreasuryStockCommonShares`	1.05B	shares	Point-in-time
Treasury stock (in shares)	`TreasuryStockCommonShares`	1.05B	shares	Point-in-time
Treasury stock (in shares)	`TreasuryStockCommonShares`	1.09B	shares	Point-in-time
Treasury stock (in shares)	`TreasuryStockCommonShares`	1.09B	shares	Point-in-time
Total current assets	`AssetsCurrent`	$38.78B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$38.78B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$47.56B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$47.56B	USD	Point-in-time
Investments	`MarketableSecuritiesNoncurrent`	$463.00M	USD	Point-in-time
Investments	`MarketableSecuritiesNoncurrent`	$463.00M	USD	Point-in-time
Investments	`MarketableSecuritiesNoncurrent`	$1.12B	USD	Point-in-time
Investments	`MarketableSecuritiesNoncurrent`	$1.12B	USD	Point-in-time
Property, Plant and Equipment, at cost, net of accumulated depreciation of $20,605 in 2025 and $19,155 in 2024	`PropertyPlantAndEquipmentNet`	$23.78B	USD	Point-in-time
Property, Plant and Equipment, at cost, net of accumulated depreciation of $20,605 in 2025 and $19,155 in 2024	`PropertyPlantAndEquipmentNet`	$23.78B	USD	Point-in-time
Property, Plant and Equipment, at cost, net of accumulated depreciation of $20,605 in 2025 and $19,155 in 2024	`PropertyPlantAndEquipmentNet`	$25.64B	USD	Point-in-time
Property, Plant and Equipment, at cost, net of accumulated depreciation of $20,605 in 2025 and $19,155 in 2024	`PropertyPlantAndEquipmentNet`	$25.64B	USD	Point-in-time
Goodwill	`Goodwill`	$21.67B	USD	Point-in-time
Goodwill	`Goodwill`	$21.67B	USD	Point-in-time
Goodwill	`Goodwill`	$21.59B	USD	Point-in-time
Goodwill	`Goodwill`	$21.59B	USD	Point-in-time
Other Intangibles, Net	`IntangibleAssetsNetExcludingGoodwill`	$16.37B	USD	Point-in-time
Other Intangibles, Net	`IntangibleAssetsNetExcludingGoodwill`	$16.37B	USD	Point-in-time
Other Intangibles, Net	`IntangibleAssetsNetExcludingGoodwill`	$15.31B	USD	Point-in-time
Other Intangibles, Net	`IntangibleAssetsNetExcludingGoodwill`	$15.31B	USD	Point-in-time
Other Assets	`OtherAssetsNoncurrent`	$16.04B	USD	Point-in-time
Other Assets	`OtherAssetsNoncurrent`	$16.04B	USD	Point-in-time
Other Assets	`OtherAssetsNoncurrent`	$18.33B	USD	Point-in-time
Other Assets	`OtherAssetsNoncurrent`	$18.33B	USD	Point-in-time
Total Assets	`Assets`	$117.11B	USD	Point-in-time
Total Assets	`Assets`	$117.11B	USD	Point-in-time
Total Assets	`Assets`	$129.55B	USD	Point-in-time
Total Assets	`Assets`	$129.55B	USD	Point-in-time
Loans payable and current portion of long-term debt	`DebtCurrent`	$2.65B	USD	Point-in-time
Loans payable and current portion of long-term debt	`DebtCurrent`	$2.65B	USD	Point-in-time
Loans payable and current portion of long-term debt	`DebtCurrent`	$1.41B	USD	Point-in-time
Loans payable and current portion of long-term debt	`DebtCurrent`	$1.41B	USD	Point-in-time
Trade accounts payable	`AccountsPayableCurrent`	$4.08B	USD	Point-in-time
Trade accounts payable	`AccountsPayableCurrent`	$4.08B	USD	Point-in-time
Trade accounts payable	`AccountsPayableCurrent`	$4.15B	USD	Point-in-time
Trade accounts payable	`AccountsPayableCurrent`	$4.15B	USD	Point-in-time
Accrued and other current liabilities	`OtherLiabilitiesCurrent`	$15.69B	USD	Point-in-time
Accrued and other current liabilities	`OtherLiabilitiesCurrent`	$15.69B	USD	Point-in-time
Accrued and other current liabilities	`OtherLiabilitiesCurrent`	$16.19B	USD	Point-in-time
Accrued and other current liabilities	`OtherLiabilitiesCurrent`	$16.19B	USD	Point-in-time
Income taxes payable	`AccruedIncomeTaxesCurrent`	$3.91B	USD	Point-in-time
Income taxes payable	`AccruedIncomeTaxesCurrent`	$3.91B	USD	Point-in-time
Income taxes payable	`AccruedIncomeTaxesCurrent`	$4.85B	USD	Point-in-time
Income taxes payable	`AccruedIncomeTaxesCurrent`	$4.85B	USD	Point-in-time
Dividends payable	`DividendsPayableCurrent`	$2.08B	USD	Point-in-time
Dividends payable	`DividendsPayableCurrent`	$2.08B	USD	Point-in-time
Dividends payable	`DividendsPayableCurrent`	$2.04B	USD	Point-in-time
Dividends payable	`DividendsPayableCurrent`	$2.04B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$28.42B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$28.42B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$28.63B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$28.63B	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$34.46B	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$34.46B	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$39.97B	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$39.97B	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.39B	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.39B	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.38B	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$1.38B	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$6.46B	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$6.46B	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$7.66B	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$7.66B	USD	Point-in-time
Common stock, $0.50 par value Authorized - 6,500,000,000 shares Issued - 3,577,103,522 shares in 2025 and 2024	`CommonStockValue`	$1.79B	USD	Point-in-time
Common stock, $0.50 par value Authorized - 6,500,000,000 shares Issued - 3,577,103,522 shares in 2025 and 2024	`CommonStockValue`	$1.79B	USD	Point-in-time
Common stock, $0.50 par value Authorized - 6,500,000,000 shares Issued - 3,577,103,522 shares in 2025 and 2024	`CommonStockValue`	$1.79B	USD	Point-in-time
Common stock, $0.50 par value Authorized - 6,500,000,000 shares Issued - 3,577,103,522 shares in 2025 and 2024	`CommonStockValue`	$1.79B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$44.70B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$44.70B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$44.83B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$44.83B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$63.07B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$63.07B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$72.23B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$72.23B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.95B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.95B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-5.20B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-5.20B	USD	Point-in-time
Stockholders' equity before deduction for treasury stock	`StockholdersEquityBeforeTreasuryStock`	$104.62B	USD	Point-in-time
Stockholders' equity before deduction for treasury stock	`StockholdersEquityBeforeTreasuryStock`	$104.62B	USD	Point-in-time
Stockholders' equity before deduction for treasury stock	`StockholdersEquityBeforeTreasuryStock`	$113.65B	USD	Point-in-time
Stockholders' equity before deduction for treasury stock	`StockholdersEquityBeforeTreasuryStock`	$113.65B	USD	Point-in-time
Less treasury stock, at cost: 1,089,754,712 shares in 2025 and 1,049,466,187 shares in 2024	`TreasuryStockCommonValue`	$58.30B	USD	Point-in-time
Less treasury stock, at cost: 1,089,754,712 shares in 2025 and 1,049,466,187 shares in 2024	`TreasuryStockCommonValue`	$58.30B	USD	Point-in-time
Less treasury stock, at cost: 1,089,754,712 shares in 2025 and 1,049,466,187 shares in 2024	`TreasuryStockCommonValue`	$61.80B	USD	Point-in-time
Less treasury stock, at cost: 1,089,754,712 shares in 2025 and 1,049,466,187 shares in 2024	`TreasuryStockCommonValue`	$61.80B	USD	Point-in-time
Total Merck & Co., Inc. stockholders equity	`StockholdersEquity`	$46.31B	USD	Point-in-time
Total Merck & Co., Inc. stockholders equity	`StockholdersEquity`	$46.31B	USD	Point-in-time
Total Merck & Co., Inc. stockholders equity	`StockholdersEquity`	$51.85B	USD	Point-in-time
Total Merck & Co., Inc. stockholders equity	`StockholdersEquity`	$51.85B	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$59.00M	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$59.00M	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$57.00M	USD	Point-in-time
Noncontrolling Interests	`MinorityInterest`	$57.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$37.63B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$37.63B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$43.65B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$43.65B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$44.56B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$44.56B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$46.37B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$46.37B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$49.06B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$49.06B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$51.91B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$51.91B	USD	Point-in-time
Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$117.11B	USD	Point-in-time
Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$117.11B	USD	Point-in-time
Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$129.55B	USD	Point-in-time
Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$129.55B	USD	Point-in-time

Income Statement 112 line items

Line Item	Tag	Value	Unit	Period
Sales	`Revenues`	$16.66B	USD	1 Quarter
Sales	`Revenues`	$16.66B	USD	1 Quarter
Sales	`Revenues`	$48.54B	USD	3 Qtrs
Sales	`Revenues`	$48.54B	USD	3 Qtrs
Sales	`Revenues`	$17.28B	USD	1 Quarter
Sales	`Revenues`	$17.28B	USD	1 Quarter
Sales	`Revenues`	$48.61B	USD	3 Qtrs
Sales	`Revenues`	$48.61B	USD	3 Qtrs
Cost of sales	`CostOfGoodsAndServicesSold`	$4.08B	USD	1 Quarter
Cost of sales	`CostOfGoodsAndServicesSold`	$4.08B	USD	1 Quarter
Cost of sales	`CostOfGoodsAndServicesSold`	$11.37B	USD	3 Qtrs
Cost of sales	`CostOfGoodsAndServicesSold`	$11.37B	USD	3 Qtrs
Cost of sales	`CostOfGoodsAndServicesSold`	$3.85B	USD	1 Quarter
Cost of sales	`CostOfGoodsAndServicesSold`	$3.85B	USD	1 Quarter
Cost of sales	`CostOfGoodsAndServicesSold`	$10.83B	USD	3 Qtrs
Cost of sales	`CostOfGoodsAndServicesSold`	$10.83B	USD	3 Qtrs
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$2.73B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$2.73B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$7.95B	USD	3 Qtrs
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$7.95B	USD	3 Qtrs
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$2.63B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$2.63B	USD	1 Quarter
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$7.83B	USD	3 Qtrs
Selling, general and administrative	`SellingGeneralAndAdministrativeExpense`	$7.83B	USD	3 Qtrs
Research and development	`ResearchAndDevelopmentExpense`	$5.86B	USD	1 Quarter
Research and development	`ResearchAndDevelopmentExpense`	$5.86B	USD	1 Quarter
Research and development	`ResearchAndDevelopmentExpense`	$13.35B	USD	3 Qtrs
Research and development	`ResearchAndDevelopmentExpense`	$13.35B	USD	3 Qtrs
Research and development	`ResearchAndDevelopmentExpense`	$4.23B	USD	1 Quarter
Research and development	`ResearchAndDevelopmentExpense`	$4.23B	USD	1 Quarter
Research and development	`ResearchAndDevelopmentExpense`	$11.90B	USD	3 Qtrs
Research and development	`ResearchAndDevelopmentExpense`	$11.90B	USD	3 Qtrs
Restructuring costs	`RestructuringCharges`	$56.00M	USD	1 Quarter
Restructuring costs	`RestructuringCharges`	$56.00M	USD	1 Quarter
Restructuring costs	`RestructuringCharges`	$258.00M	USD	3 Qtrs
Restructuring costs	`RestructuringCharges`	$258.00M	USD	3 Qtrs
Restructuring costs	`RestructuringCharges`	$47.00M	USD	1 Quarter
Restructuring costs	`RestructuringCharges`	$47.00M	USD	1 Quarter
Restructuring costs	`RestructuringCharges`	$676.00M	USD	3 Qtrs
Restructuring costs	`RestructuringCharges`	$676.00M	USD	3 Qtrs
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$162.00M	USD	1 Quarter
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$162.00M	USD	1 Quarter
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$151.00M	USD	3 Qtrs
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$151.00M	USD	3 Qtrs
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$238.00M	USD	1 Quarter
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$238.00M	USD	1 Quarter
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$281.00M	USD	3 Qtrs
Other (income) expense, net	`OtherNonoperatingIncomeExpense`	$281.00M	USD	3 Qtrs
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$12.57B	USD	1 Quarter
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$12.57B	USD	1 Quarter
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$32.78B	USD	3 Qtrs
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$32.78B	USD	3 Qtrs
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$10.53B	USD	1 Quarter
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$10.53B	USD	1 Quarter
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$30.96B	USD	3 Qtrs
Total Costs, Expenses and Other	`CostsExpensesAndOther`	$30.96B	USD	3 Qtrs
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$4.09B	USD	1 Quarter
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$4.09B	USD	1 Quarter
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$15.77B	USD	3 Qtrs
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$15.77B	USD	3 Qtrs
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$6.75B	USD	1 Quarter
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$6.75B	USD	1 Quarter
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$17.65B	USD	3 Qtrs
Income Before Taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$17.65B	USD	3 Qtrs
Taxes on Income	`IncomeTaxExpenseBenefit`	$929.00M	USD	1 Quarter
Taxes on Income	`IncomeTaxExpenseBenefit`	$929.00M	USD	1 Quarter
Taxes on Income	`IncomeTaxExpenseBenefit`	$2.38B	USD	3 Qtrs
Taxes on Income	`IncomeTaxExpenseBenefit`	$2.38B	USD	3 Qtrs
Taxes on Income	`IncomeTaxExpenseBenefit`	$958.00M	USD	1 Quarter
Taxes on Income	`IncomeTaxExpenseBenefit`	$958.00M	USD	1 Quarter
Taxes on Income	`IncomeTaxExpenseBenefit`	$2.35B	USD	3 Qtrs
Taxes on Income	`IncomeTaxExpenseBenefit`	$2.35B	USD	3 Qtrs
Net Income	`ProfitLoss`	$3.16B	USD	1 Quarter
Net Income	`ProfitLoss`	$3.16B	USD	1 Quarter
Net Income	`ProfitLoss`	$13.39B	USD	3 Qtrs
Net Income	`ProfitLoss`	$13.39B	USD	3 Qtrs
Net Income	`ProfitLoss`	$5.79B	USD	1 Quarter
Net Income	`ProfitLoss`	$5.79B	USD	1 Quarter
Net Income	`ProfitLoss`	$15.30B	USD	3 Qtrs
Net Income	`ProfitLoss`	$15.30B	USD	3 Qtrs
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$4.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$4.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$15.00M	USD	3 Qtrs
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$15.00M	USD	3 Qtrs
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.00M	USD	1 Quarter
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$10.00M	USD	3 Qtrs
Less: Net Income Attributable to Noncontrolling Interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$10.00M	USD	3 Qtrs
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$3.16B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$3.16B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$13.37B	USD	3 Qtrs
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$13.37B	USD	3 Qtrs
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$5.79B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$5.79B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$15.29B	USD	3 Qtrs
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$15.29B	USD	3 Qtrs
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$1.25	USD	1 Quarter
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$1.25	USD	1 Quarter
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$5.28	USD	3 Qtrs
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$5.28	USD	3 Qtrs
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$2.32	USD	1 Quarter
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$2.32	USD	1 Quarter
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$6.09	USD	3 Qtrs
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareBasic`	$6.09	USD	3 Qtrs
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$1.24	USD	1 Quarter
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$1.24	USD	1 Quarter
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$5.26	USD	3 Qtrs
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$5.26	USD	3 Qtrs
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$2.32	USD	1 Quarter
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$2.32	USD	1 Quarter
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$6.08	USD	3 Qtrs
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders (in dollars per share)	`EarningsPerShareDiluted`	$6.08	USD	3 Qtrs

Cash Flow Statement 148 line items

Line Item	Tag	Value	Unit	Period
Restricted cash	`RestrictedCashAndCashEquivalents`	$68.00M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$68.00M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$95.00M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$95.00M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$76.00M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$76.00M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$91.00M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$91.00M	USD	Point-in-time
Net income	`ProfitLoss`	$3.16B	USD	1 Quarter
Net income	`ProfitLoss`	$3.16B	USD	1 Quarter
Net income	`ProfitLoss`	$13.39B	USD	3 Qtrs
Net income	`ProfitLoss`	$13.39B	USD	3 Qtrs
Net income	`ProfitLoss`	$5.79B	USD	1 Quarter
Net income	`ProfitLoss`	$5.79B	USD	1 Quarter
Net income	`ProfitLoss`	$15.30B	USD	3 Qtrs
Net income	`ProfitLoss`	$15.30B	USD	3 Qtrs
Amortization	`AdjustmentForAmortization`	$1.72B	USD	3 Qtrs
Amortization	`AdjustmentForAmortization`	$1.72B	USD	3 Qtrs
Amortization	`AdjustmentForAmortization`	$1.82B	USD	3 Qtrs
Amortization	`AdjustmentForAmortization`	$1.82B	USD	3 Qtrs
Depreciation	`Depreciation`	$1.58B	USD	3 Qtrs
Depreciation	`Depreciation`	$1.58B	USD	3 Qtrs
Depreciation	`Depreciation`	$1.55B	USD	3 Qtrs
Depreciation	`Depreciation`	$1.55B	USD	3 Qtrs
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$-31.00M	USD	1 Quarter
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$-31.00M	USD	1 Quarter
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$169.00M	USD	3 Qtrs
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$169.00M	USD	3 Qtrs
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$373.00M	USD	1 Quarter
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$373.00M	USD	1 Quarter
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$563.00M	USD	3 Qtrs
Income from investments in equity securities, net	`EquitySecuritiesFvNiGainLoss`	$563.00M	USD	3 Qtrs
Charges for research and development asset acquisitions	`ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff`	$2.76B	USD	3 Qtrs
Charges for research and development asset acquisitions	`ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff`	$2.76B	USD	3 Qtrs
Charges for research and development asset acquisitions	`ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff`	-	USD	3 Qtrs
Charges for research and development asset acquisitions	`ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff`	-	USD	3 Qtrs
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-633.00M	USD	3 Qtrs
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-633.00M	USD	3 Qtrs
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-846.00M	USD	3 Qtrs
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-846.00M	USD	3 Qtrs
Share-based compensation	`ShareBasedCompensation`	$574.00M	USD	3 Qtrs
Share-based compensation	`ShareBasedCompensation`	$574.00M	USD	3 Qtrs
Share-based compensation	`ShareBasedCompensation`	$615.00M	USD	3 Qtrs
Share-based compensation	`ShareBasedCompensation`	$615.00M	USD	3 Qtrs
Other	`OtherNoncashIncomeExpense`	$-611.00M	USD	3 Qtrs
Other	`OtherNoncashIncomeExpense`	$-611.00M	USD	3 Qtrs
Other	`OtherNoncashIncomeExpense`	$-393.00M	USD	3 Qtrs
Other	`OtherNoncashIncomeExpense`	$-393.00M	USD	3 Qtrs
Net changes in assets and liabilities	`IncreaseDecreaseInOperatingCapital`	$1.81B	USD	3 Qtrs
Net changes in assets and liabilities	`IncreaseDecreaseInOperatingCapital`	$1.81B	USD	3 Qtrs
Net changes in assets and liabilities	`IncreaseDecreaseInOperatingCapital`	$4.66B	USD	3 Qtrs
Net changes in assets and liabilities	`IncreaseDecreaseInOperatingCapital`	$4.66B	USD	3 Qtrs
Net Cash Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$18.02B	USD	3 Qtrs
Net Cash Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$18.02B	USD	3 Qtrs
Net Cash Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$13.62B	USD	3 Qtrs
Net Cash Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$13.62B	USD	3 Qtrs
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.44B	USD	3 Qtrs
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$2.44B	USD	3 Qtrs
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$3.08B	USD	3 Qtrs
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$3.08B	USD	3 Qtrs
Purchases of securities and other investments	`PaymentsToAcquireInvestments`	$64.00M	USD	3 Qtrs
Purchases of securities and other investments	`PaymentsToAcquireInvestments`	$64.00M	USD	3 Qtrs
Purchases of securities and other investments	`PaymentsToAcquireInvestments`	$1.21B	USD	3 Qtrs
Purchases of securities and other investments	`PaymentsToAcquireInvestments`	$1.21B	USD	3 Qtrs
Proceeds from sales of securities and other investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$370.00M	USD	3 Qtrs
Proceeds from sales of securities and other investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$370.00M	USD	3 Qtrs
Proceeds from sales of securities and other investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$1.63B	USD	3 Qtrs
Proceeds from sales of securities and other investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$1.63B	USD	3 Qtrs
Acquisition of Eyebiotech Limited, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$1.34B	USD	3 Qtrs
Acquisition of Eyebiotech Limited, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$1.34B	USD	3 Qtrs
Acquisition of Eyebiotech Limited, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	-	USD	3 Qtrs
Acquisition of Eyebiotech Limited, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	-	USD	3 Qtrs
Acquisition of Elanco Animal Health Incorporated aqua business	`PaymentsToAcquireBusinessFour`	$1.30B	USD	3 Qtrs
Acquisition of Elanco Animal Health Incorporated aqua business	`PaymentsToAcquireBusinessFour`	$1.30B	USD	3 Qtrs
Acquisition of Elanco Animal Health Incorporated aqua business	`PaymentsToAcquireBusinessFour`	-	USD	3 Qtrs
Acquisition of Elanco Animal Health Incorporated aqua business	`PaymentsToAcquireBusinessFour`	-	USD	3 Qtrs
Acquisition of Harpoon Therapeutics, Inc., net of cash acquired	`PaymentsToAcquireBusinessThreeNetOfCashAcquired`	$746.00M	USD	3 Qtrs
Acquisition of Harpoon Therapeutics, Inc., net of cash acquired	`PaymentsToAcquireBusinessThreeNetOfCashAcquired`	$746.00M	USD	3 Qtrs
Acquisition of Harpoon Therapeutics, Inc., net of cash acquired	`PaymentsToAcquireBusinessThreeNetOfCashAcquired`	-	USD	3 Qtrs
Acquisition of Harpoon Therapeutics, Inc., net of cash acquired	`PaymentsToAcquireBusinessThreeNetOfCashAcquired`	-	USD	3 Qtrs
Acquisition of MK-1045 (formerly CN201) from Curon Pharmaceutical	`PaymentsToAcquireGlobalRights`	$700.00M	USD	3 Qtrs
Acquisition of MK-1045 (formerly CN201) from Curon Pharmaceutical	`PaymentsToAcquireGlobalRights`	$700.00M	USD	3 Qtrs
Acquisition of MK-1045 (formerly CN201) from Curon Pharmaceutical	`PaymentsToAcquireGlobalRights`	-	USD	3 Qtrs
Acquisition of MK-1045 (formerly CN201) from Curon Pharmaceutical	`PaymentsToAcquireGlobalRights`	-	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$70.00M	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$70.00M	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-114.00M	USD	3 Qtrs
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-114.00M	USD	3 Qtrs
Net Cash Used in Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-6.29B	USD	3 Qtrs
Net Cash Used in Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-6.29B	USD	3 Qtrs
Net Cash Used in Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.54B	USD	3 Qtrs
Net Cash Used in Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-2.54B	USD	3 Qtrs
Net change in short-term borrowings	`ProceedsFromRepaymentsOfShortTermDebt`	-	USD	3 Qtrs
Net change in short-term borrowings	`ProceedsFromRepaymentsOfShortTermDebt`	-	USD	3 Qtrs
Net change in short-term borrowings	`ProceedsFromRepaymentsOfShortTermDebt`	$63.00M	USD	3 Qtrs
Net change in short-term borrowings	`ProceedsFromRepaymentsOfShortTermDebt`	$63.00M	USD	3 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfDebt`	$3.60B	USD	3 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfDebt`	$3.60B	USD	3 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfDebt`	$5.96B	USD	3 Qtrs
Proceeds from issuance of debt	`ProceedsFromIssuanceOfDebt`	$5.96B	USD	3 Qtrs
Payments on debt	`RepaymentsOfLongTermDebt`	$751.00M	USD	3 Qtrs
Payments on debt	`RepaymentsOfLongTermDebt`	$751.00M	USD	3 Qtrs
Payments on debt	`RepaymentsOfLongTermDebt`	$2.50B	USD	3 Qtrs
Payments on debt	`RepaymentsOfLongTermDebt`	$2.50B	USD	3 Qtrs
Dividends paid to stockholders	`PaymentsOfDividendsCommonStock`	$5.89B	USD	3 Qtrs
Dividends paid to stockholders	`PaymentsOfDividendsCommonStock`	$5.89B	USD	3 Qtrs
Dividends paid to stockholders	`PaymentsOfDividendsCommonStock`	$6.16B	USD	3 Qtrs
Dividends paid to stockholders	`PaymentsOfDividendsCommonStock`	$6.16B	USD	3 Qtrs
Purchases of treasury stock	`PaymentsForRepurchaseOfCommonStock`	$817.00M	USD	3 Qtrs
Purchases of treasury stock	`PaymentsForRepurchaseOfCommonStock`	$817.00M	USD	3 Qtrs
Purchases of treasury stock	`PaymentsForRepurchaseOfCommonStock`	$3.83B	USD	3 Qtrs
Purchases of treasury stock	`PaymentsForRepurchaseOfCommonStock`	$3.83B	USD	3 Qtrs
Proceeds from exercise of stock options	`ProceedsFromStockOptionsExercised`	$165.00M	USD	3 Qtrs
Proceeds from exercise of stock options	`ProceedsFromStockOptionsExercised`	$165.00M	USD	3 Qtrs
Proceeds from exercise of stock options	`ProceedsFromStockOptionsExercised`	$45.00M	USD	3 Qtrs
Proceeds from exercise of stock options	`ProceedsFromStockOptionsExercised`	$45.00M	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-330.00M	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-330.00M	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-252.00M	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-252.00M	USD	3 Qtrs
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-4.02B	USD	3 Qtrs
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-4.02B	USD	3 Qtrs
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-6.67B	USD	3 Qtrs
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-6.67B	USD	3 Qtrs
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$74.00M	USD	3 Qtrs
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$74.00M	USD	3 Qtrs
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$540.00M	USD	3 Qtrs
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$540.00M	USD	3 Qtrs
Net Increase in Cash, Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$7.78B	USD	3 Qtrs
Net Increase in Cash, Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$7.78B	USD	3 Qtrs
Net Increase in Cash, Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$4.94B	USD	3 Qtrs
Net Increase in Cash, Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$4.94B	USD	3 Qtrs
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$6.91B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$6.91B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$14.69B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$14.69B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.32B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.32B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$18.26B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes restricted cash of $76 and $68 at January 1, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$18.26B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$6.91B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$6.91B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$14.69B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$14.69B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.32B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$13.32B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$18.26B	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash at End of Period (includes restricted cash of $91 and $95 at September 30, 2025 and 2024, respectively, included in Other current assets)	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$18.26B	USD	Point-in-time

Comprehensive Income 48 line items

Line Item	Tag	Value	Unit	Period
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$3.16B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$3.16B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$13.37B	USD	3 Qtrs
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$13.37B	USD	3 Qtrs
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$5.79B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$5.79B	USD	1 Quarter
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$15.29B	USD	3 Qtrs
Net Income Attributable to Merck & Co., Inc.	`NetIncomeLoss`	$15.29B	USD	3 Qtrs
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-296.00M	USD	1 Quarter
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-296.00M	USD	1 Quarter
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-99.00M	USD	3 Qtrs
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-99.00M	USD	3 Qtrs
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$170.00M	USD	1 Quarter
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$170.00M	USD	1 Quarter
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-457.00M	USD	3 Qtrs
Net unrealized gain (loss) on derivatives, net of reclassifications	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-457.00M	USD	3 Qtrs
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$13.00M	USD	1 Quarter
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$13.00M	USD	1 Quarter
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$28.00M	USD	3 Qtrs
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$28.00M	USD	3 Qtrs
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$-74.00M	USD	1 Quarter
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$-74.00M	USD	1 Quarter
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$-48.00M	USD	3 Qtrs
Benefit plan net gain (loss) and prior service credit (cost), net of amortization	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$-48.00M	USD	3 Qtrs
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$299.00M	USD	1 Quarter
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$299.00M	USD	1 Quarter
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-83.00M	USD	3 Qtrs
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-83.00M	USD	3 Qtrs
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-25.00M	USD	1 Quarter
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-25.00M	USD	1 Quarter
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$152.00M	USD	3 Qtrs
Cumulative translation adjustment	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$152.00M	USD	3 Qtrs
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-10.00M	USD	1 Quarter
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-10.00M	USD	1 Quarter
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-210.00M	USD	3 Qtrs
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-210.00M	USD	3 Qtrs
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$219.00M	USD	1 Quarter
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$219.00M	USD	1 Quarter
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-257.00M	USD	3 Qtrs
Other comprehensive income (loss), net of taxes	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-257.00M	USD	3 Qtrs
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$3.15B	USD	1 Quarter
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$3.15B	USD	1 Quarter
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$13.16B	USD	3 Qtrs
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$13.16B	USD	3 Qtrs
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$6.00B	USD	1 Quarter
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$6.00B	USD	1 Quarter
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$15.03B	USD	3 Qtrs
Comprehensive Income Attributable to Merck & Co., Inc.	`ComprehensiveIncomeNetOfTax`	$15.03B	USD	3 Qtrs

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.