$MRK
Merck & Co., Inc. Stock $mrk

$mrk Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000162828023005061 Filed on February 24, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$14.49B	$13.83B	$59.28B
YoY Change	-8.89%	2.29%	21.72%
Cost Of Revenue	$3.352B	$3.361B	$15.15B
YoY Change	-37.7%	-12.18%	11.16%
Gross Profit	$11.14B	$10.47B	$44.14B
YoY Change	5.84%	7.99%	25.82%
Gross Profit Margin	76.86%	75.7%	74.45%
Selling, General & Admin	$2.458B	$2.628B	$9.772B
YoY Change	5.81%	-6.81%	1.43%
% of Gross Profit	22.07%	25.1%	22.14%
Research & Development	$4.266B	$3.035B	$11.84B
YoY Change	65.61%	-0.85%	-3.29%
% of Gross Profit	38.31%	28.99%	26.83%
Depreciation & Amortization	$448.0M	$892.0M	$1.800B
YoY Change	6.41%	6.83%	12.5%
% of Gross Profit	4.02%	8.52%	4.08%
Operating Expenses	$6.724B	$5.663B	$21.61B
YoY Change	37.25%	-3.71%	-1.21%
Operating Profit	$4.411B	$4.806B	$22.52B
YoY Change	-21.54%	26.04%	70.63%
Interest Expense	$429.0M	-$80.00M	-$1.348B
YoY Change	76.54%	-172.73%	-267.25%
% of Operating Profit	9.73%	-1.66%	-5.99%
Other Income/Expense, Net	-$503.0M	$86.00M	-$360.0M
YoY Change	-28.95%	-61.61%	-126.85%
Pretax Income	$3.650B	$3.513B	$16.44B
YoY Change	-24.91%	-10.13%	18.48%
Income Tax	$825.0M	$495.0M	$1.918B
% Of Pretax Income	22.6%	14.09%	11.66%
Net Earnings	$2.821B	$3.017B	$14.52B
YoY Change	-34.55%	-19.72%	11.27%
Net Earnings / Revenue	19.47%	21.81%	24.49%
Basic Earnings Per Share	$1.11		$5.73
Diluted Earnings Per Share	$1.11	$1.184M	$5.712M
COMMON SHARES
Basic Shares Outstanding	2.539B shares	2.535B shares	2.532B shares
Diluted Shares Outstanding	2.551B shares		2.542B shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$10.39B	$13.19B	$13.19B
YoY Change	16.34%	62.94%	62.94%
Cash & Equivalents	$9.707B	$12.69B	$12.69B
Short-Term Investments	$680.0M	$498.0M	$498.0M
Other Short-Term Assets	$6.737B	$7.169B	$7.169B
YoY Change	1.25%	2.6%	2.6%
Inventory	$5.863B	$5.911B	$5.911B
Prepaid Expenses
Receivables	$10.42B	$9.450B	$9.450B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$33.40B	$35.72B	$35.72B
YoY Change	7.11%	18.03%	18.03%
LONG-TERM ASSETS
Property, Plant & Equipment	$21.76B	$21.42B	$22.77B
YoY Change	10.18%	11.12%	18.1%
Goodwill	$21.21B	$21.20B
YoY Change	-0.23%	-0.28%
Intangibles	$19.86B	$20.27B
YoY Change	-13.75%	-11.62%
Long-Term Investments	$2.232B	$1.847B	$1.847B
YoY Change	132.74%	91.2%	91.2%
Other Assets	$9.338B	$8.696B	$7.350B
YoY Change	-11.05%	-20.84%	-33.1%
Total Long-Term Assets	$74.39B	$73.44B	$73.44B
YoY Change	-1.44%	-2.64%	-2.64%
TOTAL ASSETS
Total Short-Term Assets	$33.40B	$35.72B	$35.72B
Total Long-Term Assets	$74.39B	$73.44B	$73.44B
Total Assets	$107.8B	$109.2B	$109.2B
YoY Change	1.06%	3.28%	3.28%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.680B	$4.264B	$4.264B
YoY Change	-0.94%	-7.49%	-7.49%
Accrued Expenses	$13.00B	$14.16B	$14.16B
YoY Change	-7.48%	2.16%	2.16%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$2.672B	$1.700B	$1.946B
YoY Change	121.19%	-26.09%	-19.32%
Total Short-Term Liabilities	$23.13B	$24.24B	$24.24B
YoY Change	3.65%	1.54%	1.54%
LONG-TERM LIABILITIES
Long-Term Debt	$28.07B	$28.75B	$28.75B
YoY Change	-8.21%	-6.34%	-6.34%
Other Long-Term Liabilities	$8.244B	$8.323B	$8.323B
YoY Change	-15.38%	-11.78%	-11.78%
Total Long-Term Liabilities	$36.32B	$37.07B	$37.07B
YoY Change	-9.94%	-7.62%	-7.62%
TOTAL LIABILITIES
Total Short-Term Liabilities	$23.13B	$24.24B	$24.24B
Total Long-Term Liabilities	$36.32B	$37.07B	$37.07B
Total Liabilities	$59.45B	$61.31B	$63.17B
YoY Change	-5.1%	-4.2%	-6.43%
SHAREHOLDERS EQUITY
Retained Earnings	$62.04B	$61.08B
YoY Change	10.29%	13.75%
Common Stock	$46.26B	$46.17B
YoY Change	0.42%	0.31%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$46.83B	$45.99B	$45.99B
YoY Change
Total Liabilities & Shareholders Equity	$107.8B	$109.2B	$109.2B
YoY Change	1.06%	3.28%	3.28%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$2.821B	$3.017B	$14.52B
YoY Change	-34.55%	-19.72%	11.27%
Depreciation, Depletion And Amortization	$448.0M	$892.0M	$1.800B
YoY Change	6.41%	6.83%	12.5%
Cash From Operating Activities	$1.339B	$4.430B	$19.10B
YoY Change	-71.88%	-11.95%	35.34%
INVESTING ACTIVITIES
Capital Expenditures	$1.007B	$1.149B	$4.388B
YoY Change	-202.34%	-195.12%	-198.65%
Acquisitions	$0.00		$121.0M
YoY Change			-32.4%
Other Investing Activities	-$37.00M	-$599.0M	-$32.00M
YoY Change	-79.67%	-94.47%	-135.16%
Cash From Investing Activities	-$2.359B	-$1.748B	-$4.960B
YoY Change	101.11%	-85.49%	-70.04%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$1.000M		$2.251B
YoY Change	-99.92%		-2.93%
Cash From Financing Activities	-$2.054B	-1.554B	-9.119B
YoY Change	-33.44%	-129.84%	-451.68%
NET CHANGE
Cash From Operating Activities	$1.339B	4.430B	19.10B
Cash From Investing Activities	-$2.359B	-1.748B	-4.960B
Cash From Financing Activities	-$2.054B	-1.554B	-9.119B
Net Change In Cash	-$2.987B	1.128B	$4.606B
YoY Change	-768.23%	-162.29%	32800.0%
FREE CASH FLOW
Cash From Operating Activities	$1.339B	$4.430B	$19.10B
Capital Expenditures	$1.007B	$1.149B	$4.388B
Free Cash Flow	$332.0M	$3.281B	$14.71B
YoY Change	-94.22%	-47.41%	-20.75%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000310158
CY2020	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2022#OtherNonoperatingIncomeExpense
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CY2022	us-gaap	Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2022#OtherNonoperatingIncomeExpense
CY2020	us-gaap	Impairment Of Intangible Asset Finite Lived Statement Of Income Or Comprehensive Income Extensible Enumeration ImpairmentOfIntangibleAssetFiniteLivedStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2022#CostOfGoodsAndServicesSold
CY2022	us-gaap	Impairment Of Intangible Asset Indefinite Lived Excluding Goodwill Statement Of Income Or Comprehensive Income Extensible Enumeration ImpairmentOfIntangibleAssetIndefiniteLivedExcludingGoodwillStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2022#ResearchAndDevelopmentExpense
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#DeferredIncomeTaxesAndOtherAssetsNoncurrent
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#DeferredIncomeTaxesAndOtherAssetsNoncurrent
CY2022Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherLiabilitiesCurrent
CY2021Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherLiabilitiesCurrent
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherLiabilitiesNoncurrent
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherLiabilitiesNoncurrent
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage	0.3333
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	1-6571
CY2022	dei	Entity Registrant Name EntityRegistrantName	Merck & Co., Inc.
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	126 East Lincoln Avenue
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Rahway
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	NJ
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	07065
CY2022	dei	City Area Code CityAreaCode	908
CY2022	dei	Local Phone Number LocalPhoneNumber	740-4000
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NJ
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	22-1918501
CY2022	dei	Security12b Title Security12bTitle	Common Stock ($0.50 par value)
CY2022	dei	Trading Symbol TradingSymbol	MRK
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
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CY2022Q2	dei	Entity Public Float EntityPublicFloat	230820000000	usd
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CY2021Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	16303000000	usd
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CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	37471000000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	17985000000	usd
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CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	6500000000	shares
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CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1281000000	usd
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CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.64
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CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	840000000	usd
CY2021	us-gaap	Stockholders Equity Note Spinoff Transaction StockholdersEquityNoteSpinoffTransaction	5091000000	usd
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CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.80
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CY2022	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	14526000000	usd
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CY2022	mrk	Research And Development Asset Acquired Other Than Through Business Combination Written Off Asset Acquisition Two ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOffAssetAcquisitionTwo	0	usd
CY2021	mrk	Research And Development Asset Acquired Other Than Through Business Combination Written Off Asset Acquisition Two ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOffAssetAcquisitionTwo	0	usd
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CY2022	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	0	usd
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CY2021	mrk	Payments To Acquire Business Four Net Of Cash Acquired PaymentsToAcquireBusinessFourNetOfCashAcquired	0	usd
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CY2021	mrk	Payments To Acquire Business Five Net Of Cash Acquired PaymentsToAcquireBusinessFiveNetOfCashAcquired	0	usd
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CY2022	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	usd
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CY2021	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	-134000000	usd
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CY2022	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	usd
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CY2020	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	usd
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CY2021	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	349000000	usd
CY2020	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	2386000000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-410000000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-133000000	usd
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	253000000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	4606000000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	14000000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1769000000	usd
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	71000000	usd
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	103000000	usd
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	258000000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8167000000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8153000000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9934000000	usd
CY2022Q4	us-gaap	Disposal Group Including Discontinued Operation Cash And Cash Equivalents DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents	0	usd
CY2021Q4	us-gaap	Disposal Group Including Discontinued Operation Cash And Cash Equivalents DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents	0	usd
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Cash And Cash Equivalents DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents	12000000	usd
CY2022Q4	us-gaap	Restricted Cash RestrictedCash	79000000	usd
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	71000000	usd
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	103000000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	12773000000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8167000000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8153000000	usd
CY2022	us-gaap	Nature Of Operations NatureOfOperations	Nature of Operations<div style="margin-top:5pt;text-align:justify;text-indent:45pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Merck & Co., Inc. (Merck or the Company) is a global health care company that delivers innovative health solutions through its prescription medicines, including biologic therapies, vaccines and animal health products. The Company’s operations are principally managed on a product basis and include two operating segments, Pharmaceutical and Animal Health, both of which are reportable segments. </span></div><div style="margin-top:5pt;text-align:justify;text-indent:45pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The Pharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products consist of therapeutic and preventive agents, generally sold by prescription, for the treatment of human disorders. The Company sells these human health pharmaceutical products primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy benefit managers and other institutions. Human health vaccine products consist of preventive pediatric, adolescent and adult vaccines. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities. </span></div><div style="margin-top:5pt;text-align:justify;text-indent:45pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The Animal Health segment discovers, develops, manufactures and markets a wide range of veterinary pharmaceutical and vaccine products, as well as health management solutions and services, for the prevention, treatment and control of disease in all major livestock and companion animal species. The Company also offers an extensive suite of digitally connected identification, traceability and monitoring products. The Company sells its products to veterinarians, distributors, animal producers, farmers and pet owners. </span></div><div style="margin-top:9pt"><span style="color:#00857c;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%">Spin-Off of Organon & Co. </span></div><div style="margin-top:3pt;text-align:justify;text-indent:45pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">On June 2, 2021, Merck completed the spin-off of products from its women’s health, biosimilars and established brands businesses into a new, independent, publicly traded company named Organon & Co. (Organon) through a distribution of Organon’s publicly traded stock to Company shareholders. The distribution is expected to qualify and has been treated as tax-free to the Company and its shareholders for U.S. federal income tax purposes. The established brands included in the transaction consisted of dermatology, non-opioid pain management, respiratory, select cardiovascular products, as well as the rest of Merck’s diversified brands franchise. Merck’s existing research pipeline programs continue to be owned and developed within Merck as planned. The historical results of the businesses that were contributed to Organon in the spin-off have been reflected as discontinued operations in the Company’s consolidated financial statements through the date of the spin-off (see Note 3).</span></div>
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2022	mrk	Sales Discounts SalesDiscounts	12300000000	usd
CY2021	mrk	Sales Discounts SalesDiscounts	12300000000	usd
CY2020	mrk	Sales Discounts SalesDiscounts	11400000000	usd
CY2022Q4	mrk	Accrual For Chargebacks AccrualForChargebacks	178000000	usd
CY2022Q4	mrk	Accrual For Rebates AccrualForRebates	2700000000	usd
CY2021Q4	mrk	Accrual For Chargebacks AccrualForChargebacks	207000000	usd
CY2021Q4	mrk	Accrual For Rebates AccrualForRebates	2600000000	usd
CY2022	mrk	Revenue Recognition Goods Goods Return Period Afterto Expiration Date RevenueRecognitionGoodsGoodsReturnPeriodAftertoExpirationDate	P12M
CY2022	us-gaap	Depreciation Depreciation	1800000000	usd
CY2021	us-gaap	Depreciation Depreciation	1600000000	usd
CY2020	us-gaap	Depreciation Depreciation	1700000000	usd
CY2022	us-gaap	Advertising Expense AdvertisingExpense	2200000000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	2000000000	usd
CY2020	us-gaap	Advertising Expense AdvertisingExpense	1800000000	usd
CY2022	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<span style="color:#00857c;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%">Reclassifications —</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%"> </span>Certain reclassifications have been made to prior year amounts to conform to the current year presentation.
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#00857c;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%">Use of Estimates —</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The consolidated financial statements are prepared in conformity with accounting principles generally accepted in the U.S. (GAAP) and, accordingly, include certain amounts that are based on management’s best estimates and judgments. Estimates are used when accounting for amounts recorded in connection with acquisitions, including initial fair value determinations of assets and liabilities in a business combination (primarily IPR&D, other intangible assets and contingent consideration), as well as subsequent fair value measurements. Additionally, estimates are used in determining such items as provisions for sales discounts and returns, depreciable and amortizable lives, recoverability of inventories, including those produced in preparation for product launches, amounts recorded for contingencies, environmental liabilities, accruals for contingent sales-based milestone payments and other reserves, pension and other postretirement benefit plan assumptions, share-based compensation assumptions, restructuring costs, impairments of long-lived assets (including intangible assets and goodwill) and investments, and taxes on income. Because of the uncertainty inherent in such estimates, actual results may differ from these estimates.</span>
CY2021Q2	us-gaap	Disposal Group Including Discontinued Operation Consideration DisposalGroupIncludingDiscontinuedOperationConsideration	9000000000	usd
CY2021	us-gaap	Disposal Group Including Discontinued Operation Other Expense DisposalGroupIncludingDiscontinuedOperationOtherExpense	556000000	usd
CY2020	us-gaap	Disposal Group Including Discontinued Operation Other Expense DisposalGroupIncludingDiscontinuedOperationOtherExpense	743000000	usd
CY2021	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	2512000000	usd
CY2020	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	6476000000	usd
CY2021	us-gaap	Disposal Group Including Discontinued Operation Costs Of Goods Sold DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold	789000000	usd
CY2020	us-gaap	Disposal Group Including Discontinued Operation Costs Of Goods Sold DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold	1867000000	usd
CY2021	us-gaap	Disposal Group Including Discontinued Operation General And Administrative Expense DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense	877000000	usd
CY2020	us-gaap	Disposal Group Including Discontinued Operation General And Administrative Expense DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense	1513000000	usd
CY2021	mrk	Disposal Group Including Discontinued Operations Research And Development Expenses DisposalGroupIncludingDiscontinuedOperationsResearchAndDevelopmentExpenses	103000000	usd
CY2020	mrk	Disposal Group Including Discontinued Operations Research And Development Expenses DisposalGroupIncludingDiscontinuedOperationsResearchAndDevelopmentExpenses	161000000	usd
CY2021	mrk	Disposal Group Including Discontinued Operations Restructuring Costs DisposalGroupIncludingDiscontinuedOperationsRestructuringCosts	1000000	usd
CY2020	mrk	Disposal Group Including Discontinued Operations Restructuring Costs DisposalGroupIncludingDiscontinuedOperationsRestructuringCosts	3000000	usd
CY2021	mrk	Disposal Group Including Discontinued Operation Other Income Expense Net DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpenseNet	15000000	usd
CY2020	mrk	Disposal Group Including Discontinued Operation Other Income Expense Net DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpenseNet	-4000000	usd
CY2021	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	1755000000	usd
CY2020	us-gaap	Disposal Group Including Discontinued Operation Operating Expense DisposalGroupIncludingDiscontinuedOperationOperatingExpense	3548000000	usd
CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax	757000000	usd
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax	2928000000	usd
CY2021	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	50000000	usd
CY2020	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	369000000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	707000000	usd
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2559000000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	3000000	usd
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	11000000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	704000000	usd
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2548000000	usd
CY2022Q4	us-gaap	Restructuring And Related Cost Expected Cost1 RestructuringAndRelatedCostExpectedCost1	3700000000	usd
CY2022	mrk	Estimate Of Cumulative Pre Tax Costs That Will Result In Cash Outlays EstimateOfCumulativePreTaxCostsThatWillResultInCashOutlays	0.70
CY2022	mrk	Estimate Of Cumulative Pre Tax Costs That Will Be Noncash EstimateOfCumulativePreTaxCostsThatWillBeNoncash	0.30
CY2022	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	666000000	usd
CY2021	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	868000000	usd
CY2020	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	880000000	usd
CY2022Q4	us-gaap	Restructuring And Related Cost Cost Incurred To Date1 RestructuringAndRelatedCostCostIncurredToDate1	3300000000	usd
CY2022	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	666000000	usd
CY2021	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	868000000	usd
CY2020	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	880000000	usd
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	586000000	usd
CY2021	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	868000000	usd
CY2021	us-gaap	Payments For Restructuring PaymentsForRestructuring	608000000	usd
CY2021	mrk	Restructuring Reserve Increase Decrease Noncash Activity RestructuringReserveIncreaseDecreaseNoncashActivity	-209000000	usd
CY2021Q4	us-gaap	Restructuring Reserve RestructuringReserve	637000000	usd
CY2022	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	666000000	usd
CY2021Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	164000000	usd
CY2021Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	147000000	usd
CY2022	us-gaap	Payments For Restructuring PaymentsForRestructuring	449000000	usd
CY2022	mrk	Restructuring Reserve Increase Decrease Noncash Activity RestructuringReserveIncreaseDecreaseNoncashActivity	-341000000	usd
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	513000000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	433000000	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	409000000	usd
CY2022Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	28681000000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	549000000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	121000000	usd
CY2021Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	32958000000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	433000000	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	409000000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	549000000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	121000000	usd
CY2022Q4	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	220000000	usd
CY2022Q4	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	220000000	usd
CY2021Q4	us-gaap	Derivative Asset Not Offset Policy Election Deduction DerivativeAssetNotOffsetPolicyElectionDeduction	110000000	usd
CY2021Q4	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	110000000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	66000000	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	19000000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	170000000	usd
CY2021Q4	us-gaap	Derivative Asset Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeAssetFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	275000000	usd
CY2021Q4	us-gaap	Derivative Liability Fair Value Offset Against Collateral Net Of Not Subject To Master Netting Arrangement Policy Election DerivativeLiabilityFairValueOffsetAgainstCollateralNetOfNotSubjectToMasterNettingArrangementPolicyElection	11000000	usd
CY2022	us-gaap	Revenues Revenues	59283000000	usd
CY2021	us-gaap	Revenues Revenues	48704000000	usd
CY2020	us-gaap	Revenues Revenues	41518000000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1501000000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1341000000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	890000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-339000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1756000000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-441000000	usd
CY2022	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimated Net Amount To Be Transferred DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred	104000000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	569000000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	569000000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	86000000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	86000000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1284000000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1647000000	usd
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CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentCumulativeAmount	19000000	usd
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CY2020Q4	us-gaap	Equity Securities Fvni Noncurrent EquitySecuritiesFVNINoncurrent	800000000	usd
CY2022	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	-1000000000	usd
CY2021	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	1400000000	usd
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CY2021Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	777000000	usd
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CY2022	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	119000000	usd
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CY2022Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	456000000	usd
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CY2021Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	164000000	usd
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CY2021Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	1747000000	usd
CY2022Q4	us-gaap	Inventory Work In Process And Raw Materials InventoryWorkInProcessAndRawMaterials	7063000000	usd
CY2021Q4	us-gaap	Inventory Work In Process And Raw Materials InventoryWorkInProcessAndRawMaterials	6220000000	usd
CY2022Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	238000000	usd
CY2021Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	196000000	usd
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CY2021Q4	us-gaap	Inventory Gross InventoryGross	8163000000	usd
CY2022Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	293000000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	21264000000	usd
CY2021Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	16000000	usd
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CY2021Q4	mrk	Inventory Net And Inventory Noncurrent InventoryNetAndInventoryNoncurrent	8147000000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	5911000000	usd
CY2021Q4	us-gaap	Inventory Net InventoryNet	5953000000	usd
CY2022Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	2938000000	usd
CY2021Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	2194000000	usd
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CY2021Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	3300000000	usd
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CY2022	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-60000000	usd
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CY2021Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	531000000	usd
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CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	21477000000	usd
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CY2021Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	42438000000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	19505000000	usd
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CY2022	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	1700000000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2100000000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1600000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1700000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1600000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1500000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1300000000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1700000000	usd
CY2021Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2300000000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	28745000000	usd
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	30690000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1700000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1300000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	2500000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	2200000000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1500000000	usd
CY2022Q4	mrk	Long Term Debt Interest Payable Year One LongTermDebtInterestPayableYearOne	882000000	usd
CY2022Q4	mrk	Long Term Debt Interest Payable Year Two LongTermDebtInterestPayableYearTwo	845000000	usd
CY2022Q4	mrk	Long Term Debt Interest Payable Year Three LongTermDebtInterestPayableYearThree	778000000	usd
CY2022Q4	mrk	Long Term Debt Interest Payable Year Four LongTermDebtInterestPayableYearFour	751000000	usd
CY2022Q4	mrk	Long Term Debt Interest Payable Year Five LongTermDebtInterestPayableYearFive	720000000	usd
CY2022Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	6000000000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	334000000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	343000000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	340000000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	335000000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	340000000	usd
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	334000000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	57000000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	117000000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	473000000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1346000000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1586000000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	281000000	usd
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	304000000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1013000000	usd
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	1225000000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1294000000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1529000000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.026
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	323000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	258000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	224000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	157000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	126000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	404000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1492000000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	198000000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1294000000	usd
CY2022Q4	mrk	Lessee Operating Lease Lease Notyet Commenced Amount LesseeOperatingLeaseLeaseNotyetCommencedAmount	232000000	usd
CY2022	mrk	Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag	liabilities
CY2022Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	39000000	usd
CY2021Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	40000000	usd
CY2022	mrk	Term For Paying Off Environmental Liabilities TermForPayingOffEnvironmentalLiabilities	P15Y
CY2022	us-gaap	Environmental Exit Costs Reasonably Possible Additional Loss EnvironmentalExitCostsReasonablyPossibleAdditionalLoss	35000000	usd
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	6500000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	75.99
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	87000000	shares
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P3Y
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P3Y
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P3Y
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	541000000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	498000000	usd
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	475000000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	479000000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	441000000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	78000000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	69000000	usd
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	65000000	usd
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	87.10
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y10M24D
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y9M18D
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	77.67
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	15.45
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.80
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.93
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.031
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.031
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.031
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.030
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.010
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.004
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.225
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.209
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.221
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P5Y10M24D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	18572000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	65.27
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	2326000	shares
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	87.10
CY2022	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	6317000	shares
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	60.77
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	862000	shares
CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	73.11
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	13719000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	70.55
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y6M
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	554000000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	13199000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	70.09
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P6Y4M24D
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	539000000	usd
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	8730000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	65.24
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y4M24D
CY2022Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	399000000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	225000000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	106000000	usd
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	51000000	usd
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	30000000	usd
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	27000000	usd
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	25000000	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	384000000	usd
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	202000000	usd
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	89000000	usd
CY2022Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	813000000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y10M24D
CY2022Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	17200000000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	24900000000	usd
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	175000000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	158000000	usd
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	158000000	usd
CY2022	us-gaap	Investment Income Interest InvestmentIncomeInterest	157000000	usd
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	36000000	usd
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CY2021	us-gaap	Interest Expense InterestExpense	806000000	usd
CY2020	us-gaap	Interest Expense InterestExpense	831000000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-237000000	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-297000000	usd
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-145000000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-1419000000	usd
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CY2020	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	1338000000	usd
CY2022	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-279000000	usd
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CY2021	mrk	Other Nonoperating Income Expense Other OtherNonoperatingIncomeExpenseOther	256000000	usd
CY2020	mrk	Other Nonoperating Income Expense Other OtherNonoperatingIncomeExpenseOther	130000000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1501000000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1341000000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	890000000	usd
CY2022	us-gaap	Interest Paid InterestPaid	937000000	usd
CY2021	us-gaap	Interest Paid InterestPaid	779000000	usd
CY2020	us-gaap	Interest Paid InterestPaid	822000000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3453000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
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CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1231000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-1835000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.111
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-1446000000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.104
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-965000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.165
CY2022	mrk	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Foreign Derived Intangible Income Deduction Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeForeignDerivedIntangibleIncomeDeductionAmount	462000000	usd
CY2022	mrk	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Foreign Derived Intangible Income Deduction Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeForeignDerivedIntangibleIncomeDeductionPercent	0.028
CY2021	mrk	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Foreign Derived Intangible Income Deduction Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeForeignDerivedIntangibleIncomeDeductionAmount	-75000000	usd
CY2021	mrk	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Foreign Derived Intangible Income Deduction Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeForeignDerivedIntangibleIncomeDeductionPercent	-0.005
CY2020	mrk	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Foreign Derived Intangible Income Deduction Amount EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeForeignDerivedIntangibleIncomeDeductionAmount	349000000	usd
CY2020	mrk	Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income Foreign Derived Intangible Income Deduction Percent EffectiveIncomeTaxRateReconciliationGlobalIntangibleLowTaxedIncomeForeignDerivedIntangibleIncomeDeductionPercent	0.060
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-110000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.007
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2000000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	57000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.010
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	81000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.005
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	81000000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.006
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	108000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.018
CY2022	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-10000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	-0.001
CY2021	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-275000000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	-0.020
CY2020	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-13000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	-0.002
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	108000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.007
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	102000000	usd
CY2022	mrk	Effective Income Tax Rate Reconciliation Business Combination Four Percent EffectiveIncomeTaxRateReconciliationBusinessCombinationFourPercent	0
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.007
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	37000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.006
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	11000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0.001
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	61000000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0.004
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Restructuring Charges IncomeTaxReconciliationNondeductibleExpenseRestructuringCharges	105000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Restructuring Charges EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges	0.018
CY2022	mrk	Income Tax Rate Reconciliation Asset Acquisition IncomeTaxRateReconciliationAssetAcquisition	0	usd
CY2022	mrk	Effective Income Tax Rate Reconciliation Asset Acquisition Percent EffectiveIncomeTaxRateReconciliationAssetAcquisitionPercent	0
CY2021	mrk	Income Tax Rate Reconciliation Asset Acquisition IncomeTaxRateReconciliationAssetAcquisition	-9000000	usd
CY2021	mrk	Effective Income Tax Rate Reconciliation Asset Acquisition Percent EffectiveIncomeTaxRateReconciliationAssetAcquisitionPercent	-0.001
CY2020	mrk	Income Tax Rate Reconciliation Asset Acquisition IncomeTaxRateReconciliationAssetAcquisition	559000000	usd
CY2020	mrk	Effective Income Tax Rate Reconciliation Asset Acquisition Percent EffectiveIncomeTaxRateReconciliationAssetAcquisitionPercent	0.095
CY2022	mrk	Effective Income Tax Rate Reconciliation Business Combination Four EffectiveIncomeTaxRateReconciliationBusinessCombinationFour	0	usd
CY2021	mrk	Effective Income Tax Rate Reconciliation Business Combination Four EffectiveIncomeTaxRateReconciliationBusinessCombinationFour	356000000	usd
CY2021	mrk	Effective Income Tax Rate Reconciliation Business Combination Four Percent EffectiveIncomeTaxRateReconciliationBusinessCombinationFourPercent	0.026
CY2020	mrk	Effective Income Tax Rate Reconciliation Business Combination Four EffectiveIncomeTaxRateReconciliationBusinessCombinationFour	0	usd
CY2020	mrk	Effective Income Tax Rate Reconciliation Business Combination Four Percent EffectiveIncomeTaxRateReconciliationBusinessCombinationFourPercent	0
CY2022	mrk	Effective Income Tax Rate Reconciliation Business Combination Two EffectiveIncomeTaxRateReconciliationBusinessCombinationTwo	0	usd
CY2022	mrk	Effective Income Tax Rate Reconciliation Business Combination Two Percent EffectiveIncomeTaxRateReconciliationBusinessCombinationTwoPercent	0
CY2021	mrk	Effective Income Tax Rate Reconciliation Business Combination Two EffectiveIncomeTaxRateReconciliationBusinessCombinationTwo	0	usd
CY2021	mrk	Effective Income Tax Rate Reconciliation Business Combination Two Percent EffectiveIncomeTaxRateReconciliationBusinessCombinationTwoPercent	0
CY2020	mrk	Effective Income Tax Rate Reconciliation Business Combination Two EffectiveIncomeTaxRateReconciliationBusinessCombinationTwo	97000000	usd
CY2020	mrk	Effective Income Tax Rate Reconciliation Business Combination Two Percent EffectiveIncomeTaxRateReconciliationBusinessCombinationTwoPercent	0.017
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-80000000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-29000000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-9000000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1918000000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.117
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1521000000	usd
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.110
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1340000000	usd
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.229
CY2022Q4	us-gaap	Tax Cuts And Jobs Act Of2017 Transition Tax For Accumulated Foreign Earnings Liability TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsLiability	2200000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1011000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1854000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-3814000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	15433000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	12025000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	9677000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16444000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	13879000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5863000000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2265000000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	74000000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	893000000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1164000000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1273000000	usd
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	969000000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	57000000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-13000000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	44000000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3486000000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1334000000	usd
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1906000000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1510000000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	240000000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-605000000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	71000000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-77000000	usd
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	64000000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-129000000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	24000000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-25000000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1568000000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	187000000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-566000000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1918000000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1521000000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1340000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	0	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	2575000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	0	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3207000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	1341000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	274000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	43000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	423000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	119000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	370000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	0	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	657000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	0	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	589000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	0	usd
CY2022Q4	mrk	Deferred Tax Liabilities Equity Method Investment DeferredTaxLiabilitiesEquityMethodInvestment	92000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	0	usd
CY2021Q4	mrk	Deferred Tax Liabilities Equity Method Investment DeferredTaxLiabilitiesEquityMethodInvestment	335000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	372000000	usd
CY2022Q4	mrk	Deferred Tax Liabilities Pensions And Other Postretirement Benefit Plans DeferredTaxLiabilitiesPensionsAndOtherPostretirementBenefitPlans	284000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	487000000	usd
CY2021Q4	mrk	Deferred Tax Liabilities Pensions And Other Postretirement Benefit Plans DeferredTaxLiabilitiesPensionsAndOtherPostretirementBenefitPlans	338000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	335000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	301000000	usd
CY2022Q4	mrk	Deferred Tax Assets Unrecognized Tax Benefits DeferredTaxAssetsUnrecognizedTaxBenefits	91000000	usd
CY2021Q4	mrk	Deferred Tax Assets Unrecognized Tax Benefits DeferredTaxAssetsUnrecognizedTaxBenefits	75000000	usd
CY2022Q4	mrk	Deferred Tax Assets Operating Loss Carryforwards And Other Tax Credit Carryforwards DeferredTaxAssetsOperatingLossCarryforwardsAndOtherTaxCreditCarryforwards	912000000	usd
CY2021Q4	mrk	Deferred Tax Assets Operating Loss Carryforwards And Other Tax Credit Carryforwards DeferredTaxAssetsOperatingLossCarryforwardsAndOtherTaxCreditCarryforwards	867000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	511000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	267000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	434000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	180000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3605000000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4298000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	2557000000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5019000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	599000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	287000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	3006000000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4298000000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2270000000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5019000000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1292000000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2749000000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	1795000000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3441000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	349000000	usd
CY2022Q4	mrk	Deferredtaxassetscreditlosscarryforwardsand No Lcarryforwardsdomestic DeferredtaxassetscreditlosscarryforwardsandNOLcarryforwardsdomestic	563000000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	3200000000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	2400000000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	2700000000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	3239000000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	2412000000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	2740000000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	45000000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	21000000	usd
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	12000000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1529000000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1537000000	usd
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1225000000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	344000000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	306000000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	298000000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	48000000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	63000000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	110000000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	40000000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	230000000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4000000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	6000000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	46000000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	70000000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	40000000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	58000000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	22000000	usd
CY2022	mrk	Unrecognized Tax Benefits Decrease Resulting From Spinoff Transaction UnrecognizedTaxBenefitsDecreaseResultingFromSpinoffTransaction	0	usd
CY2021	mrk	Unrecognized Tax Benefits Decrease Resulting From Spinoff Transaction UnrecognizedTaxBenefitsDecreaseResultingFromSpinoffTransaction	43000000	usd
CY2020	mrk	Unrecognized Tax Benefits Decrease Resulting From Spinoff Transaction UnrecognizedTaxBenefitsDecreaseResultingFromSpinoffTransaction	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1835000000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1529000000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1537000000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1800000000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1800000000	usd
CY2022Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	31000000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	54000000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-37000000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	16000000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	256000000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	192000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	14519000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	12345000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	4519000000	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	704000000	usd
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2548000000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	14519000000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	14519000000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	13049000000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	13049000000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7067000000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7067000000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2532000000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2530000000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2530000000	shares
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	10000000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	8000000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	11000000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2542000000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2538000000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2541000000	shares
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	5.73
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	4.88
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.79
CY2022	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0.28
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	1.01
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.73
CY2022	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	446000000	usd
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.16
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.79
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	5.71
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	4.86
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.78
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.28
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	1.00
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.71
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.14
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.78
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2000000	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	9000000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5000000	shares
CY2020	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	-949000000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Before Reclassifications Tax OtherComprehensiveIncomeLossBeforeReclassificationsTax	-293000000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-656000000	usd
CY2020	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	-287000000	usd
CY2020	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	-72000000	usd
CY2020	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-215000000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-441000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	1766000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Tax OtherComprehensiveIncomeLossBeforeReclassificationsTax	526000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	1240000000	usd
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax	-658000000	usd
CY2021	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	-142000000	usd
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-516000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1756000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Reclassifications Before Tax OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax	170000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Reclassifications Tax OtherComprehensiveIncomeLossBeforeReclassificationsTax	150000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	20000000	usd
CY2022	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	87000000	usd
CY2022	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	359000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-339000000	usd
CY2022	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2022	us-gaap	Revenues Revenues	59283000000	usd
CY2021	us-gaap	Revenues Revenues	48704000000	usd
CY2020	us-gaap	Revenues Revenues	41518000000	usd
CY2022	mrk	Increase Decrease In Hedge Revenue IncreaseDecreaseInHedgeRevenue	810000000	usd
CY2021	mrk	Increase Decrease In Hedge Revenue IncreaseDecreaseInHedgeRevenue	-203000000	usd
CY2020	mrk	Increase Decrease In Hedge Revenue IncreaseDecreaseInHedgeRevenue	-19000000	usd
CY2022	us-gaap	Proceeds From Sale Of Intangible Assets ProceedsFromSaleOfIntangibleAssets	165000000	usd
CY2021	us-gaap	Proceeds From Sale Of Intangible Assets ProceedsFromSaleOfIntangibleAssets	218000000	usd
CY2020	us-gaap	Proceeds From Sale Of Intangible Assets ProceedsFromSaleOfIntangibleAssets	54000000	usd
CY2022	us-gaap	Revenues Revenues	59283000000	usd
CY2021	us-gaap	Revenues Revenues	48704000000	usd
CY2020	us-gaap	Revenues Revenues	41518000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	16444000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	13879000000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5863000000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	21422000000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	19279000000	usd
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	17000000000	usd
CY2022	dei	Auditor Name AuditorName	PricewaterhouseCoopers LLP
CY2022	dei	Auditor Location AuditorLocation	Florham Park, New Jersey
CY2022	dei	Auditor Firm AuditorFirmId	238

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$MRK
Merck & Co., Inc. Stock $mrk

2023 Q1 Form 10-K Financial Statement

#000162828023005061 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MRK Merck & Co., Inc. Stock $mrk

2023 Q1 Form 10-K Financial Statement

#000162828023005061 Filed on February 24, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MRK
Merck & Co., Inc. Stock $mrk