$GHC
Graham Holdings Co Stock $ghc

$ghc Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000010488921000030 Filed on May 05, 2021

Income Statement

Concept	2021 Q1	2020 Q1
Revenue	$712.5M	$732.3M
YoY Change	-2.7%	5.79%
Cost Of Revenue	$471.2M	$497.4M
YoY Change	-5.27%	4.23%
Gross Profit	$241.2M	$234.8M
YoY Change	2.73%	9.21%
Gross Profit Margin	33.85%	32.07%
Selling, General & Admin	$175.9M	$179.5M
YoY Change	-2.01%	20.96%
% of Gross Profit	72.93%	76.45%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$16.55M	$16.70M
YoY Change	-0.95%	-37.16%
% of Gross Profit	6.86%	7.11%
Operating Expenses	$206.4M	$210.3M
YoY Change	-1.85%	20.17%
Operating Profit	$33.84M	$8.085M
YoY Change	318.6%	-79.79%
Interest Expense	$8.448M	$7.678M
YoY Change	10.03%	3.41%
% of Operating Profit	24.96%	94.97%
Other Income/Expense, Net	$6.320M	$2.688M
YoY Change	135.12%	-90.84%
Pretax Income	$154.0M	-$79.29M
YoY Change	-294.27%	-172.54%
Income Tax	$41.40M	-$45.40M
% Of Pretax Income	26.88%
Net Earnings	$112.5M	-$33.25M
YoY Change	-438.25%	-140.67%
Net Earnings / Revenue	15.78%	-4.54%
Basic Earnings Per Share	$22.49	-$6.32
Diluted Earnings Per Share	$22.44	-$6.32
COMMON SHARES
Basic Shares Outstanding	4.967M shares	5.274M shares
Diluted Shares Outstanding	4.977M shares	5.274M shares

Balance Sheet

Concept	2021 Q1	2020 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.066B	$630.0M
YoY Change	69.16%	-9.85%
Cash & Equivalents	$350.1M	$178.6M
Short-Term Investments	$715.6M	$451.4M
Other Short-Term Assets	$1.427M	$11.78M
YoY Change	-87.89%	-84.72%
Inventory	$132.1M	$117.4M
Prepaid Expenses	$85.12M	$96.41M
Receivables	$495.4M	$485.2M
Other Receivables	$35.20M	$85.20M
Total Short-Term Assets	$1.837B	$1.449B
YoY Change	26.81%	-1.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$375.9M	$382.4M
YoY Change	-1.71%	19.72%
Goodwill	$1.485B	$1.362B
YoY Change	9.03%	1.67%
Intangibles
YoY Change
Long-Term Investments	$169.2M	$167.6M
YoY Change	0.95%	19.63%
Other Assets	$148.2M	$128.7M
YoY Change	15.19%	-0.48%
Total Long-Term Assets	$4.681B	$4.197B
YoY Change	11.54%	12.83%
TOTAL ASSETS
Total Short-Term Assets	$1.837B	$1.449B
Total Long-Term Assets	$4.681B	$4.197B
Total Assets	$6.518B	$5.646B
YoY Change	15.46%	8.63%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$492.6M	$433.7M
YoY Change	13.58%	2.68%
Accrued Expenses	$84.70M	$89.10M
YoY Change	-4.94%	8.13%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due	$4.238M	$78.58M
YoY Change	-94.61%	718.49%
Total Short-Term Liabilities	$927.7M	$937.4M
YoY Change	-1.03%	12.97%
LONG-TERM LIABILITIES
Long-Term Debt	$506.1M	$430.3M
YoY Change	17.61%	-13.98%
Other Long-Term Liabilities	$36.59M	$31.43M
YoY Change	16.42%	80.62%
Total Long-Term Liabilities	$542.7M	$461.7M
YoY Change	17.53%	-10.8%
TOTAL LIABILITIES
Total Short-Term Liabilities	$927.7M	$937.4M
Total Long-Term Liabilities	$542.7M	$461.7M
Total Liabilities	$2.646B	$2.427B
YoY Change	9.01%	10.64%
SHAREHOLDERS EQUITY
Retained Earnings	$6.902B	$6.486B
YoY Change	6.42%	2.9%
Common Stock	$20.00M	$20.00M
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$4.052B	$3.948B
YoY Change	2.62%	0.77%
Treasury Stock Shares
Shareholders Equity	$3.858B	$3.206B
YoY Change
Total Liabilities & Shareholders Equity	$6.518B	$5.646B
YoY Change	15.46%	8.63%

Cashflow Statement

Concept	2021 Q1	2020 Q1
OPERATING ACTIVITIES
Net Income	$112.5M	-$33.25M
YoY Change	-438.25%	-140.67%
Depreciation, Depletion And Amortization	$16.55M	$16.70M
YoY Change	-0.95%	-37.16%
Cash From Operating Activities	$24.00M	$12.40M
YoY Change	93.49%	-132.71%
INVESTING ACTIVITIES
Capital Expenditures	$13.11M	$25.24M
YoY Change	-48.04%	-10.68%
Acquisitions	$0.00	$6.011M
YoY Change	-100.0%	-92.82%
Other Investing Activities	-$4.000K	$0.00
YoY Change		-100.0%
Cash From Investing Activities	-$63.29M	$9.561M
YoY Change	-761.96%	-112.94%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$0.00	$33.61M
YoY Change	-100.0%
Debt Paid & Issued, Net	$1.034M	$847.0K
YoY Change	22.08%
Cash From Financing Activities	-$10.13M	-$26.69M
YoY Change	-62.04%	-172.06%
NET CHANGE
Cash From Operating Activities	$24.00M	$12.40M
Cash From Investing Activities	-$63.29M	$9.561M
Cash From Financing Activities	-$10.13M	-$26.69M
Net Change In Cash	-$50.44M	-$12.41M
YoY Change	306.57%	-83.0%
FREE CASH FLOW
Cash From Operating Activities	$24.00M	$12.40M
Capital Expenditures	$13.11M	$25.24M
Free Cash Flow	$10.89M	-$12.83M
YoY Change	-184.83%	-80.61%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q1	dei	Security12b Title Security12bTitle	Class B Common Stock, par value $1.00 per share
CY2021Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2021Q1	dei	Amendment Flag AmendmentFlag	false
CY2021Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000104889
CY2021Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021Q1	dei	Document Type DocumentType	10-Q
CY2021Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2021Q1	dei	Document Period End Date DocumentPeriodEndDate	2021-03-31
CY2021Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2021Q1	dei	Entity File Number EntityFileNumber	001-06714
CY2021Q1	dei	Entity Registrant Name EntityRegistrantName	GRAHAM HOLDINGS CO
CY2021Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	53-0182885
CY2021Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	1300 North 17th Street
CY2021Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Arlington
CY2021Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	VA
CY2021Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	22209
CY2021Q1	dei	City Area Code CityAreaCode	703
CY2021Q1	dei	Local Phone Number LocalPhoneNumber	345-6300
CY2021Q1	dei	Trading Symbol TradingSymbol	GHC
CY2021Q1	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2021Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021Q1	dei	Entity Shell Company EntityShellCompany	false
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	712455000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	732257000	USD
CY2021Q1	ghc	Selling Generaland Administrative Expenses SellingGeneralandAdministrativeExpenses	175861000	USD
CY2020Q1	ghc	Selling Generaland Administrative Expenses SellingGeneralandAdministrativeExpenses	177152000	USD
CY2021Q1	us-gaap	Depreciation Depreciation	16545000	USD
CY2020Q1	us-gaap	Depreciation Depreciation	16704000	USD
CY2021Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13937000	USD
CY2020Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14165000	USD
CY2021Q1	us-gaap	Asset Impairment Charges AssetImpairmentCharges	1047000	USD
CY2020Q1	us-gaap	Asset Impairment Charges AssetImpairmentCharges	16401000	USD
CY2021Q1	us-gaap	Costs And Expenses CostsAndExpenses	678611000	USD
CY2020Q1	us-gaap	Costs And Expenses CostsAndExpenses	724172000	USD
CY2021Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	33844000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	8085000	USD
CY2021Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13428000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1547000	USD
CY2021Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	890000	USD
CY2020Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	1151000	USD
CY2021Q1	us-gaap	Interest Expense InterestExpense	8448000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	7678000	USD
CY2021Q1	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-28787000	USD
CY2020Q1	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-18403000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	79214000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-100393000	USD
CY2021Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6320000	USD
CY2020Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2688000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	154035000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-79291000	USD
CY2021Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	41400000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-45400000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	112635000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-33891000	USD
CY2021Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	185000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-646000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	112450000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-33245000	USD
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	22.49
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-6.32
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4967000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5274000	shares
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	22.44
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.32
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4977000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5274000	shares
CY2021Q1	us-gaap	Profit Loss ProfitLoss	112635000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-33891000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-486000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-37376000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	792000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	671000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	2429000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-220000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	1637000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-891000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	621000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	-1578000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-1502000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-38063000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-299000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-120000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1203000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-37943000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	111432000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-71834000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	185000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-646000	USD
CY2021Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	111247000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-71188000	USD
CY2021Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	350135000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	413991000	USD
CY2021Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	22484000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	9063000	USD
CY2021Q1	ghc	Investments In Marketable Equity Securities And Other Investments InvestmentsInMarketableEquitySecuritiesAndOtherInvestments	715580000	USD
CY2020Q4	ghc	Investments In Marketable Equity Securities And Other Investments InvestmentsInMarketableEquitySecuritiesAndOtherInvestments	587582000	USD
CY2021Q1	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	515220000	USD
CY2020Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	537156000	USD
CY2021Q1	us-gaap	Inventory Net Of Allowances Customer Advances And Progress Billings InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings	132136000	USD
CY2020Q4	us-gaap	Inventory Net Of Allowances Customer Advances And Progress Billings InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings	120622000	USD
CY2021Q1	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	85119000	USD
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	75523000	USD
CY2021Q1	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	15339000	USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	29313000	USD
CY2021Q1	us-gaap	Other Assets Current OtherAssetsCurrent	1427000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	942000	USD
CY2021Q1	us-gaap	Assets Current AssetsCurrent	1837440000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1774192000	USD
CY2021Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	375862000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	378286000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	453193000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	462560000	USD
CY2021Q1	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	169203000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	155777000	USD
CY2021Q1	us-gaap	Goodwill Goodwill	1485137000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1484750000	USD
CY2021Q1	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	121050000	USD
CY2020Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	120437000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	190041000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	204646000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	1730625000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	1708305000	USD
CY2021Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	7651000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	8396000	USD
CY2021Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	148218000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	146770000	USD
CY2021Q1	us-gaap	Assets Assets	6518420000	USD
CY2020Q4	us-gaap	Assets Assets	6444119000	USD
CY2021Q1	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	492625000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	520236000	USD
CY2021Q1	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	331678000	USD
CY2020Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	331021000	USD
CY2021Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	6891000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	5140000	USD
CY2021Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	84749000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	86797000	USD
CY2021Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	4238000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	6452000	USD
CY2021Q1	us-gaap	Dividends Payable Current DividendsPayableCurrent	7553000	USD
CY2020Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	USD
CY2021Q1	us-gaap	Liabilities Current LiabilitiesCurrent	927734000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	949646000	USD
CY2021Q1	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	196558000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	201918000	USD
CY2021Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	36591000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	48768000	USD
CY2021Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	549418000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	521274000	USD
CY2021Q1	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount Noncurrent SharesSubjectToMandatoryRedemptionSettlementTermsAmountNoncurrent	10272000	USD
CY2020Q4	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Amount Noncurrent SharesSubjectToMandatoryRedemptionSettlementTermsAmountNoncurrent	9240000	USD
CY2021Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	419131000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	428849000	USD
CY2021Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	506091000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	506103000	USD
CY2021Q1	us-gaap	Liabilities Liabilities	2645795000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	2665798000	USD
CY2021Q1	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	7786000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	11928000	USD
CY2021Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2021Q1	us-gaap	Common Stock Value CommonStockValue	20000000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	20000000	USD
CY2021Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	385257000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	388159000	USD
CY2021Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6902166000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6804822000	USD
CY2021Q1	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	9268000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	9754000	USD
CY2021Q1	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-594093000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax	-595287000	USD
CY2021Q1	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-1250000	USD
CY2020Q4	us-gaap	Aoci Loss Cash Flow Hedge Cumulative Gain Loss After Tax AociLossCashFlowHedgeCumulativeGainLossAfterTax	-1727000	USD
CY2021Q1	us-gaap	Treasury Stock Value TreasuryStockValue	4051909000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	4056993000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	3857625000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	3759302000	USD
CY2021Q1	us-gaap	Minority Interest MinorityInterest	7214000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	7091000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3864839000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3766393000	USD
CY2021Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6518420000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6444119000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	112635000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-33891000	USD
CY2021Q1	ghc	Depreciation Depletion Amortization And Impairment DepreciationDepletionAmortizationAndImpairment	31529000	USD
CY2020Q1	ghc	Depreciation Depletion Amortization And Impairment DepreciationDepletionAmortizationAndImpairment	47270000	USD
CY2021Q1	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	18594000	USD
CY2020Q1	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	23749000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-24501000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-13784000	USD
CY2021Q1	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	81937000	USD
CY2020Q1	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-100393000	USD
CY2021Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	240000	USD
CY2020Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-2761000	USD
CY2021Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1126000	USD
CY2020Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2429000	USD
CY2021Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1485000	USD
CY2020Q1	us-gaap	Share Based Compensation ShareBasedCompensation	1568000	USD
CY2021Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	3000	USD
CY2020Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4290000	USD
CY2021Q1	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	11241000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-1547000	USD
CY2021Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	29311000	USD
CY2020Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-21550000	USD
CY2021Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-25196000	USD
CY2020Q1	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-100732000	USD
CY2021Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	11493000	USD
CY2020Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	8512000	USD
CY2021Q1	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-29965000	USD
CY2020Q1	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-97476000	USD
CY2021Q1	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-6655000	USD
CY2020Q1	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-12790000	USD
CY2021Q1	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	10860000	USD
CY2020Q1	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-27774000	USD
CY2021Q1	ghc	Increase Decrease In Lease Liabilitites IncreaseDecreaseInLeaseLiabilitites	-21119000	USD
CY2020Q1	ghc	Increase Decrease In Lease Liabilitites IncreaseDecreaseInLeaseLiabilitites	-22503000	USD
CY2021Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	20881000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	24980000	USD
CY2021Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1298000	USD
CY2020Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-496000	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	23999000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12403000	USD
CY2021Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	48036000	USD
CY2020Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2021Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13113000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	25235000	USD
CY2021Q1	ghc	Payments To Acquire Equity Method Cost Method Investments And Other Investments PaymentsToAcquireEquityMethodCostMethodInvestmentsAndOtherInvestments	2415000	USD
CY2020Q1	ghc	Payments To Acquire Equity Method Cost Method Investments And Other Investments PaymentsToAcquireEquityMethodCostMethodInvestmentsAndOtherInvestments	7427000	USD
CY2021Q1	ghc	Net Proceeds From Sale Of Businesses Property Plant And Equipment And Other Assets NetProceedsFromSaleOfBusinessesPropertyPlantAndEquipmentAndOtherAssets	270000	USD
CY2020Q1	ghc	Net Proceeds From Sale Of Businesses Property Plant And Equipment And Other Assets NetProceedsFromSaleOfBusinessesPropertyPlantAndEquipmentAndOtherAssets	218000	USD
CY2021Q1	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	USD
CY2020Q1	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	48016000	USD
CY2021Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020Q1	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	6011000	USD
CY2021Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-4000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-63290000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	9561000	USD
CY2021Q1	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	7553000	USD
CY2020Q1	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	7703000	USD
CY2020Q1	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	7703000	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	3508000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Redeemable Noncontrolling Interest PaymentsForRepurchaseOfRedeemableNoncontrollingInterest	0	USD
CY2021Q1	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	3212000	USD
CY2020Q1	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	9062000	USD
CY2021Q1	ghc	Proceeds From Payments Of Vehicle Floor Plan Payable Net ProceedsFromPaymentsOfVehicleFloorPlanPayableNet	2462000	USD
CY2020Q1	ghc	Proceeds From Payments Of Vehicle Floor Plan Payable Net ProceedsFromPaymentsOfVehicleFloorPlanPayableNet	2478000	USD
CY2021Q1	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-2223000	USD
CY2020Q1	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	0	USD
CY2021Q1	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	1340000	USD
CY2020Q1	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	2423000	USD
CY2021Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1034000	USD
CY2020Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	847000	USD
CY2021Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	33610000	USD
CY2021Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2020Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	5335000	USD
CY2021Q1	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	0	USD
CY2020Q1	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1023000	USD
CY2021Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-145000	USD
CY2020Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2021Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-10129000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-26685000	USD
CY2021Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1015000	USD
CY2020Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-7684000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-50435000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-12405000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	423054000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	214044000	USD
CY2021Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	372619000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	201639000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3766393000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	11928000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	112635000	USD
CY2021Q1	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	0	USD
CY2021Q1	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	761000	USD
CY2021Q1	ghc	Temporary Equity Changein Redemption Value TemporaryEquityChangeinRedemptionValue	-634000	USD
CY2021Q1	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	126000	USD
CY2021Q1	us-gaap	Dividends Common Stock DividendsCommonStock	15106000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-104000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1589000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1203000	USD
CY2021Q1	ghc	Equityeffectofredemptionofredeemablenoncontrollinginterest Equityeffectofredemptionofredeemablenoncontrollinginterest	0	USD
CY2021Q1	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	3508000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3864839000	USD
CY2021Q1	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	7786000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3326796000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	5655000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-33891000	USD
CY2020Q1	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Nonredeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsNonredeemable	0	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	126000	USD
CY2020Q1	us-gaap	Temporary Equity Net Income TemporaryEquityNetIncome	126000	USD
CY2020Q1	us-gaap	Dividends Common Stock DividendsCommonStock	15289000	USD
CY2020Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	33610000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	5335000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1568000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-37943000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3212840000	USD
CY2020Q1	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	5781000	USD
CY2021Q1	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:110%">Use of Estimates in the Preparation of the Condensed Consolidated Financial Statements</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:110%"> – The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and judgments that affect the amounts reported herein. Management bases its estimates and assumptions on historical experience and on various other factors that are believed to be reasonable under the circumstances. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be affected by changes in those estimates.</span>
CY2020	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	3	business
CY2020	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	96800000	USD
CY2020Q4	us-gaap	Business Acquisition Purchase Price Allocation Goodwill Expected Tax Deductible Amount BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount	3200000	USD
CY2020Q1	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	738331000	USD
CY2020Q1	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	-40396000	USD
CY2021Q1	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	175200000	USD
CY2020Q4	us-gaap	Money Market Funds At Carrying Value MoneyMarketFundsAtCarryingValue	268800000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	280883000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	232847000	USD
CY2021Q1	ghc	Equity Securities Fvni Accumulated Gross Unrealized Gain EquitySecuritiesFVNIAccumulatedGrossUnrealizedGain	419469000	USD
CY2020Q4	ghc	Equity Securities Fvni Accumulated Gross Unrealized Gain EquitySecuritiesFVNIAccumulatedGrossUnrealizedGain	340255000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	700352000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	573102000	USD
CY2021Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	48000000.0	USD
CY2020Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2021Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	0	USD
CY2020Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	2000000.0	USD
CY2020Q1	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	48000000.0	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	79214000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-100393000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	-8774000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	79214000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-91619000	USD
CY2021Q1	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	39400000	USD
CY2020Q4	us-gaap	Retained Earnings Undistributed Earnings From Equity Method Investees RetainedEarningsUndistributedEarningsFromEquityMethodInvestees	26100000	USD
CY2020Q1	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	3600000	USD
CY2020Q1	ghc	Number Of Equity Method Investments Impaired NumberOfEquityMethodInvestmentsImpaired	2	investment
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	38600000	USD
CY2020Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	35700000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	2700000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	2600000	USD
CY2021Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	21126000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	21494000	USD
CY2021Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	495443000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	519577000	USD
CY2021Q1	us-gaap	Other Receivables OtherReceivables	19777000	USD
CY2020Q4	us-gaap	Other Receivables OtherReceivables	17579000	USD
CY2021Q1	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	515220000	USD
CY2020Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	537156000	USD
CY2021Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1100000	USD
CY2020Q1	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2400000	USD
CY2021Q1	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	46177000	USD
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	45382000	USD
CY2021Q1	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	14534000	USD
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	10402000	USD
CY2021Q1	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	71254000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	64061000	USD
CY2021Q1	us-gaap	Inventory For Long Term Contracts Or Programs InventoryForLongTermContractsOrPrograms	171000	USD
CY2020Q4	us-gaap	Inventory For Long Term Contracts Or Programs InventoryForLongTermContractsOrPrograms	777000	USD
CY2021Q1	us-gaap	Inventory Net Of Allowances Customer Advances And Progress Billings InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings	132136000	USD
CY2020Q4	us-gaap	Inventory Net Of Allowances Customer Advances And Progress Billings InventoryNetOfAllowancesCustomerAdvancesAndProgressBillings	120622000	USD
CY2021Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13900000	USD
CY2020Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	14200000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	38000000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	46000000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	38000000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	27000000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	21000000	USD
CY2021Q1	ghc	Finite Lived Intangible Asset Expected Amortization After Year Four FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour	20000000	USD
CY2020Q4	us-gaap	Goodwill Gross GoodwillGross	1838080000	USD
CY2020Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	353330000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1484750000	USD
CY2021Q1	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	387000	USD
CY2021Q1	us-gaap	Goodwill Gross GoodwillGross	1838467000	USD
CY2021Q1	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	353330000	USD
CY2021Q1	us-gaap	Goodwill Goodwill	1485137000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	480913000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	290872000	USD
CY2021Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	190041000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	481950000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	277304000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	204646000	USD
CY2021Q1	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	121050000	USD
CY2020Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	120437000	USD
CY2021Q1	us-gaap	Other Long Term Debt OtherLongTermDebt	3435000	USD
CY2020Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	3520000	USD
CY2021Q1	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	510329000	USD
CY2020Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	512555000	USD
CY2021Q1	us-gaap	Long Term Debt Current LongTermDebtCurrent	4238000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	6452000	USD
CY2021Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	506091000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	506103000	USD
CY2021Q1	ghc	Average Outstanding Debt Amount AverageOutstandingDebtAmount	512100000	USD
CY2020Q1	ghc	Average Outstanding Debt Amount AverageOutstandingDebtAmount	511400000	USD
CY2021Q1	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.050
CY2020Q1	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.051
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-7600000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-6500000	USD
CY2021Q1	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	1000000.0	USD
CY2020Q1	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	16400000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	2700000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	2600000	USD
CY2020Q1	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	3600000	USD
CY2020Q1	ghc	Number Of Equity Method Investments Impaired NumberOfEquityMethodInvestmentsImpaired	2	investment
CY2021Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.269
CY2020Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.573
CY2021Q1	us-gaap	Deferred Revenue DeferredRevenue	336440000	USD
CY2020Q4	us-gaap	Deferred Revenue DeferredRevenue	343322000	USD
CY2021Q1	ghc	Deferred Revenue Period Increase Decrease Percentage DeferredRevenuePeriodIncreaseDecreasePercentage	-0.02
CY2021Q1	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	145100000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	24363000	USD
CY2021Q1	ghc	Contract Costs Capitalized Duringthe Period ContractCostsCapitalizedDuringthePeriod	11833000	USD
CY2021Q1	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	-13298000	USD
CY2021Q1	ghc	Changein Capitalized Contract Cost Other ChangeinCapitalizedContractCostOther	-95000	USD
CY2021Q1	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	22803000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	112450000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-33245000	USD
CY2021Q1	ghc	Dividends Paid Common Stock And Sharebased Compensation Cash DividendsPaidCommonStockAndSharebasedCompensationCash	15106000	USD
CY2020Q1	ghc	Dividends Paid Common Stock And Sharebased Compensation Cash DividendsPaidCommonStockAndSharebasedCompensationCash	15289000	USD
CY2021Q1	us-gaap	Undistributed Earnings UndistributedEarnings	97344000	USD
CY2020Q1	us-gaap	Undistributed Earnings UndistributedEarnings	-48534000	USD
CY2021Q1	ghc	Percentage Of Undistributed Earnings Allocated To Common Stockholders PercentageOfUndistributedEarningsAllocatedToCommonStockholders	0.9933
CY2020Q1	ghc	Percentage Of Undistributed Earnings Allocated To Common Stockholders PercentageOfUndistributedEarningsAllocatedToCommonStockholders	1.0000
CY2021Q1	ghc	Undistributed Earnings Allocated To Common Stockholders UndistributedEarningsAllocatedToCommonStockholders	96693000	USD
CY2020Q1	ghc	Undistributed Earnings Allocated To Common Stockholders UndistributedEarningsAllocatedToCommonStockholders	-48534000	USD
CY2021Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15005000	USD
CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	15205000	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	111698000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-33329000	USD
CY2021Q1	ghc	Additional Undistributed Earnings Due To Dilutive Stock Options AdditionalUndistributedEarningsDueToDilutiveStockOptions	1000	USD
CY2020Q1	ghc	Additional Undistributed Earnings Due To Dilutive Stock Options AdditionalUndistributedEarningsDueToDilutiveStockOptions	0	USD
CY2021Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	111699000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-33329000	USD
CY2021Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	4967000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5274000	shares
CY2021Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	4977000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5274000	shares
CY2021Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	22.49
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-6.32
CY2021Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	22.44
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.32
CY2021Q1	ghc	Antidilutive Restricted Stock AntidilutiveRestrictedStock	9000	shares
CY2020Q1	ghc	Antidilutive Restricted Stock AntidilutiveRestrictedStock	12000	shares
CY2021Q1	ghc	Antidilutive Options AntidilutiveOptions	0	shares
CY2020Q1	ghc	Antidilutive Options AntidilutiveOptions	27000	shares
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.02
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.90
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	2723000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	0	USD
CY2021Q1	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	802000	USD
CY2020Q1	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	107000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	94000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	518000	USD
CY2021Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	3000	USD
CY2020Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4290000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	0	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	2577000	USD
CY2021Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2020Q1	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-103000	USD
CY2021Q1	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	2698000	USD
CY2020Q1	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	453000	USD
CY2021Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6320000	USD
CY2020Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2688000	USD
CY2021Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	2700000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	2600000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-1502000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-299000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1203000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-38063000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-120000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-37943000	USD
CY2021Q1	us-gaap	Loss Contingency Pending Claims Number LossContingencyPendingClaimsNumber	0	claim
CY2021Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	6	segment
CY2021Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	712455000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	732257000	USD
CY2021Q1	ghc	Operating Income Before Amortization Of Intangible Assets And Impairment Of Goodwill And Other Long Lived Assets OperatingIncomeBeforeAmortizationOfIntangibleAssetsAndImpairmentOfGoodwillAndOtherLongLivedAssets	48828000	USD
CY2020Q1	ghc	Operating Income Before Amortization Of Intangible Assets And Impairment Of Goodwill And Other Long Lived Assets OperatingIncomeBeforeAmortizationOfIntangibleAssetsAndImpairmentOfGoodwillAndOtherLongLivedAssets	38651000	USD
CY2021Q1	ghc	Amortization Of Intangible Assets And Impairment Of Goodwill And Other Long Lived Assets AmortizationOfIntangibleAssetsAndImpairmentOfGoodwillAndOtherLongLivedAssets	14984000	USD
CY2020Q1	ghc	Amortization Of Intangible Assets And Impairment Of Goodwill And Other Long Lived Assets AmortizationOfIntangibleAssetsAndImpairmentOfGoodwillAndOtherLongLivedAssets	30566000	USD
CY2021Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	33844000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	8085000	USD
CY2021Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13428000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1547000	USD
CY2021Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-7558000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-6527000	USD
CY2021Q1	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-28787000	USD
CY2020Q1	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-18403000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	79214000	USD
CY2020Q1	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-100393000	USD
CY2021Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6320000	USD
CY2020Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2688000	USD
CY2021Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	154035000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-79291000	USD
CY2021Q1	us-gaap	Depreciation Depreciation	16545000	USD
CY2020Q1	us-gaap	Depreciation Depreciation	16704000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	5602000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	5783000	USD
CY2021Q1	ghc	Identifiable Assets IdentifiableAssets	3918240000	USD
CY2020Q4	ghc	Identifiable Assets IdentifiableAssets	4006935000	USD
CY2021Q1	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	700352000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	573102000	USD
CY2021Q1	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	169203000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	155777000	USD
CY2021Q1	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	1730625000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	1708305000	USD
CY2021Q1	us-gaap	Assets Assets	6518420000	USD
CY2020Q4	us-gaap	Assets Assets	6444119000	USD

Files In Submission

Name	View Source	Status
0000104889-21-000030-index-headers.html	Edgar Link	pending
0000104889-21-000030-index.html	Edgar Link	pending
0000104889-21-000030.txt	Edgar Link	pending
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$GHC
Graham Holdings Co Stock $ghc

2021 Q1 Form 10-Q Financial Statement

#000010488921000030 Filed on May 05, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GHC Graham Holdings Co Stock $ghc

2021 Q1 Form 10-Q Financial Statement

#000010488921000030 Filed on May 05, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$GHC
Graham Holdings Co Stock $ghc