$KOS
Kosmos Energy Ltd. Stock $kos

$kos Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000150999121000031 Filed on February 23, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$274.2M	$449.7M	$357.0M
YoY Change	-39.03%	49.2%	47.03%
Cost Of Revenue	$103.9M	$136.3M	$95.50M
YoY Change	-23.77%	86.46%	73.32%
Gross Profit	$170.3M	$313.4M	$261.5M
YoY Change	-45.66%	37.22%	39.24%
Gross Profit Margin	62.11%	69.69%	73.24%
Selling, General & Admin	$14.80M	$21.30M	$24.70M
YoY Change	-30.52%	-38.26%	-5.0%
% of Gross Profit	8.69%	6.8%	9.45%
Research & Development	$10.30M	$97.90M	$22.80M
YoY Change	-89.48%	79.3%	-84.62%
% of Gross Profit	6.05%	31.24%	8.72%
Depreciation & Amortization	$162.1M	$149.9M	$149.0M
YoY Change	8.14%	21.38%	80.83%
% of Gross Profit	95.18%	47.83%	56.98%
Operating Expenses	$188.6M	$261.0M	$218.5M
YoY Change	-27.74%	32.35%	-13.81%
Operating Profit	-$18.30M	$52.40M	$43.00M
YoY Change	-134.92%	67.95%	-165.45%
Interest Expense	-$78.20M	-$65.20M	-$3.400M
YoY Change	19.94%	-126.3%	-93.93%
% of Operating Profit		-124.43%	-7.91%
Other Income/Expense, Net	$0.00	$0.00	-$11.47M
YoY Change		-100.0%	-189.58%
Pretax Income	-$16.30M	-$2.300M	$39.54M
YoY Change	608.7%	-100.8%	-134.47%
Income Tax	-$24.20M	$33.50M	$23.47M
% Of Pretax Income			59.37%
Net Earnings	$7.956M	-$35.77M	$16.07M
YoY Change	-122.24%	-119.28%	-112.74%
Net Earnings / Revenue	2.9%	-7.95%	4.5%
Basic Earnings Per Share	$0.02	-$0.09	$0.04
Diluted Earnings Per Share	$0.02	-$0.09	$0.04
COMMON SHARES
Basic Shares Outstanding	405.5M shares	401.5M shares	401.5M shares
Diluted Shares Outstanding			411.0M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$149.0M	$224.5M	$203.6M
YoY Change	-33.63%	29.39%	5.71%
Cash & Equivalents	$149.0M	$224.5M	$203.6M
Short-Term Investments
Other Short-Term Assets	$43.50M	$53.40M	$77.10M
YoY Change	-18.54%	-52.02%	-27.06%
Inventory	$129.0M	$114.4M	$140.2M
Prepaid Expenses
Receivables	$44.49M	$64.14M	$54.61M
Other Receivables	$8.320M	$28.73M	$20.02M
Total Short-Term Assets	$400.3M	$566.6M	$550.0M
YoY Change	-29.35%	11.15%	-14.16%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.321B	$3.642B	$3.799B
YoY Change	-8.82%	5.28%	8.25%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$1.000M	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Other Assets	$125.6M	$86.00M	$88.20M
YoY Change	46.05%	63.5%	16.05%
Total Long-Term Assets	$3.467B	$3.751B	$3.918B
YoY Change	-7.56%	4.81%	6.22%
TOTAL ASSETS
Total Short-Term Assets	$400.3M	$566.6M	$550.0M
Total Long-Term Assets	$3.467B	$3.751B	$3.918B
Total Assets	$3.868B	$4.317B	$4.468B
YoY Change	-10.41%	5.6%	3.21%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$221.4M	$149.5M	$171.5M
YoY Change	48.13%	-15.33%	11.42%
Accrued Expenses	$203.3M	$380.7M	$292.4M
YoY Change	-46.61%	94.64%	11.48%
Deferred Revenue	$15.08M	$32.48M	$33.72M
YoY Change	-53.58%	33.24%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$7.500M	$0.00
YoY Change
Total Short-Term Liabilities	$460.2M	$539.1M	$472.4M
YoY Change	-14.64%	40.28%	-24.83%
LONG-TERM LIABILITIES
Long-Term Debt	$2.104B	$2.008B	$2.106B
YoY Change	4.77%	-5.3%	0.56%
Other Long-Term Liabilities	$37.46M	$33.14M	$32.62M
YoY Change	13.02%	261.8%	251.61%
Total Long-Term Liabilities	$2.967B	$2.936B	$3.105B
YoY Change	1.05%	6.3%	12.25%
TOTAL LIABILITIES
Total Short-Term Liabilities	$460.2M	$539.1M	$472.4M
Total Long-Term Liabilities	$2.967B	$2.936B	$3.105B
Total Liabilities	$3.427B	$3.476B	$3.577B
YoY Change	-1.38%	10.45%	5.38%
SHAREHOLDERS EQUITY
Retained Earnings	-$1.635B	-$1.223B	-$1.187B
YoY Change	33.65%	4.78%	-12.24%
Common Stock	$2.312B	$2.302B	$2.315B
YoY Change	0.44%	-1.88%	-0.91%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$237.0M	$237.0M	$237.0M
YoY Change	0.0%	0.0%	386.6%
Treasury Stock Shares	44.26M shares	44.26M shares	44.26M shares
Shareholders Equity	$440.2M	$841.7M	$891.0M
YoY Change
Total Liabilities & Shareholders Equity	$3.868B	$4.317B	$4.468B
YoY Change	-10.41%	5.6%	3.21%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$7.956M	-$35.77M	$16.07M
YoY Change	-122.24%	-119.28%	-112.74%
Depreciation, Depletion And Amortization	$162.1M	$149.9M	$149.0M
YoY Change	8.14%	21.38%	80.83%
Cash From Operating Activities	$175.4M	$227.9M	$177.9M
YoY Change	-23.04%	33.82%	98.11%
INVESTING ACTIVITIES
Capital Expenditures	-$162.3M	-$103.1M	-$90.40M
YoY Change	57.42%	49.64%	-91.13%
Acquisitions
YoY Change
Other Investing Activities	$85.90M	$7.700M	-$13.60M
YoY Change	1015.58%	-81.71%	-117.82%
Cash From Investing Activities	-$76.50M	-$95.40M	-$104.0M
YoY Change	-19.81%	255.97%	-88.97%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-251.4M	-118.2M	-43.60M
YoY Change	112.69%	-28.49%	-104.77%
NET CHANGE
Cash From Operating Activities	175.4M	227.9M	177.9M
Cash From Investing Activities	-76.50M	-95.40M	-104.0M
Cash From Financing Activities	-251.4M	-118.2M	-43.60M
Net Change In Cash	-152.5M	14.30M	30.30M
YoY Change	-1166.43%	-165.6%	-50.33%
FREE CASH FLOW
Cash From Operating Activities	$175.4M	$227.9M	$177.9M
Capital Expenditures	-$162.3M	-$103.1M	-$90.40M
Free Cash Flow	$337.7M	$331.0M	$268.3M
YoY Change	2.02%	38.38%	-75.8%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001509991
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2020Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssets
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CY2019Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
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CY2019Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:AccruedLiabilitiesCurrent
CY2020	dei	Document Type DocumentType	10-K
CY2018	kos	Effective Income Tax Rate Reconciliation Nondeductible Expense Insurance Premiums EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInsurancePremiums	0	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5209000	USD
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-35167
CY2020	dei	Entity Registrant Name EntityRegistrantName	Kosmos Energy Ltd.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0686001
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	8176 Park Lane
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Dallas,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	75231
CY2020	dei	City Area Code CityAreaCode	214
CY2020	dei	Local Phone Number LocalPhoneNumber	445 9600
CY2020	dei	Security12b Title Security12bTitle	Common Stock $0.01 par value
CY2020	dei	Trading Symbol TradingSymbol	KOS
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
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CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-37802000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-24648000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6501000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	1312993000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	1484792000	USD
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	953229000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-416795000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25117000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-50860000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5209000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80894000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43131000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-411586000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-55777000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-93991000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.02
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.14
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.23
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.1808
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.02
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.14
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.23
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	405212000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	401368000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	404585000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	405212000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	401368000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	404585000	shares
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	897112000	USD
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	307944000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	36464000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018	kos	Repurchase Of Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Used To Cover Employee Taxes And Treasury Stock Value Acquired RepurchaseOfShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUsedToCoverEmployeeTaxesAndTreasuryStockValueAcquired	206051000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-93991000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	941478000	USD
CY2019	us-gaap	Dividends Dividends	74813000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	32797000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2019	kos	Repurchase Of Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Used To Cover Employee Taxes And Treasury Stock Value Acquired RepurchaseOfShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUsedToCoverEmployeeTaxesAndTreasuryStockValueAcquired	1983000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-55777000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	841702000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0452
CY2020	us-gaap	Dividends Dividends	18576000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	33561000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2020	kos	Repurchase Of Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Used To Cover Employee Taxes And Treasury Stock Value Acquired RepurchaseOfShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUsedToCoverEmployeeTaxesAndTreasuryStockValueAcquired	4947000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-411586000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	440154000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-411586000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-55777000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-93991000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	495209000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-90370000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	573118000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	339214000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-42587000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9145000	USD
CY2020	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	23157000	USD
CY2019	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	87813000	USD
CY2018	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	123199000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	153959000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-22800000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-67436000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	29960000	USD
CY2020	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	-2700000	USD
CY2019	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	-36300000	USD
CY2018	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	-137100000	USD
CY2020	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	-10944000	USD
CY2019	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	-31458000	USD
CY2018	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	-137942000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	32706000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	32370000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	35230000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	92163000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	10528000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	7666000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2902000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-24794000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4324000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-15922000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-9069000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2820000	USD
CY2020	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-92093000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	29735000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-175954000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	23167000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	28970000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-8848000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-7882000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-34586000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	18731000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	71947000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-83921000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7440000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-141985000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	129723000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-157393000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	196145000	USD
CY2020	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	65112000	USD
CY2019	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	26918000	USD
CY2018	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	628150000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	260491000	USD
CY2020	us-gaap	Payments To Acquire Oil And Gas Equipment PaymentsToAcquireOilAndGasEquipment	377491000	USD
CY2019	us-gaap	Payments To Acquire Oil And Gas Equipment PaymentsToAcquireOilAndGasEquipment	340217000	USD
CY2018	us-gaap	Payments To Acquire Oil And Gas Equipment PaymentsToAcquireOilAndGasEquipment	213806000	USD
CY2020	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2102000	USD
CY2019	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	11796000	USD
CY2018	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	7935000	USD
CY2020	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	0	USD
CY2019	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	0	USD
CY2018	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	961764000	USD
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2018	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	184664000	USD
CY2020	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	99118000	USD
CY2019	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	15000000	USD
CY2018	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	13703000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-345587000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-363931000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-985138000	USD
CY2020	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	300000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	175000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	1175000000	USD
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	250000000	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	425000000	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	325000000	USD
CY2020	kos	Proceeds From Advances Under Production Prepayment Agreement ProceedsFromAdvancesUnderProductionPrepaymentAgreement	50000000	USD
CY2019	kos	Proceeds From Advances Under Production Prepayment Agreement ProceedsFromAdvancesUnderProductionPrepaymentAgreement	0	USD
CY2018	kos	Proceeds From Advances Under Production Prepayment Agreement ProceedsFromAdvancesUnderProductionPrepaymentAgreement	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	641875000	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2020	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2019	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	535338000	USD
CY2018	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2020	kos	Payments For Repurchase Of Common Stock Used To Cover Employee Taxes PaymentsForRepurchaseOfCommonStockUsedToCoverEmployeeTaxes	4947000	USD
CY2019	kos	Payments For Repurchase Of Common Stock Used To Cover Employee Taxes PaymentsForRepurchaseOfCommonStockUsedToCoverEmployeeTaxes	1983000	USD
CY2018	kos	Payments For Repurchase Of Common Stock Used To Cover Employee Taxes PaymentsForRepurchaseOfCommonStockUsedToCoverEmployeeTaxes	206051000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	19271000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	72599000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	5922000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2444000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	38672000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	69860000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-220489000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	605277000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-79582000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	43730000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-119370000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	229346000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	185616000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	304986000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	149764000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	229346000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	185616000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	103674000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	99928000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	83831000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	104061000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	43909000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	45984000	USD
CY2020	kos	Production Prepayment Agreement Exchanged For Term Loan ProductionPrepaymentAgreementExchangedForTermLoan	50000000	USD
CY2019	kos	Production Prepayment Agreement Exchanged For Term Loan ProductionPrepaymentAgreementExchangedForTermLoan	0	USD
CY2018	kos	Production Prepayment Agreement Exchanged For Term Loan ProductionPrepaymentAgreementExchangedForTermLoan	0	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	307944000	USD
CY2020	us-gaap	Nature Of Operations NatureOfOperations	Organization<div style="margin-bottom:9pt;text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Kosmos Energy Ltd. was originally incorporated pursuant to the laws of Bermuda in January 2011 to become a holding company for Kosmos Energy Holdings. Kosmos Energy Ltd. changed its jurisdiction of incorporation from Bermuda to the State of Delaware in December 2018 and transferred all of our equity interests in Kosmos Energy Holdings to a new, wholly-owned subsidiary, Kosmos Energy Delaware Holdings, LLC, a Delaware limited liability company. As a holding company, Kosmos Energy Ltd.’s management operations are conducted through a wholly-owned subsidiary, Kosmos Energy, LLC. The terms “Kosmos,” the “Company,” “we,” “us,” “our,” “ours,” and similar terms refer to Kosmos Energy Ltd. and its wholly-owned subsidiaries, unless the context indicates otherwise.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Kosmos is a full-cycle deepwater independent oil and gas exploration and production company focused along the Atlantic Margins. Our key assets include production offshore Ghana, Equatorial Guinea and the U.S. Gulf of Mexico, as well as a world-class gas development offshore Mauritania and Senegal. We also maintain a sustainable proven basin exploration program in Equatorial Guinea, Ghana and the U.S. Gulf of Mexico. Kosmos is listed on the NYSE and LSE and is traded under the ticker symbol KOS. </span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Kosmos is engaged in a single line of business, which is the exploration, development, and production of oil and natural gas. Substantially all of our long-lived assets and all of our product sales are related to operations in four geographic areas: Ghana, Equatorial Guinea, Mauritania/Senegal and the U.S. Gulf of Mexico.</span></div>
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and the disclosures of contingent assets and liabilities. These estimates could change materially if different information or assumptions were used. We base our assumptions and estimates on historical experience and other sources that we believe to be reasonable at the time. Actual results could differ from these estimates.</span></div>
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Reclassifications</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain prior period amounts have been reclassified to conform with the current year presentation. Such reclassifications had no significant impact on our reported net loss, current assets, total assets, current liabilities, total liabilities, shareholders’ equity or cash flows, except as disclosed related to the adoption of recent accounting pronouncements.</span></div>
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	149027000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	224502000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	173515000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	195000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	4302000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	4527000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	542000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	542000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	7574000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	149764000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	229346000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	185616000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5700000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2700000	USD
CY2020Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	127500000	USD
CY2019Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	112300000	USD
CY2020Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	1500000	USD
CY2019Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	2100000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	8600000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	4600000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	300000	USD
CY2019	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	542900000	USD
CY2020Q4	kos	Oil And Gas Imbalance Asset Liability OilAndGasImbalanceAssetLiability	0	USD
CY2019Q4	kos	Oil And Gas Imbalance Asset Liability OilAndGasImbalanceAssetLiability	0	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	16500000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	11500000	USD
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Concentration of Credit RiskOur revenue can be materially affected by current economic conditions and the price of oil. However, based on the current demand for crude oil and the fact that alternative purchasers are readily available, we believe that the loss of our marketing agent and/or any of the purchasers identified by our marketing agent would not have a long‑term material adverse effect on our financial position or results of international operations. For our U.S. Gulf of Mexico operations, crude oil and natural gas are transported to customers using third-party pipelines.
CY2018Q4	kos	Number Of Companies In Alliance NumberOfCompaniesInAlliance	2	company
CY2020Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	5369737000	USD
CY2019Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	4904648000	USD
CY2020Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	495390000	USD
CY2019Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	814065000	USD
CY2020Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	5865127000	USD
CY2019Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	5718713000	USD
CY2020Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	2554851000	USD
CY2019Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	2093962000	USD
CY2020Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3310276000	USD
CY2019Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3624751000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	59949000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	61598000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	49312000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	44017000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	10637000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	17581000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3320913000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3642332000	USD
CY2020	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	460900000	USD
CY2018	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	316300000	USD
CY2020	us-gaap	Depreciation Depreciation	5500000	USD
CY2019	us-gaap	Depreciation Depreciation	6900000	USD
CY2018	us-gaap	Depreciation Depreciation	4600000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	154000000.0	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	445790000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	367665000	USD
CY2017Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	410113000	USD
CY2020	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	4001000	USD
CY2019	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	78125000	USD
CY2018	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	10518000	USD
CY2020	kos	Capitalized Exploratory Well Cost Additions Associated With Acquisition CapitalizedExploratoryWellCostAdditionsAssociatedWithAcquisition	0	USD
CY2019	kos	Capitalized Exploratory Well Cost Additions Associated With Acquisition CapitalizedExploratoryWellCostAdditionsAssociatedWithAcquisition	0	USD
CY2018	kos	Capitalized Exploratory Well Cost Additions Associated With Acquisition CapitalizedExploratoryWellCostAdditionsAssociatedWithAcquisition	26224000	USD
CY2020	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	263502000	USD
CY2019	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	0	USD
CY2018	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	26224000	USD
CY2020	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	0	USD
CY2019	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	0	USD
CY2018	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	52966000	USD
CY2020Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	186289000	USD
CY2019Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	445790000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	367665000	USD
CY2020Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	0	USD
CY2019Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	29121000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	0	USD
CY2019Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	445790000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	367665000	USD
CY2020Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	3	project
CY2020Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears	28692000	USD
CY2019Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears	78245000	USD
CY2018Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears	299253000	USD
CY2020Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYears	157597000	USD
CY2019Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYears	338424000	USD
CY2018Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYears	68412000	USD
CY2020Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	186289000	USD
CY2019Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	3	project
CY2018Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	3	project
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	5869000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	5480000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	22240000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	13705000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	15874000	USD
CY2020	us-gaap	Lease Cost LeaseCost	19574000	USD
CY2019	us-gaap	Lease Cost LeaseCost	21354000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	19799000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	20008000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1405000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1139000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	22771000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y4M24D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y9M18D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.098
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.098
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	5225000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	5082000	USD
CY2020	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	12586000	USD
CY2019	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	13855000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3307000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4216000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4287000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4358000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4429000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	15470000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	36067000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	11891000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	24176000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2150000000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2050000000	USD
CY2020Q4	kos	Debt Instrument Unamortized Issuance Costs And Discounts DebtInstrumentUnamortizedIssuanceCostsAndDiscounts	38569000	USD
CY2019Q4	kos	Debt Instrument Unamortized Issuance Costs And Discounts DebtInstrumentUnamortizedIssuanceCostsAndDiscounts	41937000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	2111431000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2008063000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	7500000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2103931000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2008063000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2150000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	7500000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	258571000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	458571000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	458572000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	316786000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	650000000	USD
CY2020	us-gaap	Interest Costs Incurred InterestCostsIncurred	119857000	USD
CY2019	us-gaap	Interest Costs Incurred InterestCostsIncurred	145507000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	114134000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	9347000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	9257000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	9379000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2902000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-24794000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4324000	USD
CY2020	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	25013000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	28077000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	28331000	USD
CY2020	kos	Deferred Interest DeferredInterest	2402000	USD
CY2019	kos	Deferred Interest DeferredInterest	1919000	USD
CY2018	kos	Deferred Interest DeferredInterest	-1138000	USD
CY2020	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	4773000	USD
CY2019	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3692000	USD
CY2018	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3455000	USD
CY2020	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	5072000	USD
CY2019	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	5366000	USD
CY2018	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	6263000	USD
CY2020	kos	Interest Expense Income Net InterestExpenseIncomeNet	109794000	USD
CY2019	kos	Interest Expense Income Net InterestExpenseIncomeNet	155074000	USD
CY2018	kos	Interest Expense Income Net InterestExpenseIncomeNet	101176000	USD
CY2020	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-22800000	USD
CY2019	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-70724000	USD
CY2020Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2020Q4	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	3200000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	154000000.0	USD
CY2018	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	29960000	USD
CY2020Q1	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	150800000	USD
CY2020Q2	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	235053000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	151953000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	3436000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	11218000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2782000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	7156000	USD
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-3736000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-49471000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	19450000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	14114000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	251421000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	235053000	USD
CY2020Q1	kos	Effective Income Tax Rate Reconciliation Coronavirus Aid Relief And Economic Security Act Amount EffectiveIncomeTaxRateReconciliationCoronavirusAidReliefAndEconomicSecurityActAmount	4900000	USD
CY2020Q1	kos	Coronavirus Aid Relief And Economic Security Act Income Tax Refund Claim Amount CoronavirusAidReliefAndEconomicSecurityActIncomeTaxRefundClaimAmount	12200000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-416795000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25117000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-50860000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	37378000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	171264000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	33986000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-42587000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-90370000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9145000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	5013000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80894000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43131000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-87527000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5275000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-10681000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-1771000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	32690000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	0	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-13352000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3256000	USD
CY2020	kos	Effective Income Tax Rate Reconciliation Arbitration Settlement Amount EffectiveIncomeTaxRateReconciliationArbitrationSettlementAmount	0	USD
CY2019	kos	Effective Income Tax Rate Reconciliation Arbitration Settlement Amount EffectiveIncomeTaxRateReconciliationArbitrationSettlementAmount	0	USD
CY2018	kos	Effective Income Tax Rate Reconciliation Arbitration Settlement Amount EffectiveIncomeTaxRateReconciliationArbitrationSettlementAmount	-2834000	USD
CY2020	kos	Effective Income Tax Rate Reconciliation Nondeductible Expense Insurance Premiums EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInsurancePremiums	0	USD
CY2019	kos	Effective Income Tax Rate Reconciliation Nondeductible Expense Insurance Premiums EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInsurancePremiums	2625000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	890000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	3545000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	2643000	USD
CY2020	kos	Effective Income Tax Rate Reconciliation Deferred Tax Liability Undistributed Earnings Amount EffectiveIncomeTaxRateReconciliationDeferredTaxLiabilityUndistributedEarningsAmount	0	USD
CY2019	kos	Effective Income Tax Rate Reconciliation Deferred Tax Liability Undistributed Earnings Amount EffectiveIncomeTaxRateReconciliationDeferredTaxLiabilityUndistributedEarningsAmount	0	USD
CY2018	kos	Effective Income Tax Rate Reconciliation Deferred Tax Liability Undistributed Earnings Amount EffectiveIncomeTaxRateReconciliationDeferredTaxLiabilityUndistributedEarningsAmount	-2565000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	387000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	3998000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	656000	USD
CY2020	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0	USD
CY2019	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0	USD
CY2018	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	15305000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	1175000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	1224000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-387000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	86539000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	44889000	USD
CY2020Q4	kos	Operating Loss Carryforwards Foreign OperatingLossCarryforwardsForeign	105900000	USD
CY2020Q4	kos	Operating Loss Carry Forwards Foreign Expiring Next Twelve Months OperatingLossCarryForwardsForeignExpiringNextTwelveMonths	500000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	63335000	USD
CY2020	kos	Effective Income Tax Rate Reconciliation Carryback Income Tax Rate Differential Domestic Amount EffectiveIncomeTaxRateReconciliationCarrybackIncomeTaxRateDifferentialDomesticAmount	-4902000	USD
CY2019	kos	Effective Income Tax Rate Reconciliation Carryback Income Tax Rate Differential Domestic Amount EffectiveIncomeTaxRateReconciliationCarrybackIncomeTaxRateDifferentialDomesticAmount	0	USD
CY2018	kos	Effective Income Tax Rate Reconciliation Carryback Income Tax Rate Differential Domestic Amount EffectiveIncomeTaxRateReconciliationCarrybackIncomeTaxRateDifferentialDomesticAmount	0	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5209000	USD
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CY2019	kos	Gain Loss On Insurance Settlements GainLossOnInsuranceSettlements	3509000	USD
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CY2020	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	1966000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80894000	USD
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CY2019Q4	us-gaap	Assets Assets	4317232000	USD
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CY2018Q4	us-gaap	Assets Assets	4088189000	USD
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CY2020	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2102000	USD
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CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	440736000	USD
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CY2020	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	-42315000	USD
CY2019	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	33717000	USD
CY2018	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	26669000	USD
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CY2018	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	178293000	USD
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	25013000	USD
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CY2020	kos	Proceeds From Sale Of Oil And Gas Property And Equipment Including Amounts In Other Receivables ProceedsFromSaleOfOilAndGasPropertyAndEquipmentIncludingAmountsInOtherReceivables	99337000	USD
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CY2018	kos	Proceeds From Sale Of Oil And Gas Property And Equipment Including Amounts In Other Receivables ProceedsFromSaleOfOilAndGasPropertyAndEquipmentIncludingAmountsInOtherReceivables	13703000	USD
CY2020	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	-408000	USD
CY2019	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	6654000	USD
CY2018	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	765000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	273979000	USD
CY2020Q1	kos	Revenue And Other Income RevenueAndOtherIncome	177781000	USD
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CY2020Q1	us-gaap	Costs And Expenses CostsAndExpenses	295005000	USD
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CY2020Q3	us-gaap	Costs And Expenses CostsAndExpenses	261279000	USD
CY2020Q4	us-gaap	Costs And Expenses CostsAndExpenses	382579000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-182767000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-199391000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-37384000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	7956000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.45
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CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-52906000	USD
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CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09

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$KOS
Kosmos Energy Ltd. Stock $kos

2020 Q4 Form 10-K Financial Statement

#000150999121000031 Filed on February 23, 2021

Income Statement

Balance Sheet

Cashflow Statement

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$KOS Kosmos Energy Ltd. Stock $kos

2020 Q4 Form 10-K Financial Statement

#000150999121000031 Filed on February 23, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS
Kosmos Energy Ltd. Stock $kos