$KOS
Kosmos Energy Ltd. Stock $kos

$kos Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000150999121000086 Filed on November 08, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue	$572.6M	$198.9M	$224.8M
YoY Change	108.81%	-11.5%	-37.04%
Cost Of Revenue	$134.1M	$50.32M	$84.30M
YoY Change	29.1%	-40.31%	-11.73%
Gross Profit	$438.4M	$148.6M	$140.5M
YoY Change	157.44%	5.78%	-46.27%
Gross Profit Margin	76.57%	74.71%	62.5%
Selling, General & Admin	$24.90M	$22.46M	$18.30M
YoY Change	68.25%	22.73%	-25.91%
% of Gross Profit	5.68%	15.11%	13.02%
Research & Development	$23.93M	$23.98M	$14.00M
YoY Change	132.33%	71.3%	-38.6%
% of Gross Profit	5.46%	16.14%	9.96%
Depreciation & Amortization	$177.4M	$67.51M	$113.5M
YoY Change	9.44%	-40.52%	-23.83%
% of Gross Profit	40.46%	45.43%	80.78%
Operating Expenses	$216.1M	$112.9M	$148.3M
YoY Change	14.56%	-23.9%	-32.13%
Operating Profit	$222.4M	$35.77M	-$7.800M
YoY Change	-1315.05%	-558.56%	-118.14%
Interest Expense	-$53.50M	-$65.70M	-$27.00M
YoY Change	-31.59%	143.32%	694.12%
% of Operating Profit	-24.06%	-183.68%
Other Income/Expense, Net	$52.00K	-$194.0K	-$2.805M
YoY Change		-93.08%	-75.55%
Pretax Income	$155.8M	-$27.98M	-$36.49M
YoY Change	-1055.76%	-23.34%	-192.3%
Income Tax	$57.07M	$621.0K	$892.0K
% Of Pretax Income	36.63%
Net Earnings	$98.72M	-$28.60M	-$37.38M
YoY Change	1140.77%	-23.5%	-332.7%
Net Earnings / Revenue	17.24%	-14.37%	-16.63%
Basic Earnings Per Share		-$0.07	-$0.09
Diluted Earnings Per Share	$222.5K	-$0.07	-$0.09
COMMON SHARES
Basic Shares Outstanding	451.9M shares	408.5M shares	405.4M shares
Diluted Shares Outstanding		408.5M shares	405.4M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$131.6M	$111.3M	$300.8M
YoY Change	-11.66%	-62.99%	47.74%
Cash & Equivalents	$131.6M	$111.3M	$300.8M
Short-Term Investments
Other Short-Term Assets	$67.56M	$75.79M	$64.10M
YoY Change	55.31%	18.23%	-16.86%
Inventory	$165.2M	$153.0M	$142.2M
Prepaid Expenses
Receivables	$134.0M	$31.74M	$29.23M
Other Receivables	$6.614M	$17.97M	$19.63M
Total Short-Term Assets	$542.0M	$415.9M	$592.5M
YoY Change	35.39%	-29.8%	7.72%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.184B	$3.443B	$3.366B
YoY Change	25.99%	2.28%	-11.39%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$1.026M	$0.00	$7.100M
YoY Change	2.6%	-100.0%
Other Assets	$4.958M	$23.61M	$109.3M
YoY Change	-96.05%	-78.4%	23.92%
Total Long-Term Assets	$4.399B	$3.738B	$3.501B
YoY Change	26.86%	6.76%	-10.65%
TOTAL ASSETS
Total Short-Term Assets	$542.0M	$415.9M	$592.5M
Total Long-Term Assets	$4.399B	$3.738B	$3.501B
Total Assets	$4.941B	$4.154B	$4.094B
YoY Change	27.74%	1.47%	-8.39%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$184.4M	$143.2M	$184.1M
YoY Change	-16.72%	-22.23%	7.34%
Accrued Expenses	$250.7M	$180.7M	$186.6M
YoY Change	23.32%	-3.16%	-36.18%
Deferred Revenue	$31.99M	$20.74M	$24.44M
YoY Change	112.12%	-15.13%	-27.54%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$30.00M	$30.00M	$169.9M
YoY Change	300.0%	-82.34%
Total Short-Term Liabilities	$531.0M	$461.7M	$565.2M
YoY Change	15.37%	-18.31%	19.65%
LONG-TERM LIABILITIES
Long-Term Debt	$2.590B	$2.368B	$2.191B
YoY Change	23.13%	8.07%	4.05%
Other Long-Term Liabilities	$250.4M	$244.8M	$33.29M
YoY Change	568.52%	635.27%	2.06%
Total Long-Term Liabilities	$3.880B	$3.405B	$3.103B
YoY Change	30.78%	9.75%	-0.07%
TOTAL LIABILITIES
Total Short-Term Liabilities	$531.0M	$461.7M	$565.2M
Total Long-Term Liabilities	$3.880B	$3.405B	$3.103B
Total Liabilities	$4.411B	$3.867B	$3.668B
YoY Change	28.71%	5.43%	2.54%
SHAREHOLDERS EQUITY
Retained Earnings	-$1.712B	-$1.811B	-$1.643B
YoY Change	4.76%	10.26%	38.35%
Common Stock	$2.479B	$2.335B	$2.305B
YoY Change	7.22%	1.29%	-0.44%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$237.0M	$237.0M	$237.0M
YoY Change	0.0%	0.0%	0.0%
Treasury Stock Shares	44.26M shares	44.26M shares	44.26M shares
Shareholders Equity	$529.2M	$286.8M	$425.6M
YoY Change
Total Liabilities & Shareholders Equity	$4.941B	$4.154B	$4.094B
YoY Change	27.74%	1.47%	-8.39%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$98.72M	-$28.60M	-$37.38M
YoY Change	1140.77%	-23.5%	-332.7%
Depreciation, Depletion And Amortization	$177.4M	$67.51M	$113.5M
YoY Change	9.44%	-40.52%	-23.83%
Cash From Operating Activities	$230.5M	-$98.41M	$83.50M
YoY Change	31.42%	-217.86%	-53.06%
INVESTING ACTIVITIES
Capital Expenditures	-$560.1M	-$87.31M	-$80.50M
YoY Change	245.13%	8.46%	-10.95%
Acquisitions
YoY Change
Other Investing Activities	$1.006M	-$2.136M	-$11.30M
YoY Change	-98.83%	-81.1%	-16.91%
Cash From Investing Activities	-$559.1M	-$89.45M	-$91.70M
YoY Change	630.9%	-2.46%	-11.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	348.7M	149.6M	145.6M
YoY Change	-238.7%	2.77%	-433.94%
NET CHANGE
Cash From Operating Activities	230.5M	-98.41M	83.50M
Cash From Investing Activities	-559.1M	-89.45M	-91.70M
Cash From Financing Activities	348.7M	149.6M	145.6M
Net Change In Cash	20.05M	-38.22M	137.4M
YoY Change	-113.15%	-127.82%	353.47%
FREE CASH FLOW
Cash From Operating Activities	$230.5M	-$98.41M	$83.50M
Capital Expenditures	-$560.1M	-$87.31M	-$80.50M
Free Cash Flow	$790.7M	-$11.10M	$164.0M
YoY Change	134.13%	-106.77%	-38.87%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001509991
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-35167
	dei	Entity Registrant Name EntityRegistrantName	Kosmos Energy Ltd.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0686001
	dei	Entity Address Address Line1 EntityAddressAddressLine1	8176 Park Lane
	dei	Entity Address City Or Town EntityAddressCityOrTown	Dallas,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	75231
	dei	Security12b Title Security12bTitle	Common Stock $0.01 par value
	dei	Trading Symbol TradingSymbol	KOS
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	City Area Code CityAreaCode	214
	dei	Local Phone Number LocalPhoneNumber	445 9600
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	451889062	shares
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	111329000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	149027000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	43208000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	195000	USD
CY2021Q3	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	26147000	USD
CY2020Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	26002000	USD
CY2021Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	31740000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	44491000	USD
CY2021Q3	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	17970000	USD
CY2020Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	8320000	USD
CY2021Q3	us-gaap	Inventory Net InventoryNet	152950000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	128972000	USD
CY2021Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	32577000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	27870000	USD
CY2021Q3	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	0	USD
CY2020Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	15414000	USD
CY2021Q3	us-gaap	Assets Current AssetsCurrent	415921000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	400291000	USD
CY2021Q3	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3435384000	USD
CY2020Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3310276000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	7513000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	10637000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3442897000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3320913000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	305000	USD
CY2021Q3	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	0	USD
CY2020Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	964000	USD
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CY2021Q3	us-gaap	Oil And Gas Joint Interest Billing Receivables Noncurrent OilAndGasJointInterestBillingReceivablesNoncurrent	271295000	USD
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CY2021Q3	us-gaap	Accumulated Amortization Of Noncurrent Deferred Finance Costs AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts	19258000	USD
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CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	203260000	USD
CY2021Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	30000000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	7500000	USD
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CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	460199000	USD
CY2021Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2368240000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2103931000	USD
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CY2020Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	8069000	USD
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CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	244166000	USD
CY2021Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	505253000	USD
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CY2021Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	244779000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	37455000	USD
CY2021Q3	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	3405229000	USD
CY2020Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	2967240000	USD
CY2021Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2021Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
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CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
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CY2021Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	44263269	shares
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	44263269	shares
CY2021Q3	us-gaap	Treasury Stock Value TreasuryStockValue	237007000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	237007000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	286752000	USD
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	us-gaap	Revenues Revenues	759455000	USD
	us-gaap	Revenues Revenues	529880000	USD
CY2021Q3	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	1538000	USD
CY2020Q3	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	1564000	USD
	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
CY2021Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	66000	USD
CY2020Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	1000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	210000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	2000	USD
CY2021Q3	kos	Revenue And Other Income RevenueAndOtherIncome	200540000	USD
CY2020Q3	kos	Revenue And Other Income RevenueAndOtherIncome	224787000	USD
	kos	Revenue And Other Income RevenueAndOtherIncome	761229000	USD
	kos	Revenue And Other Income RevenueAndOtherIncome	529882000	USD
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	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	211871000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	234627000	USD
CY2021Q3	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	1554000	USD
CY2020Q3	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	2465000	USD
	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	3495000	USD
	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	10555000	USD
CY2021Q3	us-gaap	Exploration Expense ExplorationExpense	23982000	USD
CY2020Q3	us-gaap	Exploration Expense ExplorationExpense	13977000	USD
	us-gaap	Exploration Expense ExplorationExpense	41452000	USD
	us-gaap	Exploration Expense ExplorationExpense	74293000	USD
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	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	66628000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	57366000	USD
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	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	292616000	USD
	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	326390000	USD
CY2021Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
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	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	150820000	USD
CY2021Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	26873000	USD
CY2020Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	27068000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	90727000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	83177000	USD
CY2021Q3	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-38224000	USD
CY2020Q3	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-1187000	USD
	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-252606000	USD
	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	34776000	USD
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-194000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2805000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1003000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-27962000	USD
CY2021Q3	us-gaap	Costs And Expenses CostsAndExpenses	228516000	USD
CY2020Q3	us-gaap	Costs And Expenses CostsAndExpenses	261279000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	960398000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	930414000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-27976000	USD
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-36492000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-199169000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-400532000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	621000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	892000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-22617000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19010000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-28597000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-37384000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-176552000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-419542000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.07
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.43
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.04
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.43
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.04
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	408520000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	405409000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	408009000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	405131000	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	408520000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	405409000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	408009000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	405131000	shares
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0452
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	440154000	USD
CY2021Q1	us-gaap	Dividends Dividends	-90000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8327000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2021Q1	kos	Tax Withholdings For Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Used To Cover Employee Taxes TaxWithholdingsForShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUsedToCoverEmployeeTaxes	1018000	USD
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	-90768000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	356785000	USD
CY2021Q2	us-gaap	Dividends Dividends	-29000	USD
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7634000	USD
CY2021Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2021Q2	kos	Tax Withholdings For Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Used To Cover Employee Taxes TaxWithholdingsForShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUsedToCoverEmployeeTaxes	19000	USD
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	-57187000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	307242000	USD
CY2021Q3	us-gaap	Dividends Dividends	-21000	USD
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8149000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2021Q3	kos	Tax Withholdings For Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Used To Cover Employee Taxes TaxWithholdingsForShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUsedToCoverEmployeeTaxes	63000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-28597000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	286752000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	841702000	USD
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0452
CY2020Q1	us-gaap	Dividends Dividends	18918000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10078000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2020Q1	kos	Tax Withholdings For Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Used To Cover Employee Taxes TaxWithholdingsForShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUsedToCoverEmployeeTaxes	4947000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-182767000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	645148000	USD
CY2020Q2	us-gaap	Dividends Dividends	-24000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8406000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-199391000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	454187000	USD
CY2020Q3	us-gaap	Dividends Dividends	-27000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8734000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-37384000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	425564000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-176552000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-419542000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	300404000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	333120000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-68366000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3715000	USD
	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	16772000	USD
	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	24338000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	150820000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-259289000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	32156000	USD
	kos	Cash Settlements On Commodity Derivatives Net CashSettlementsOnCommodityDerivativesNet	-142900000	USD
	kos	Cash Settlements On Commodity Derivatives Net CashSettlementsOnCommodityDerivativesNet	22800000	USD
	kos	Cash Settlements On Derivatives Net CashSettlementsOnDerivativesNet	-150255000	USD
	kos	Cash Settlements On Derivatives Net CashSettlementsOnDerivativesNet	16904000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	24011000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	26392000	USD
	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	1564000	USD
	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-15223000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2893000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	2763000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-6673000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-1537000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-88107000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	24280000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	30848000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	4800000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-3253000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-35545000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2631000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-9270000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-150381000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	143841000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	20657000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	377125000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	215425000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	725000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	1838000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	5327000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	1713000	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	41712000	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	53574000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-414235000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-269124000	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	250000000	USD
	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	300000000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	400000000	USD
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	USD
	kos	Proceeds From Advances Under Production Prepayment Agreement ProceedsFromAdvancesUnderProductionPrepaymentAgreement	0	USD
	kos	Proceeds From Advances Under Production Prepayment Agreement ProceedsFromAdvancesUnderProductionPrepaymentAgreement	50000000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	444375000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
	kos	Payments For Tax Withholdings On Restricted Stock Units PaymentsForTaxWithholdingsOnRestrictedStockUnits	1100000	USD
	kos	Payments For Tax Withholdings On Restricted Stock Units PaymentsForTaxWithholdingsOnRestrictedStockUnits	4947000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	512000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	19174000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	17291000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	4570000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	275472000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	321309000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	5078000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	72842000	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
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	154842000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	302188000	USD
	us-gaap	Interest Paid Net InterestPaidNet	61046000	USD
	us-gaap	Interest Paid Net InterestPaidNet	101908000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	67581000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	68330000	USD
	kos	Production Prepayment Agreement Exchanged For Term Loan ProductionPrepaymentAgreementExchangedForTermLoan	0	USD
	kos	Production Prepayment Agreement Exchanged For Term Loan ProductionPrepaymentAgreementExchangedForTermLoan	50000000	USD
	us-gaap	Nature Of Operations NatureOfOperations	Organization<div style="text-indent:63pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="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="text-align:justify;text-indent:36pt"><span><br/></span></div><div style="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 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 U.S. Gulf of Mexico. Kosmos is listed on the New York Stock Exchange and London Stock Exchange and is traded under the ticker symbol KOS.</span></div><div style="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%"> </span></div><div style="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 U.S. Gulf of Mexico.</span></div>
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="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="text-align:justify;text-indent:63pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div>Certain prior period amounts have been reclassified to conform with the current presentation. Such reclassifications had no significant impact on our reported net loss, current assets, total assets, current liabilities, total liabilities, stockholders’ equity or cash flows.
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	111329000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	149027000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	43208000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	195000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	305000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	542000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	154842000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	149764000	USD
CY2021Q3	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	127900000	USD
CY2020Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	127500000	USD
CY2021Q3	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	25100000	USD
CY2020Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	1500000	USD
	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Concentration of Credit Risk</span></div><div style="text-align:justify"><span><br/></span></div><div style="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%">Our revenue can be materially affected by current economic conditions and the price of oil and natural gas. However, based on the current demand for crude oil and natural gas and the fact that alternative purchasers are available, we believe that the loss of our marketing agents and/or any of the purchasers identified by our marketing agents would not have a long‑term material adverse effect on our financial position or results of operations. The continued economic disruption resulting from the COVID-19 pandemic could materially impact the Company’s business in future periods. Any potential disruption will depend on the duration and intensity of these events, which are highly uncertain and cannot be predicted at this time.</span></div>
CY2021Q3	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	5751720000	USD
CY2020Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	5369737000	USD
CY2021Q3	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	515499000	USD
CY2020Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	495390000	USD
CY2021Q3	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	6267219000	USD
CY2020Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	5865127000	USD
CY2021Q3	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	2831835000	USD
CY2020Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	2554851000	USD
CY2021Q3	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3435384000	USD
CY2020Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3310276000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	58541000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	59949000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	51028000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	49312000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	7513000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	10637000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3442897000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3320913000	USD
CY2021Q3	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	58800000	USD
CY2020Q3	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	104900000	USD
	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	274600000	USD
	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	307800000	USD
CY2020Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2021Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2020Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Two Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndTwoYears	28692000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	150800000	USD
CY2020Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	186289000	USD
	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	20257000	USD
	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	201000	USD
	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	0	USD
CY2021Q3	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	206345000	USD
CY2021Q3	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	11393000	USD
CY2020Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	0	USD
CY2021Q3	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Two Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndTwoYears	30684000	USD
CY2021Q3	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To Three Year And Five Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYearAndFiveYears	164268000	USD
CY2020Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To Three Year And Five Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYearAndFiveYears	157597000	USD
CY2021Q3	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	206345000	USD
CY2020Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	186289000	USD
CY2021Q3	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	3	project
CY2020Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	3	project
CY2021Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2450000000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2150000000	USD
CY2021Q3	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	51760000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	38569000	USD
CY2021Q3	us-gaap	Long Term Debt LongTermDebt	2398240000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	2111431000	USD
CY2021Q3	us-gaap	Long Term Debt Current LongTermDebtCurrent	30000000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	7500000	USD
CY2021Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2368240000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2103931000	USD
CY2021Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2450000000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	7500000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	30000000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	142621000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	237834000	USD
CY2021Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	402692000	USD
CY2021Q3	kos	Long Term Debt Maturity After Year Four LongTermDebtMaturityAfterYearFour	1629353000	USD
CY2020Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2255000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7788000	USD
CY2021Q3	us-gaap	Interest Costs Incurred InterestCostsIncurred	36055000	USD
CY2020Q3	us-gaap	Interest Costs Incurred InterestCostsIncurred	29760000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	103229000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	90031000	USD
CY2021Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2597000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	6730000	USD
CY2021Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-678000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-15223000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2893000	USD
CY2021Q3	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	12252000	USD
CY2020Q3	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	5806000	USD
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	31956000	USD
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	18062000	USD
CY2021Q3	kos	Deferred Interest DeferredInterest	-600000	USD
CY2020Q3	kos	Deferred Interest DeferredInterest	531000	USD
	kos	Deferred Interest DeferredInterest	-724000	USD
	kos	Deferred Interest DeferredInterest	2028000	USD
CY2021Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2237000	USD
CY2020Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1269000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	8309000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3371000	USD
CY2021Q3	kos	Other Financing Costs Net OtherFinancingCostsNet	3310000	USD
CY2020Q3	kos	Other Financing Costs Net OtherFinancingCostsNet	919000	USD
	kos	Other Financing Costs Net OtherFinancingCostsNet	5476000	USD
	kos	Other Financing Costs Net OtherFinancingCostsNet	2928000	USD
CY2021Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	26873000	USD
CY2020Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	27068000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	90727000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	83177000	USD
CY2021Q3	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-36130000	USD
CY2020Q3	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	540000	USD
	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-259289000	USD
	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	32156000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	150800000	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	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2021Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-27976000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-36492000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-199169000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-400532000	USD
CY2021Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.02
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.02
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.11
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.05
CY2021Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-28597000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-37384000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-176552000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-419542000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	408520000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	405409000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	408009000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	405131000	shares
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	408520000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	405409000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	408009000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	405131000	shares
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.07
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.43
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.04
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.43
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.04
CY2021Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	15400000	shares
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11600000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	15000000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11400000	shares
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0452
CY2021Q3	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	56941000	USD
CY2020Q4	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	89162000	USD
CY2021Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	20737000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	15079000	USD
CY2021Q3	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	5130000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	7255000	USD
CY2021Q3	kos	Accrued General And Administrative Expenses Current AccruedGeneralAndAdministrativeExpensesCurrent	19773000	USD
CY2020Q4	kos	Accrued General And Administrative Expenses Current AccruedGeneralAndAdministrativeExpensesCurrent	4988000	USD
CY2021Q3	us-gaap	Interest Payable Current InterestPayableCurrent	34222000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	23725000	USD
CY2021Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	15443000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	37344000	USD
CY2021Q3	kos	Accrual For All Other Taxes Current AccrualForAllOtherTaxesCurrent	3765000	USD
CY2020Q4	kos	Accrual For All Other Taxes Current AccrualForAllOtherTaxesCurrent	2815000	USD
CY2021Q3	kos	Derivative Liability Settled Current DerivativeLiabilitySettledCurrent	19850000	USD
CY2020Q4	kos	Derivative Liability Settled Current DerivativeLiabilitySettledCurrent	17475000	USD
CY2021Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	4864000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	5417000	USD
CY2021Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	180725000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	203260000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	15082000	USD
CY2021Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	270539000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	251421000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	6419000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2828000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	445000	USD
CY2021Q3	us-gaap	Inventory Write Down InventoryWriteDown	-280000	USD
CY2020Q3	us-gaap	Inventory Write Down InventoryWriteDown	1200000	USD
	us-gaap	Inventory Write Down InventoryWriteDown	302000	USD
	us-gaap	Inventory Write Down InventoryWriteDown	3028000	USD
	us-gaap	Restructuring Charges RestructuringCharges	13268000	USD
CY2021Q3	kos	Loss On Asset Retirement Obligation Liabilities Settled Net LossOnAssetRetirementObligationLiabilitiesSettledNet	58000	USD
CY2020Q3	kos	Loss On Asset Retirement Obligation Liabilities Settled Net LossOnAssetRetirementObligationLiabilitiesSettledNet	-170000	USD
	kos	Loss On Asset Retirement Obligation Liabilities Settled Net LossOnAssetRetirementObligationLiabilitiesSettledNet	444000	USD
	kos	Loss On Asset Retirement Obligation Liabilities Settled Net LossOnAssetRetirementObligationLiabilitiesSettledNet	1952000	USD
CY2021Q3	us-gaap	Restructuring Charges RestructuringCharges	-127000	USD
CY2020Q3	us-gaap	Restructuring Charges RestructuringCharges	-72000	USD
	us-gaap	Restructuring Charges RestructuringCharges	710000	USD
CY2021Q3	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-543000	USD
CY2020Q3	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-1847000	USD
	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	453000	USD
	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-9714000	USD
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-194000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2805000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1003000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-27962000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2021Q3	us-gaap	Revenues Revenues	198936000	USD
CY2021Q3	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	1538000	USD
CY2021Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	66000	USD
CY2021Q3	kos	Revenue And Other Income RevenueAndOtherIncome	200540000	USD
CY2021Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	50316000	USD
CY2021Q3	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	1554000	USD
CY2021Q3	us-gaap	Exploration Expense ExplorationExpense	23982000	USD
CY2021Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	22459000	USD
CY2021Q3	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	64914000	USD
CY2021Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2021Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	26873000	USD
CY2021Q3	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-38224000	USD
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-194000	USD
CY2021Q3	us-gaap	Costs And Expenses CostsAndExpenses	228516000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-27976000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	621000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-28597000	USD
CY2021Q3	kos	Cost Incurred Capital Expenditures Excluding Capitalized Interest CostIncurredCapitalExpendituresExcludingCapitalizedInterest	86046000	USD
	us-gaap	Revenues Revenues	759455000	USD
	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	1564000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	210000	USD
	kos	Revenue And Other Income RevenueAndOtherIncome	761229000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	211871000	USD
	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	3495000	USD
	us-gaap	Exploration Expense ExplorationExpense	41452000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	66628000	USD
	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	292616000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	90727000	USD
	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-252606000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1003000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	960398000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-199169000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-22617000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2805000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-176552000	USD
	kos	Cost Incurred Capital Expenditures Excluding Capitalized Interest CostIncurredCapitalExpendituresExcludingCapitalizedInterest	353410000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3442897000	USD
CY2021Q3	us-gaap	Assets Assets	4153724000	USD
CY2020Q3	us-gaap	Revenues Revenues	224786000	USD
CY2020Q3	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
CY2020Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	1000	USD
CY2020Q3	kos	Revenue And Other Income RevenueAndOtherIncome	224787000	USD
CY2020Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	84277000	USD
CY2020Q3	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	2465000	USD
CY2020Q3	us-gaap	Exploration Expense ExplorationExpense	13977000	USD
CY2020Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	18269000	USD
CY2020Q3	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	111231000	USD
CY2020Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2020Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	27068000	USD
CY2020Q3	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-1187000	USD
CY2020Q3	us-gaap	Costs And Expenses CostsAndExpenses	261279000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-36492000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	892000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-37384000	USD
CY2020Q3	kos	Cost Incurred Capital Expenditures Excluding Capitalized Interest CostIncurredCapitalExpendituresExcludingCapitalizedInterest	99507000	USD
	us-gaap	Revenues Revenues	529880000	USD
	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	2000	USD
	kos	Revenue And Other Income RevenueAndOtherIncome	529882000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	234627000	USD
	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	10555000	USD
	us-gaap	Exploration Expense ExplorationExpense	74293000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	57366000	USD
	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	326390000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	150820000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	83177000	USD
	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	34776000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-27962000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	930414000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-400532000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19010000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-419542000	USD
	kos	Cost Incurred Capital Expenditures Excluding Capitalized Interest CostIncurredCapitalExpendituresExcludingCapitalizedInterest	250358000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3366304000	USD
CY2020Q3	us-gaap	Assets Assets	4093501000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	377125000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	215425000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	725000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	1838000	USD
	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	-16523000	USD
	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	-6284000	USD
	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	24680000	USD
	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	49955000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	31956000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	18062000	USD
	kos	Proceeds From Sale Of Oil And Gas Property And Equipment Including Amounts In Other Receivables ProceedsFromSaleOfOilAndGasPropertyAndEquipmentIncludingAmountsInOtherReceivables	3395000	USD
	kos	Proceeds From Sale Of Oil And Gas Property And Equipment Including Amounts In Other Receivables ProceedsFromSaleOfOilAndGasPropertyAndEquipmentIncludingAmountsInOtherReceivables	0	USD
	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	2754000	USD
	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	7486000	USD
	kos	Cost Incurred Capital Expenditures Excluding Capitalized Interest CostIncurredCapitalExpendituresExcludingCapitalizedInterest	353410000	USD
	kos	Cost Incurred Capital Expenditures Excluding Capitalized Interest CostIncurredCapitalExpendituresExcludingCapitalizedInterest	250358000	USD

Files In Submission

Name	View Source	Status
0001509991-21-000086-index-headers.html	Edgar Link	pending
0001509991-21-000086-index.html	Edgar Link	pending
0001509991-21-000086.txt	Edgar Link	pending
0001509991-21-000086-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
kos-20210930.htm	Edgar Link	pending
kos-20210930.xsd	Edgar Link	pending
kos-20210930_cal.xml	Edgar Link	unprocessable
kos-20210930_def.xml	Edgar Link	unprocessable
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kos-20210930_htm.xml	Edgar Link	completed
kos-20210930_lab.xml	Edgar Link	unprocessable
kos-20210930_pre.xml	Edgar Link	unprocessable
kos-9302021xex311.htm	Edgar Link	pending
kos-9302021xex312.htm	Edgar Link	pending
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$KOS
Kosmos Energy Ltd. Stock $kos

2021 Q4 Form 10-Q Financial Statement

#000150999121000086 Filed on November 08, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS Kosmos Energy Ltd. Stock $kos

2021 Q4 Form 10-Q Financial Statement

#000150999121000086 Filed on November 08, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS
Kosmos Energy Ltd. Stock $kos