$KOS
Kosmos Energy Ltd. Stock $kos

$kos Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000150999120000052 Filed on February 25, 2020

Income Statement

Concept	2019 Q4	2019	2018 Q4
Revenue	$449.7M	$1.499B	$301.4M
YoY Change	49.2%	69.11%	61.09%
Cost Of Revenue	$136.3M	$402.6M	$73.10M
YoY Change	86.46%	79.17%	58.23%
Gross Profit	$313.4M	$1.097B	$228.4M
YoY Change	37.22%	65.7%	62.1%
Gross Profit Margin	69.69%	73.15%	75.78%
Selling, General & Admin	$21.30M	$110.0M	$34.50M
YoY Change	-38.26%	10.11%	94.92%
% of Gross Profit	6.8%	10.03%	15.11%
Research & Development	$97.90M	$181.0M	$54.60M
YoY Change	79.3%	-39.97%	2.25%
% of Gross Profit	31.24%	16.5%	23.91%
Depreciation & Amortization	$149.9M	$573.1M	$123.5M
YoY Change	21.38%	68.95%	60.81%
% of Gross Profit	47.83%	52.25%	54.07%
Operating Expenses	$261.0M	$841.2M	$197.2M
YoY Change	32.35%	15.14%	43.0%
Operating Profit	$52.40M	$255.6M	$31.20M
YoY Change	67.95%	-472.05%	940.0%
Interest Expense	-$65.20M	-$200.2M	$247.9M
YoY Change	-126.3%	-3277.78%	-299.12%
% of Operating Profit	-124.43%	-78.33%	794.55%
Other Income/Expense, Net	$0.00	-$24.65M	$8.100M
YoY Change	-100.0%	-479.14%
Pretax Income	-$2.300M	$25.12M	$287.0M
YoY Change	-100.8%	-149.38%	-336.21%
Income Tax	$33.50M	$80.89M	$101.5M
% Of Pretax Income		322.07%	35.37%
Net Earnings	-$35.77M	-$55.78M	$185.6M
YoY Change	-119.28%	-40.66%	-252.0%
Net Earnings / Revenue	-7.95%	-3.72%	61.57%
Basic Earnings Per Share	-$0.09	-$0.14	$0.44
Diluted Earnings Per Share	-$0.09	-$0.14	$0.43
COMMON SHARES
Basic Shares Outstanding	401.5M shares	401.4M shares	433.6M shares
Diluted Shares Outstanding		401.4M shares

Balance Sheet

Concept	2019 Q4	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$224.5M	$224.5M	$173.5M
YoY Change	29.39%	29.39%	-25.66%
Cash & Equivalents	$224.5M	$224.5M	$173.5M
Short-Term Investments
Other Short-Term Assets	$53.40M	$53.40M	$111.3M
YoY Change	-52.02%	-52.02%	65.13%
Inventory	$114.4M	$114.4M	$84.83M
Prepaid Expenses
Receivables	$64.14M	$145.6M	$48.16M
Other Receivables	$28.73M	$28.70M	$21.69M
Total Short-Term Assets	$566.6M	$566.6M	$509.7M
YoY Change	11.15%	11.16%	-4.48%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.642B	$3.662B	$3.460B
YoY Change	5.28%	5.86%	49.26%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$0.00	$2.300M	$51.90M
YoY Change	-100.0%	-96.53%	-78.06%
Other Assets	$86.00M	$86.00M	$52.60M
YoY Change	63.5%	63.5%	-49.71%
Total Long-Term Assets	$3.751B	$3.751B	$3.578B
YoY Change	4.81%	4.81%	34.58%
TOTAL ASSETS
Total Short-Term Assets	$566.6M	$566.6M	$509.7M
Total Long-Term Assets	$3.751B	$3.751B	$3.578B
Total Assets	$4.317B	$4.317B	$4.088B
YoY Change	5.6%	5.6%	28.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$149.5M	$149.5M	$176.5M
YoY Change	-15.33%	-15.3%	24.51%
Accrued Expenses	$380.7M	$272.3M	$195.6M
YoY Change	94.64%	46.24%	-10.85%
Deferred Revenue	$32.48M		$24.38M
YoY Change	33.24%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00
YoY Change
Total Short-Term Liabilities	$539.1M	$539.1M	$384.3M
YoY Change	40.28%	40.28%	-10.36%
LONG-TERM LIABILITIES
Long-Term Debt	$2.008B	$2.008B	$2.121B
YoY Change	-5.3%	-5.3%	65.31%
Other Long-Term Liabilities	$33.14M	$275.1M	$9.160M
YoY Change	261.8%	67.03%	-13.68%
Total Long-Term Liabilities	$2.936B	$2.283B	$2.762B
YoY Change	6.3%	-0.09%	47.98%
TOTAL LIABILITIES
Total Short-Term Liabilities	$539.1M	$539.1M	$384.3M
Total Long-Term Liabilities	$2.936B	$2.283B	$2.762B
Total Liabilities	$3.476B	$3.476B	$3.147B
YoY Change	10.45%	10.45%	37.08%
SHAREHOLDERS EQUITY
Retained Earnings	-$1.223B		-$1.167B
YoY Change	4.78%		8.76%
Common Stock	$2.302B		$2.346B
YoY Change	-1.88%		16.21%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$237.0M		$237.0M
YoY Change	0.0%		391.75%
Treasury Stock Shares	44.26M shares		44.26M shares
Shareholders Equity	$841.7M	$841.7M	$941.5M
YoY Change
Total Liabilities & Shareholders Equity	$4.317B	$4.317B	$4.088B
YoY Change	5.6%	5.6%	28.05%

Cashflow Statement

Concept	2019 Q4	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	-$35.77M	-$55.78M	$185.6M
YoY Change	-119.28%	-40.66%	-252.0%
Depreciation, Depletion And Amortization	$149.9M	$573.1M	$123.5M
YoY Change	21.38%	68.95%	60.81%
Cash From Operating Activities	$227.9M	$628.2M	$170.3M
YoY Change	33.82%	141.14%	19.76%
INVESTING ACTIVITIES
Capital Expenditures	-$103.1M	$440.7M	-$68.90M
YoY Change	49.64%	14.35%	68.05%
Acquisitions
YoY Change
Other Investing Activities	$7.700M	-$11.90M	$42.10M
YoY Change	-81.71%	-106.0%	-118.2%
Cash From Investing Activities	-$95.40M	-$363.9M	-$26.80M
YoY Change	255.97%	-63.06%	-90.16%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change		-100.0%
Debt Paid & Issued, Net		$425.0M
YoY Change		30.77%
Cash From Financing Activities	-118.2M	-$220.5M	-165.3M
YoY Change	-28.49%	-136.43%	-182.73%
NET CHANGE
Cash From Operating Activities	227.9M	$628.2M	170.3M
Cash From Investing Activities	-95.40M	-$363.9M	-26.80M
Cash From Financing Activities	-118.2M	-$220.5M	-165.3M
Net Change In Cash	14.30M	$43.73M	-21.80M
YoY Change	-165.6%	-136.63%	-131.28%
FREE CASH FLOW
Cash From Operating Activities	$227.9M	$628.2M	$170.3M
Capital Expenditures	-$103.1M	$440.7M	-$68.90M
Free Cash Flow	$331.0M	$187.4M	$239.2M
YoY Change	38.38%	-250.0%	30.57%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001509991
CY2017	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	38700000	USD
CY2018	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	-137100000	USD
CY2019	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	-36300000	USD
CY2018Q4	kos	Oil And Gas Imbalance Asset Liability OilAndGasImbalanceAssetLiability	0	USD
CY2018Q4	us-gaap	Accumulated Amortization Of Noncurrent Deferred Finance Costs AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts	12065000	USD
CY2019Q4	us-gaap	Accumulated Amortization Of Noncurrent Deferred Finance Costs AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts	14681000	USD
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	442914675	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	445779367	shares
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	44263269	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	44263269	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	001-35167
CY2019	dei	Entity Registrant Name EntityRegistrantName	Kosmos Energy Ltd.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0686001
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	8176 Park Lane
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Dallas,
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	75231
CY2019	dei	City Area Code CityAreaCode	214
CY2019	dei	Local Phone Number LocalPhoneNumber	445 9600
CY2019	dei	Security12b Title Security12bTitle	Common Stock $0.01 par value
CY2019	dei	Trading Symbol TradingSymbol	KOS
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q4	dei	Entity Public Float EntityPublicFloat	2220129484	USD
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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
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
CY2019Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	81424000	USD
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CY2019Q4	us-gaap	Inventory Net InventoryNet	114412000	USD
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CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	68040000	USD
CY2019Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	12856000	USD
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CY2019Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3624751000	USD
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CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	USD
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CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2008063000	USD
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CY2019	kos	Revenue And Other Income RevenueAndOtherIncome	1509909000	USD
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CY2019	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-71885000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80894000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43131000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44937000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-55777000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-93991000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-222792000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.14
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.23
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.57
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.14
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.23
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.57
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
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	388375000	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
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	388375000	shares
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1081199000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	40899000	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2017	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	2194000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-222792000	USD
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
CY2019	us-gaap	Dividends Dividends	74813000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	941478000	USD
CY2017	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	43201000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-67436000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	29960000	USD
CY2017	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-71822000	USD
CY2019	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	-31458000	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
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-55777000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-93991000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-222792000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	573118000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	339214000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	265407000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-90370000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9145000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9505000	USD
CY2019	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	87813000	USD
CY2018	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	123199000	USD
CY2018	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	-137942000	USD
CY2017	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	25888000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	32370000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	35230000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	39913000	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
CY2017	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	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
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	0	USD
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	45000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6252000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-9069000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2865000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-5952000	USD
CY2019	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	29735000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-175954000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-29365000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	28970000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-8848000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1653000	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
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	31710000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-83921000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7440000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-94434000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	129723000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-157393000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	86595000	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
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	236617000	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
CY2017	us-gaap	Payments To Acquire Oil And Gas Equipment PaymentsToAcquireOilAndGasEquipment	140495000	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
CY2017	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2858000	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
CY2017	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	0	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	231280000	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
CY2017	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	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
CY2017	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	222068000	USD
CY2019	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	26918000	USD
CY2018	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	0	USD
CY2017	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	0	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
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-152565000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	175000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1175000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	425000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	325000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	605277000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	200000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-52261000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	250000000	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
CY2017	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2019	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	535338000	USD
CY2018	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2017	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2019	kos	Payment Tax Withholding Share Based Payment Arrangement And Repurchase Of Common Stock PaymentTaxWithholdingShareBasedPaymentArrangementAndRepurchaseOfCommonStock	1983000	USD
CY2018	kos	Payment Tax Withholding Share Based Payment Arrangement And Repurchase Of Common Stock PaymentTaxWithholdingShareBasedPaymentArrangementAndRepurchaseOfCommonStock	206051000	USD
CY2017	kos	Payment Tax Withholding Share Based Payment Arrangement And Repurchase Of Common Stock PaymentTaxWithholdingShareBasedPaymentArrangementAndRepurchaseOfCommonStock	2194000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	72599000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2444000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	38672000	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	67000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-220489000	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
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	31791000	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
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	273195000	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
CY2019	us-gaap	Interest Paid Net InterestPaidNet	99928000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	83831000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	55381000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	43909000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	45984000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	48815000	USD
CY2019	kos	Contribution To Equity Method Investment ContributionToEquityMethodInvestment	0	USD
CY2018	kos	Contribution To Equity Method Investment ContributionToEquityMethodInvestment	0	USD
CY2017	kos	Contribution To Equity Method Investment ContributionToEquityMethodInvestment	133893000	USD
CY2019	kos	Dissolution Of Equity Method Investment DissolutionOfEquityMethodInvestment	0	USD
CY2018	kos	Dissolution Of Equity Method Investment DissolutionOfEquityMethodInvestment	0	USD
CY2017	kos	Dissolution Of Equity Method Investment DissolutionOfEquityMethodInvestment	122407000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	307944000	USD
CY2017	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	Organization<div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Kosmos Energy Ltd. changed its jurisdiction of incorporation from Bermuda to the State of Delaware (the "Redomestication") in December 2018. All outstanding common shares of Kosmos Energy Ltd., an exempted company incorporated pursuant to the laws of Bermuda, were automatically converted by operation of law, on a one-for-one basis, into shares of common stock of Kosmos Energy Ltd., a company incorporated pursuant to the laws of Delaware. The number of shares of the Company’s common stock outstanding immediately after the Redomestication was the same as the number of common shares of Kosmos Energy Ltd. outstanding immediately prior to the Redomestication. Kosmos Energy Ltd. was originally incorporated pursuant to the laws of Bermuda in January 2011 to become a holding company for Kosmos Energy Holdings. As part of the Redomestication, we 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="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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 exploration program balanced between proven basin infrastructure-led exploration (Equatorial Guinea and U.S. Gulf of Mexico), emerging basins (Mauritania, Senegal and Suriname) and frontier basins (Cote d'Ivoire, Namibia, Sao Tome and Principe, and South Africa). </span><span style="font-family:inherit;font-size:10pt;">Kosmos is listed on the NYSE and LSE and is traded under the ticker symbol KOS.</span><span style="font-family:inherit;font-size:10pt;"> </span></div><span style="font-family:inherit;font-size:10pt;">Kosmos is engaged in a single line of business, which is the exploration and production of oil and natural gas. We have operations in </span><span style="font-family:inherit;font-size:10pt;"><span>four</span></span> geographic areas: Ghana, Equatorial Guinea, Mauritania/Senegal and the United States of America.
CY2019	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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. Actual results could differ from these estimates.</span></div>
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Reclassifications</span></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Certain prior period amounts have been reclassified to conform with the current year presentation. Such reclassifications had no material impact on our reported net income (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>
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
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	233412000	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
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	56380000	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
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	15194000	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
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	2700000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1200000	USD
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;padding-bottom:12px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Concentration of Credit Risk</span></div>Our 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	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	83400000	USD
CY2019Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	2100000	USD
CY2018Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	1400000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	4600000	USD
CY2019Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	112300000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	300000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	900000	USD
CY2019	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2019Q4	kos	Oil And Gas Imbalance Asset Liability OilAndGasImbalanceAssetLiability	0	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	11500000	USD
CY2018Q4	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	35000000	shares
CY2018Q4	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	5.38
CY2018Q4	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	188000000	USD
CY2018Q4	kos	Number Of Companies In Alliance NumberOfCompaniesInAlliance	2	company
CY2019Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	4904648000	USD
CY2018Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	4236489000	USD
CY2019Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	814065000	USD
CY2018Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	759472000	USD
CY2019Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	5718713000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	4995961000	USD
CY2019Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	2093962000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	1551097000	USD
CY2019Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3624751000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	367665000	USD
CY2017Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	410113000	USD
CY2019	kos	Capitalized Exploratory Well Cost Expensed In Same Period CapitalizedExploratoryWellCostExpensedInSamePeriod	3000000.0	USD
CY2018	kos	Capitalized Exploratory Well Cost Expensed In Same Period CapitalizedExploratoryWellCostExpensedInSamePeriod	65600000	USD
CY2017	kos	Capitalized Exploratory Well Cost Expensed In Same Period CapitalizedExploratoryWellCostExpensedInSamePeriod	43200000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3444864000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	61598000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	51987000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	44017000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	37150000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	17581000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	14837000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3642332000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3459701000	USD
CY2019	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	542900000	USD
CY2018	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	316300000	USD
CY2017	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	244900000	USD
CY2019	us-gaap	Depreciation Depreciation	6900000	USD
CY2018	us-gaap	Depreciation Depreciation	4600000	USD
CY2017	us-gaap	Depreciation Depreciation	3400000	USD
CY2016Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	734463000	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
CY2017	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	69567000	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
CY2017	kos	Capitalized Exploratory Well Cost Additions Associated With Acquisition CapitalizedExploratoryWellCostAdditionsAssociatedWithAcquisition	0	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
CY2017	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	176881000	USD
CY2019	kos	Capitalized Exploratory Well Cost Reduction For Divestitures CapitalizedExploratoryWellCostReductionForDivestitures	0	USD
CY2018	kos	Capitalized Exploratory Well Cost Reduction For Divestitures CapitalizedExploratoryWellCostReductionForDivestitures	0	USD
CY2017	kos	Capitalized Exploratory Well Cost Reduction For Divestitures CapitalizedExploratoryWellCostReductionForDivestitures	206400000	USD
CY2019	kos	Capitalized Exploratory Well Cost Reduction For Contribution To Equity Method Investment CapitalizedExploratoryWellCostReductionForContributionToEquityMethodInvestment	0	USD
CY2018	kos	Capitalized Exploratory Well Cost Reduction For Contribution To Equity Method Investment CapitalizedExploratoryWellCostReductionForContributionToEquityMethodInvestment	0	USD
CY2017	kos	Capitalized Exploratory Well Cost Reduction For Contribution To Equity Method Investment CapitalizedExploratoryWellCostReductionForContributionToEquityMethodInvestment	131764000	USD
CY2019	kos	Capitalized Exploratory Well Cost Addition For Dissolution Of Equity Method Investment CapitalizedExploratoryWellCostAdditionForDissolutionOfEquityMethodInvestment	0	USD
CY2018	kos	Capitalized Exploratory Well Cost Addition For Dissolution Of Equity Method Investment CapitalizedExploratoryWellCostAdditionForDissolutionOfEquityMethodInvestment	0	USD
CY2017	kos	Capitalized Exploratory Well Cost Addition For Dissolution Of Equity Method Investment CapitalizedExploratoryWellCostAdditionForDissolutionOfEquityMethodInvestment	121128000	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
CY2017	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	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
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
CY2017Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	67159000	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
CY2017Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears	291252000	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
CY2017Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToThreeYears	51702000	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
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
CY2017Q4	us-gaap	Projects That Have Exploratory Well Costs That Have Been Capitalized For Period Greater Than One Year ProjectsThatHaveExploratoryWellCostsThatHaveBeenCapitalizedForPeriodGreaterThanOneYear	5	project
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	51896000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2050000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2175000000	USD
CY2019Q4	kos	Debt Instrument Unamortized Issuance Costs And Discounts DebtInstrumentUnamortizedIssuanceCostsAndDiscounts	41937000	USD
CY2018Q4	kos	Debt Instrument Unamortized Issuance Costs And Discounts DebtInstrumentUnamortizedIssuanceCostsAndDiscounts	54453000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2008063000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	2120547000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2050000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	174800000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	284200000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	271600000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	440829000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	878571000	USD
CY2019	us-gaap	Interest Costs Incurred InterestCostsIncurred	145507000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	114134000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	92687000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	9257000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	9379000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	10204000	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
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	28077000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	28331000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	30282000	USD
CY2019	kos	Deferred Interest DeferredInterest	1919000	USD
CY2018	kos	Deferred Interest DeferredInterest	-1138000	USD
CY2017	kos	Deferred Interest DeferredInterest	2577000	USD
CY2019	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3692000	USD
CY2018	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3455000	USD
CY2017	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3422000	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
CY2017	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	5831000	USD
CY2019	kos	Interest Expense Income Net InterestExpenseIncomeNet	155074000	USD
CY2018	kos	Interest Expense Income Net InterestExpenseIncomeNet	101176000	USD
CY2017	kos	Interest Expense Income Net InterestExpenseIncomeNet	77595000	USD
CY2019	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-70724000	USD
CY2018	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	29960000	USD
CY2017	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-71822000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	151953000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	66595000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	11218000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5311000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	7156000	USD
CY2018	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	3345000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-49471000	USD
CY2018	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	14114000	USD
CY2018	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	8910000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	235053000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	151953000	USD
CY2017Q4	us-gaap	Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit	16700000	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
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-177855000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	171264000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	33986000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	35432000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-90370000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9145000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9505000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80894000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43131000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44937000	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
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	0	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	32690000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	5013000	USD
CY2017	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	9381000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-13352000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3256000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-30000	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
CY2017	kos	Effective Income Tax Rate Reconciliation Arbitration Settlement Amount EffectiveIncomeTaxRateReconciliationArbitrationSettlementAmount	1736000	USD
CY2019	kos	Effective Income Tax Rate Reconciliation Nondeductible Expense Insurance Premiums EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInsurancePremiums	2625000	USD
CY2018	kos	Effective Income Tax Rate Reconciliation Nondeductible Expense Insurance Premiums EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInsurancePremiums	0	USD
CY2017	kos	Effective Income Tax Rate Reconciliation Nondeductible Expense Insurance Premiums EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInsurancePremiums	0	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
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1680000	USD
CY2017	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	2565000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	3998000	USD
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	0	USD
CY2018	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	-2565000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	656000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	3790000	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
CY2017	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	0	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
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	3086000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	44889000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	63335000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	6008000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	16721000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80894000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43131000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44937000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	3.22
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.85
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.25
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	132100000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	261200000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	164400000	USD
CY2019Q4	kos	Deferred Tax Assets Foreign Capitalized Operating Expenses DeferredTaxAssetsForeignCapitalizedOperatingExpenses	175330000	USD
CY2018Q4	kos	Deferred Tax Assets Foreign Capitalized Operating Expenses DeferredTaxAssetsForeignCapitalizedOperatingExpenses	128809000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	19576000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	28050000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	58903000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	59336000	USD
CY2019Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	15426000	USD
CY2018Q4	us-gaap	Deferred Tax Asset Interest Carryforward DeferredTaxAssetInterestCarryforward	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	13700000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	11408000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	1471000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	0	USD
CY2019Q4	kos	Deferred Tax Assets Asset Retirement Obligation And Other DeferredTaxAssetsAssetRetirementObligationAndOther	43159000	USD
CY2018Q4	kos	Deferred Tax Assets Asset Retirement Obligation And Other DeferredTaxAssetsAssetRetirementObligationAndOther	29450000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	327565000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	257053000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	201749000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	156860000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	125816000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	100193000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	746258000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	547389000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	15979000	USD
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CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	563368000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	620442000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	463175000	USD
CY2019Q4	kos	Operating Loss Carryforwards Foreign OperatingLossCarryforwardsForeign	68800000	USD
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CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4264000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4327000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	3491000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.23
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CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.23
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.57
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	15300000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10600000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	12900000	shares
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	5480000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	15874000	USD
CY2019	us-gaap	Lease Cost LeaseCost	21354000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	20008000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1139000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	22240000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	5082000	USD
CY2019	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	13855000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	16112000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	35774000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	12395000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	23379000	USD
CY2019Q4	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	152490000	USD
CY2018Q4	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	92613000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	4527000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	6617000	USD
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CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	18152000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	103566000	USD
CY2018Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	8958000	USD
CY2019Q4	kos	Accrual For All Other Taxes Current AccrualForAllOtherTaxesCurrent	3375000	USD
CY2018Q4	kos	Accrual For All Other Taxes Current AccrualForAllOtherTaxesCurrent	4613000	USD
CY2019Q4	kos	Derivative Liability Settled Current DerivativeLiabilitySettledCurrent	4837000	USD
CY2018Q4	kos	Derivative Liability Settled Current DerivativeLiabilitySettledCurrent	441000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	32482000	USD
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CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	450000	USD
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CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	195596000	USD
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CY2019	us-gaap	Inventory Write Down InventoryWriteDown	4590000	USD
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CY2019	kos	Gain Loss On Insurance Settlements GainLossOnInsuranceSettlements	3509000	USD
CY2018	kos	Gain Loss On Insurance Settlements GainLossOnInsuranceSettlements	0	USD
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CY2019	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	193000	USD
CY2018	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	0	USD
CY2017	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	0	USD
CY2019	kos	Disputed Partner Charges And Related Expenses DisputedPartnerChargesAndRelatedExpenses	4149000	USD
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CY2019	us-gaap	Restructuring Charges RestructuringCharges	11528000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	0	USD
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CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6501000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-5291000	USD
CY2018Q3	kos	Arbitration Settlement Amount Awarded From Other Party ArbitrationSettlementAmountAwardedFromOtherParty	12900000	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
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CY2019	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	10528000	USD
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CY2019	us-gaap	Exploration Expense ExplorationExpense	180955000	USD
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CY2019	kos	Interest Expense Income Net InterestExpenseIncomeNet	155074000	USD
CY2019	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-71885000	USD
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CY2019	us-gaap	Costs And Expenses CostsAndExpenses	1484792000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25117000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	80894000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-55777000	USD
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CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3642332000	USD
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CY2018	us-gaap	Revenues Revenues	886666000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	7666000	USD
CY2018	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	8037000	USD
CY2018	kos	Revenue And Other Income RevenueAndOtherIncome	902369000	USD
CY2018	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	224727000	USD
CY2018	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	6955000	USD
CY2018	us-gaap	Exploration Expense ExplorationExpense	301492000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	99856000	USD
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CY2018	kos	Interest Expense Income Net InterestExpenseIncomeNet	101176000	USD
CY2018	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	31430000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	72881000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6501000	USD
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	953229000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-50860000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43131000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-93991000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	385434000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3459701000	USD
CY2018Q4	us-gaap	Assets Assets	4088189000	USD
CY2017	us-gaap	Revenues Revenues	578139000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property GainLossOnSaleOfProperty	0	USD
CY2017	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	58697000	USD
CY2017	kos	Revenue And Other Income RevenueAndOtherIncome	636836000	USD
CY2017	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	126850000	USD
CY2017	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	-820000	USD
CY2017	us-gaap	Exploration Expense ExplorationExpense	216050000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	68302000	USD
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CY2017	kos	Interest Expense Income Net InterestExpenseIncomeNet	77595000	USD
CY2017	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-59968000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-6252000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-5291000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	814691000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-177855000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44937000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-222792000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	57432000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2317828000	USD
CY2017	us-gaap	Payments To Acquire Oil And Gas Equipment PaymentsToAcquireOilAndGasEquipment	140495000	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
CY2017	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	2858000	USD
CY2019	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	33717000	USD
CY2018	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	26669000	USD
CY2017	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	-6337000	USD
CY2019	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	93142000	USD
CY2018	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	178293000	USD
CY2017	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	172849000	USD
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	28077000	USD
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	28331000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	30282000	USD
CY2019	kos	Proceeds From Sale Of Oil And Gas Property And Equipment Including Amounts In Other Receivables ProceedsFromSaleOfOilAndGasPropertyAndEquipmentIncludingAmountsInOtherReceivables	16713000	USD
CY2018	kos	Proceeds From Sale Of Oil And Gas Property And Equipment Including Amounts In Other Receivables ProceedsFromSaleOfOilAndGasPropertyAndEquipmentIncludingAmountsInOtherReceivables	13703000	USD
CY2017	kos	Proceeds From Sale Of Oil And Gas Property And Equipment Including Amounts In Other Receivables ProceedsFromSaleOfOilAndGasPropertyAndEquipmentIncludingAmountsInOtherReceivables	222068000	USD
CY2019	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	6654000	USD
CY2018	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	765000	USD
CY2017	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	-83000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	440736000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	385434000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	57432000	USD
CY2019Q1	kos	Revenue And Other Income RevenueAndOtherIncome	296790000	USD
CY2019Q2	kos	Revenue And Other Income RevenueAndOtherIncome	395934000	USD
CY2019Q3	kos	Revenue And Other Income RevenueAndOtherIncome	356970000	USD
CY2019Q4	kos	Revenue And Other Income RevenueAndOtherIncome	460215000	USD
CY2019Q1	us-gaap	Costs And Expenses CostsAndExpenses	358370000	USD
CY2019Q2	us-gaap	Costs And Expenses CostsAndExpenses	346495000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	317435000	USD
CY2019Q4	us-gaap	Costs And Expenses CostsAndExpenses	462492000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-52906000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	16837000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	16065000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	-35773000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.13
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.13
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2018Q1	kos	Revenue And Other Income RevenueAndOtherIncome	127177000	USD
CY2018Q2	kos	Revenue And Other Income RevenueAndOtherIncome	215473000	USD
CY2018Q3	kos	Revenue And Other Income RevenueAndOtherIncome	250219000	USD
CY2018Q4	kos	Revenue And Other Income RevenueAndOtherIncome	309500000	USD
CY2018Q1	us-gaap	Costs And Expenses CostsAndExpenses	201751000	USD
CY2018Q2	us-gaap	Costs And Expenses CostsAndExpenses	364091000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	364912000	USD
CY2018Q4	us-gaap	Costs And Expenses CostsAndExpenses	22475000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-50226000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-103273000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-126057000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	185565000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.13
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.26
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.13
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.26
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43

Files In Submission

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$KOS
Kosmos Energy Ltd. Stock $kos

2019 Q4 Form 10-K Financial Statement

#000150999120000052 Filed on February 25, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS Kosmos Energy Ltd. Stock $kos

2019 Q4 Form 10-K Financial Statement

#000150999120000052 Filed on February 25, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS
Kosmos Energy Ltd. Stock $kos