$KOS
Kosmos Energy Ltd. Stock $kos

$kos Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-Q Financial Statement

#000150999119000107 Filed on November 04, 2019

Income Statement

Concept	2019 Q4	2019 Q3	2018 Q3
Revenue	$449.7M	$357.0M	$242.8M
YoY Change	49.2%	47.03%	60.56%
Cost Of Revenue	$136.3M	$95.50M	$55.10M
YoY Change	86.46%	73.32%	40.56%
Gross Profit	$313.4M	$261.5M	$187.8M
YoY Change	37.22%	39.24%	67.53%
Gross Profit Margin	69.69%	73.24%	77.34%
Selling, General & Admin	$21.30M	$24.70M	$26.00M
YoY Change	-38.26%	-5.0%	30.0%
% of Gross Profit	6.8%	9.45%	13.84%
Research & Development	$97.90M	$22.80M	$148.2M
YoY Change	79.3%	-84.62%	300.54%
% of Gross Profit	31.24%	8.72%	78.91%
Depreciation & Amortization	$149.9M	$149.0M	$82.40M
YoY Change	21.38%	80.83%	8.28%
% of Gross Profit	47.83%	56.98%	43.88%
Operating Expenses	$261.0M	$218.5M	$253.5M
YoY Change	32.35%	-13.81%	91.61%
Operating Profit	$52.40M	$43.00M	-$65.70M
YoY Change	67.95%	-165.45%	225.25%
Interest Expense	-$65.20M	-$3.400M	-$56.00M
YoY Change	-126.3%	-93.93%	25.28%
% of Operating Profit	-124.43%	-7.91%
Other Income/Expense, Net	$0.00	-$11.47M	$12.81M
YoY Change	-100.0%	-189.58%	-5596.57%
Pretax Income	-$2.300M	$39.54M	-$114.7M
YoY Change	-100.8%	-134.47%	76.67%
Income Tax	$33.50M	$23.47M	$11.36M
% Of Pretax Income		59.37%
Net Earnings	-$35.77M	$16.07M	-$126.1M
YoY Change	-119.28%	-112.74%	98.81%
Net Earnings / Revenue	-7.95%	4.5%	-51.91%
Basic Earnings Per Share	-$0.09	$0.04	-$0.31
Diluted Earnings Per Share	-$0.09	$0.04	-$0.31
COMMON SHARES
Basic Shares Outstanding	401.5M shares	401.5M shares	404.5M shares
Diluted Shares Outstanding		411.0M shares	404.5M shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$224.5M	$203.6M	$192.6M
YoY Change	29.39%	5.71%	17.3%
Cash & Equivalents	$224.5M	$203.6M	$192.6M
Short-Term Investments
Other Short-Term Assets	$53.40M	$77.10M	$105.7M
YoY Change	-52.02%	-27.06%	29.69%
Inventory	$114.4M	$140.2M	$90.00M
Prepaid Expenses
Receivables	$64.14M	$54.61M	$131.5M
Other Receivables	$28.73M	$20.02M	$15.75M
Total Short-Term Assets	$566.6M	$550.0M	$640.8M
YoY Change	11.15%	-14.16%	36.58%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.642B	$3.799B	$3.510B
YoY Change	5.28%	8.25%	55.4%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$0.00	$0.00	$88.65M
YoY Change	-100.0%	-100.0%	-27.73%
Other Assets	$86.00M	$88.20M	$76.00M
YoY Change	63.5%	16.05%	-35.48%
Total Long-Term Assets	$3.751B	$3.918B	$3.689B
YoY Change	4.81%	6.22%	47.47%
TOTAL ASSETS
Total Short-Term Assets	$566.6M	$550.0M	$640.8M
Total Long-Term Assets	$3.751B	$3.918B	$3.689B
Total Assets	$4.317B	$4.468B	$4.329B
YoY Change	5.6%	3.21%	45.75%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$149.5M	$171.5M	$153.9M
YoY Change	-15.33%	11.42%	53.46%
Accrued Expenses	$380.7M	$292.4M	$262.3M
YoY Change	94.64%	11.48%	50.92%
Deferred Revenue	$32.48M	$33.72M
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	$472.4M	$628.4M
YoY Change	40.28%	-24.83%	121.97%
LONG-TERM LIABILITIES
Long-Term Debt	$2.008B	$2.106B	$2.095B
YoY Change	-5.3%	0.56%	93.88%
Other Long-Term Liabilities	$33.14M	$32.62M	$9.277M
YoY Change	261.8%	251.61%	-6.02%
Total Long-Term Liabilities	$2.936B	$3.105B	$2.766B
YoY Change	6.3%	12.25%	64.84%
TOTAL LIABILITIES
Total Short-Term Liabilities	$539.1M	$472.4M	$628.4M
Total Long-Term Liabilities	$2.936B	$3.105B	$2.766B
Total Liabilities	$3.476B	$3.577B	$3.395B
YoY Change	10.45%	5.38%	73.08%
SHAREHOLDERS EQUITY
Retained Earnings	-$1.223B	-$1.187B	-$1.353B
YoY Change	4.78%	-12.24%	42.23%
Common Stock	$2.302B	$2.315B	$2.336B
YoY Change	-1.88%	-0.91%	16.32%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$237.0M	$237.0M	$48.71M
YoY Change	0.0%	386.6%	1.06%
Treasury Stock Shares	44.26M shares	44.26M shares	9.263M shares
Shareholders Equity	$841.7M	$891.0M	$934.9M
YoY Change
Total Liabilities & Shareholders Equity	$4.317B	$4.468B	$4.329B
YoY Change	5.6%	3.21%	45.75%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2018 Q3
OPERATING ACTIVITIES
Net Income	-$35.77M	$16.07M	-$126.1M
YoY Change	-119.28%	-112.74%	98.81%
Depreciation, Depletion And Amortization	$149.9M	$149.0M	$82.40M
YoY Change	21.38%	80.83%	8.28%
Cash From Operating Activities	$227.9M	$177.9M	$89.80M
YoY Change	33.82%	98.11%	-19.75%
INVESTING ACTIVITIES
Capital Expenditures	-$103.1M	-$90.40M	-$1.019B
YoY Change	49.64%	-91.13%	1654.04%
Acquisitions
YoY Change
Other Investing Activities	$7.700M	-$13.60M	$76.30M
YoY Change	-81.71%	-117.82%
Cash From Investing Activities	-$95.40M	-$104.0M	-$942.8M
YoY Change	255.97%	-88.97%	1522.72%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-118.2M	-43.60M	914.0M
YoY Change	-28.49%	-104.77%	-1920.72%
NET CHANGE
Cash From Operating Activities	227.9M	177.9M	89.80M
Cash From Investing Activities	-95.40M	-104.0M	-942.8M
Cash From Financing Activities	-118.2M	-43.60M	914.0M
Net Change In Cash	14.30M	30.30M	61.00M
YoY Change	-165.6%	-50.33%	1594.44%
FREE CASH FLOW
Cash From Operating Activities	$227.9M	$177.9M	$89.80M
Capital Expenditures	-$103.1M	-$90.40M	-$1.019B
Free Cash Flow	$331.0M	$268.3M	$1.109B
YoY Change	38.38%	-75.8%	552.29%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Entity Central Index Key EntityCentralIndexKey	0001509991
	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	-107300000	USD
	kos	Cash Settlements On Commodity Derivatives CashSettlementsOnCommodityDerivatives	-27000000	USD
CY2018Q4	us-gaap	Accumulated Amortization Of Noncurrent Deferred Finance Costs AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts	12065000	USD
CY2019Q3	us-gaap	Accumulated Amortization Of Noncurrent Deferred Finance Costs AccumulatedAmortizationOfNoncurrentDeferredFinanceCosts	14027000	USD
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0452
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0452
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	442914675	shares
CY2019Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	445757319	shares
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2019Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	200000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	44263269	shares
CY2019Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	44263269	shares
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-09-30
	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
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CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-11472000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	12807000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-11798000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	8164000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	317435000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	364912000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1022300000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	930754000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	39535000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-114693000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23470000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11364000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	47398000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-58329000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	16065000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-126057000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-20004000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-279556000	USD
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.05
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.70
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.05
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.70
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	401466000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	404536000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	401319000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	399026000	shares
CY2018Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8392000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	891030000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	897112000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	410992000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	404536000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	401319000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	399026000	shares
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0452
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.1356
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	941478000	USD
CY2019Q1	us-gaap	Dividends Dividends	18744000	USD
CY2019Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8744000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2019Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1979000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-52906000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	876593000	USD
CY2019Q2	us-gaap	Dividends Dividends	18740000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9525000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2019Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	16837000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	884211000	USD
CY2019Q3	us-gaap	Dividends Dividends	18753000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9507000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	16065000	USD
CY2018Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	11874000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-50226000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	843404000	USD
CY2018Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9821000	USD
CY2018Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	5821000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-103273000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	744131000	USD
CY2018Q3	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	307944000	USD
CY2018Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8915000	USD
CY2018Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-126057000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	934933000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-20004000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-279556000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	423160000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	215676000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-69840000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-84095000	USD
	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	7361000	USD
	us-gaap	Exploration Abandonment And Impairment Expense ExplorationAbandonmentAndImpairmentExpense	114948000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-34003000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-232057000	USD
	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	-24701000	USD
	kos	Cash Settlements On Derivatives CashSettlementsOnDerivatives	-102705000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	27382000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	25975000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7666000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-24794000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4324000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	5235000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-9600000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1237000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-12886000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-59318000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	51943000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-3978000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-23512000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	9732000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-61909000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-15178000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	65975000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-73569000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	400276000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	90247000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	240642000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	149305000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	8291000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	3560000	USD
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	0	USD
	us-gaap	Payments To Acquire Oil And Gas Property PaymentsToAcquireOilAndGasProperty	961764000	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	142628000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	0	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	13703000	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	19565000	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-268498000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-958298000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	175000000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1000000000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	325000000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	175000000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	641875000	USD
	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	535338000	USD
	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
	kos	Payments For Repurchase Of Common Stock Used To Cover Employee Taxes PaymentsForRepurchaseOfCommonStockUsedToCoverEmployeeTaxes	1983000	USD
	kos	Payments For Repurchase Of Common Stock Used To Cover Employee Taxes PaymentsForRepurchaseOfCommonStockUsedToCoverEmployeeTaxes	17695000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	54447000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	0	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2443000	USD
	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	36745000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-102336000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	770560000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	29442000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-97491000	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
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	215058000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	207495000	USD
	us-gaap	Interest Paid Net InterestPaidNet	78691000	USD
	us-gaap	Interest Paid Net InterestPaidNet	86981000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	27768000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	25601000	USD
	us-gaap	Stock Issued1 StockIssued1	0	USD
	us-gaap	Stock Issued1 StockIssued1	307944000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	185616000	USD
	us-gaap	Nature Of Operations NatureOfOperations	Organization<div style="line-height:120%;text-indent:84px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </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 Energy Ltd. changed its jurisdiction of incorporation from Bermuda to the State of Delaware, in the United States of America, (the "Redomestication") in December 2018. 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%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Kosmos is </span><span style="font-family:inherit;font-size:10pt;">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 New York Stock Exchange and London Stock Exchange and is traded under the ticker symbol KOS.</span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">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 </span><span style="font-family:inherit;font-size:10pt;"><span>four</span></span><span style="font-family:inherit;font-size:10pt;"> geographic areas: Ghana, Equatorial Guinea, Mauritania/Senegal and U.S. Gulf of Mexico. In addition, we have exploration activities in other countries in the Atlantic Margins.</span></div>
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;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%;text-align:justify;text-indent:84px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div><div style="line-height:120%;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 presentation. Such reclassifications had no significant impact on our reported net </span><span style="font-family:inherit;font-size:10pt;">income (loss)</span><span style="font-family:inherit;font-size:10pt;">, current assets, total assets, current liabilities, total liabilities, stockholders’ equity or cash flows. Additionally, as a result of our outstanding shares in KTIPI being transferred for an undivided interest in the Ceiba Field and Okume Complex (effective January 1, 2019), our previously reported equity method investment in KTIPI has been allocated to the respective assets and liabilities on a relative fair value basis. See Note 7 — Equity Method Investments for additional information. </span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	203646000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	173515000	USD
CY2019Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	7745000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	4527000	USD
CY2019Q3	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	3667000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	7574000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	215058000	USD
CY2019Q3	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	123600000	USD
CY2018Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	83400000	USD
CY2019Q3	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	16600000	USD
CY2018Q4	us-gaap	Energy Related Inventory Petroleum EnergyRelatedInventoryPetroleum	1400000	USD
	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-weight:bold;">Concentration of Credit Risk</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></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	kos	Number Of Companies In Alliance NumberOfCompaniesInAlliance	2	company
CY2019Q3	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	4827304000	USD
CY2018Q4	us-gaap	Proved Oil And Gas Property Successful Effort Method ProvedOilAndGasPropertySuccessfulEffortMethod	4236489000	USD
CY2019Q3	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	898855000	USD
CY2018Q4	us-gaap	Unproved Oil And Gas Property Successful Effort Method UnprovedOilAndGasPropertySuccessfulEffortMethod	759472000	USD
CY2019Q3	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	5726159000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Gross OilAndGasPropertySuccessfulEffortMethodGross	4995961000	USD
CY2019Q3	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	1945170000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Accumulated Depreciation Depletion And Amortization OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization	1551097000	USD
CY2019Q3	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3780989000	USD
CY2019Q3	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	412198000	USD
CY2018Q4	us-gaap	Oil And Gas Property Successful Effort Method Net OilAndGasPropertySuccessfulEffortMethodNet	3444864000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	59515000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	51987000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	41468000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other Accumulated Depreciation PropertyPlantAndEquipmentOtherAccumulatedDepreciation	37150000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	18047000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Other Net PropertyPlantAndEquipmentOtherNet	14837000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3799036000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3459701000	USD
CY2019Q3	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	139100000	USD
CY2018Q3	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	76800000	USD
	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	394100000	USD
	us-gaap	Depletion Of Oil And Gas Properties DepletionOfOilAndGasProperties	199700000	USD
	kos	Capitalized Exploratory Well Cost Expensed In Same Period CapitalizedExploratoryWellCostExpensedInSamePeriod	1400000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	367665000	USD
	us-gaap	Capitalized Exploratory Well Cost Additions Pending Determination Of Proved Reserves CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves	55244000	USD
	us-gaap	Reclassification To Well Facilities And Equipment Based On Determination Of Proved Reserves ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves	10711000	USD
	us-gaap	Capitalized Exploratory Well Cost Charged To Expense1 CapitalizedExploratoryWellCostChargedToExpense1	0	USD
CY2019Q3	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	412198000	USD
CY2019Q3	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	0	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs That Have Been Capitalized For Period Of One Year Or Less CapitalizedExploratoryWellCostsThatHaveBeenCapitalizedForPeriodOfOneYearOrLess	0	USD
CY2019Q3	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears	77995000	USD
CY2018Q4	kos	Capitalized Exploratory Well Costs Greater Than Or Equal To One Year And Less Than Three Years CapitalizedExploratoryWellCostsGreaterThanOrEqualToOneYearAndLessThanThreeYears	299253000	USD
CY2019Q3	kos	Capitalizedexploratorywellcostsgreaterthanorequaltothreeyearsandlessthanfouryears Capitalizedexploratorywellcostsgreaterthanorequaltothreeyearsandlessthanfouryears	334203000	USD
CY2018Q4	kos	Capitalizedexploratorywellcostsgreaterthanorequaltothreeyearsandlessthanfouryears Capitalizedexploratorywellcostsgreaterthanorequaltothreeyearsandlessthanfouryears	68412000	USD
CY2018Q4	us-gaap	Capitalized Exploratory Well Costs CapitalizedExploratoryWellCosts	367665000	USD
CY2019Q3	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
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	51896000	USD
CY2019Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2150000000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2175000000	USD
CY2019Q3	kos	Debt Instrument Unamortized Issuance Costs And Discounts DebtInstrumentUnamortizedIssuanceCostsAndDiscounts	43798000	USD
CY2018Q4	kos	Debt Instrument Unamortized Issuance Costs And Discounts DebtInstrumentUnamortizedIssuanceCostsAndDiscounts	54453000	USD
CY2019Q3	us-gaap	Long Term Debt LongTermDebt	2106202000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	2120547000	USD
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	21209000	USD
CY2019Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	2150000000	USD
CY2019Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	0	USD
CY2019Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2019Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	274800000	USD
CY2019Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	284200000	USD
CY2019Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	271600000	USD
CY2019Q3	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1319400000	USD
CY2019Q3	us-gaap	Interest Costs Incurred InterestCostsIncurred	34944000	USD
CY2018Q3	us-gaap	Interest Costs Incurred InterestCostsIncurred	27317000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	111566000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	77121000	USD
CY2019Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2285000	USD
CY2018Q3	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2346000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	6974000	USD
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	7069000	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-268000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-24794000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4324000	USD
CY2019Q3	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	7077000	USD
CY2018Q3	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	7097000	USD
	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	21330000	USD
CY2019Q3	kos	Deferred Interest DeferredInterest	290000	USD
CY2018Q3	kos	Deferred Interest DeferredInterest	-194000	USD
	kos	Deferred Interest DeferredInterest	1559000	USD
	kos	Deferred Interest DeferredInterest	-1284000	USD
CY2019Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	972000	USD
CY2018Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	788000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2215000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2579000	USD
CY2019Q3	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	1251000	USD
CY2018Q3	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	1697000	USD
	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	4217000	USD
	kos	Interest And Other Financing Costs Other Net InterestAndOtherFinancingCostsOtherNet	4671000	USD
CY2019Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	30721000	USD
CY2018Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	23549000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	125565000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	68113000	USD
CY2019Q3	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	31683000	USD
CY2018Q3	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-54267000	USD
	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-34003000	USD
	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-232057000	USD
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	410992000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	404536000	shares
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27394000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	39535000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-114693000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-337885000	USD
CY2019Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.59
CY2018Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.10
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	1.73
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.17
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	16065000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-126057000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-20004000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-279556000	USD
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	401466000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	404536000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	401319000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	399026000	shares
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	9526000	shares
CY2018Q3	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	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	401319000	shares
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1547000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	2239000	USD
	us-gaap	Lease Cost LeaseCost	5835000	USD
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	399026000	shares
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.05
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.70
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.05
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.70
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	700000	shares
CY2018Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	13100000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	15400000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14500000	shares
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	1279000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	4288000	USD
CY2019Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	960000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	20436000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1294000	USD
CY2019Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	22480000	USD
CY2019Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y1M6D
CY2019Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.098
	us-gaap	Operating Lease Payments OperatingLeasePayments	3077000	USD
CY2018Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	8958000	USD
CY2019Q3	kos	Accrual For All Other Taxes Current AccrualForAllOtherTaxesCurrent	2060000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	483000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	4098000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4148000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4199000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4249000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	19480000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	36657000	USD
CY2019Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	12883000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	23774000	USD
CY2019Q3	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	114833000	USD
CY2018Q4	kos	Accrued Exploration Development And Production Costs Current AccruedExplorationDevelopmentAndProductionCostsCurrent	92613000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	33721000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	24379000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	5844000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	6617000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	1294000	USD
CY2019Q3	kos	Accrued General And Administrative Expenses Current AccruedGeneralAndAdministrativeExpensesCurrent	31913000	USD
CY2018Q4	kos	Accrued General And Administrative Expenses Current AccruedGeneralAndAdministrativeExpensesCurrent	39373000	USD
CY2019Q3	us-gaap	Interest Payable Current InterestPayableCurrent	27913000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	18152000	USD
CY2019Q3	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	69938000	USD
CY2019Q3	us-gaap	Asset Retirement Obligation AssetRetirementObligation	290370000	USD
CY2018Q4	kos	Accrual For All Other Taxes Current AccrualForAllOtherTaxesCurrent	4613000	USD
CY2019Q3	kos	Derivative Liability Settled Current DerivativeLiabilitySettledCurrent	2975000	USD
CY2018Q4	kos	Derivative Liability Settled Current DerivativeLiabilitySettledCurrent	441000	USD
CY2019Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1928000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	450000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	292419000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	195596000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	151953000	USD
	kos	Asset Retirement Obligation Business Combination AssetRetirementObligationBusinessCombination	114395000	USD
	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	9706000	USD
	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	4384000	USD
	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	905000	USD
	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	17795000	USD
CY2019Q3	kos	Facilities Insurance Modifications Expenditures FacilitiesInsuranceModificationsExpenditures	12600000	USD
CY2018Q3	kos	Facilities Insurance Modifications Expenditures FacilitiesInsuranceModificationsExpenditures	12300000	USD
	kos	Facilities Insurance Modifications Expenditures FacilitiesInsuranceModificationsExpenditures	34800000	USD
	kos	Facilities Insurance Modifications Expenditures FacilitiesInsuranceModificationsExpenditures	31500000	USD
	kos	Facilities Insurance Modifications Insurance Recoveries FacilitiesInsuranceModificationsInsuranceRecoveries	40000000.0	USD
	kos	Facilities Insurance Modifications Insurance Recoveries FacilitiesInsuranceModificationsInsuranceRecoveries	9700000	USD
CY2019Q3	us-gaap	Inventory Write Down InventoryWriteDown	1232000	USD
CY2018Q3	us-gaap	Inventory Write Down InventoryWriteDown	-2000	USD
	us-gaap	Inventory Write Down InventoryWriteDown	1419000	USD
	us-gaap	Inventory Write Down InventoryWriteDown	-26000	USD
CY2019Q3	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	-746000	USD
CY2018Q3	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	0	USD
	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	1167000	USD
	kos	Loss On Asset Retirement Obligation Liabilities Settled LossOnAssetRetirementObligationLiabilitiesSettled	0	USD
CY2019Q3	kos	Disputed Partner Charges And Related Expenses DisputedPartnerChargesAndRelatedExpenses	1677000	USD
CY2018Q3	kos	Disputed Partner Charges And Related Expenses DisputedPartnerChargesAndRelatedExpenses	-12682000	USD
	kos	Disputed Partner Charges And Related Expenses DisputedPartnerChargesAndRelatedExpenses	1663000	USD
	kos	Disputed Partner Charges And Related Expenses DisputedPartnerChargesAndRelatedExpenses	-9721000	USD
CY2019Q3	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-9309000	USD
CY2018Q3	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	123000	USD
	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-7549000	USD
	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-1583000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-11472000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	12807000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-11798000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	8164000	USD
CY2018Q3	kos	Payments For Tax Settlements PaymentsForTaxSettlements	8700000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	segment
CY2019Q3	us-gaap	Revenues Revenues	357036000	USD
CY2019Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-66000	USD
CY2019Q3	kos	Revenue And Other Income RevenueAndOtherIncome	356970000	USD
CY2019Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	95540000	USD
CY2019Q3	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	12569000	USD
CY2019Q3	us-gaap	Exploration Expense ExplorationExpense	22773000	USD
CY2019Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	24723000	USD
CY2019Q3	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	146653000	USD
CY2019Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	30721000	USD
CY2019Q3	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	27016000	USD
CY2019Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-11472000	USD
CY2019Q3	us-gaap	Costs And Expenses CostsAndExpenses	317435000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	39535000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23470000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	16065000	USD
CY2019Q3	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	107393000	USD
	us-gaap	Revenues Revenues	1049759000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-65000	USD
	kos	Revenue And Other Income RevenueAndOtherIncome	1049694000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	266316000	USD
	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	-5174000	USD
	us-gaap	Exploration Expense ExplorationExpense	83022000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	88703000	USD
CY2018Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	25963000	USD
CY2018Q3	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	80041000	USD
CY2018Q3	kos	Interest Expense Income Net InterestExpenseIncomeNet	23549000	USD
CY2018Q3	us-gaap	Exploration Expense ExplorationExpense	148238000	USD
	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	416186000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	125565000	USD
	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-35884000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-11798000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1022300000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27394000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	47398000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-20004000	USD
	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	318306000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3799036000	USD
CY2019Q3	us-gaap	Assets Assets	4468259000	USD
CY2018Q3	us-gaap	Revenues Revenues	242833000	USD
CY2018Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7666000	USD
CY2018Q3	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-280000	USD
CY2018Q3	kos	Revenue And Other Income RevenueAndOtherIncome	250219000	USD
CY2018Q3	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	55078000	USD
CY2018Q3	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	12334000	USD
CY2018Q3	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-57357000	USD
CY2018Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	24841000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	12807000	USD
CY2018Q3	us-gaap	Costs And Expenses CostsAndExpenses	364912000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-114693000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11364000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-126057000	USD
CY2018Q3	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	109191000	USD
	us-gaap	Revenues Revenues	585220000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7666000	USD
	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-17000	USD
	kos	Revenue And Other Income RevenueAndOtherIncome	592869000	USD
	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	151661000	USD
	kos	Facilities Insurance Modifications Expense Income FacilitiesInsuranceModificationsExpenseIncome	21812000	USD
	us-gaap	Exploration Expense ExplorationExpense	246912000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	65343000	USD
	us-gaap	Results Of Operations Depreciation Depletion Amortization And Accretion ResultsOfOperationsDepreciationDepletionAmortizationAndAccretion	208607000	USD
	kos	Interest Expense Income Net InterestExpenseIncomeNet	68113000	USD
	kos	Gain Loss On Commodity Derivative Instruments Net Pretax GainLossOnCommodityDerivativeInstrumentsNetPretax	-236107000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	59637000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	8164000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	930754000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-337885000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-58329000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-279556000	USD
	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	263993000	USD
CY2018Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3509537000	USD
CY2018Q3	us-gaap	Assets Assets	4329464000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	240642000	USD
	us-gaap	Payments To Acquire Oil And Gas Property And Equipment PaymentsToAcquireOilAndGasPropertyAndEquipment	149305000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	8291000	USD
	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	3560000	USD
	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	11083000	USD
	kos	Increase Decrease In Capital Accruals IncreaseDecreaseInCapitalAccruals	13965000	USD
	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	75661000	USD
	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	131964000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	21330000	USD
	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	21209000	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	0	USD
	us-gaap	Proceeds From Sale Of Oil And Gas Property And Equipment ProceedsFromSaleOfOilAndGasPropertyAndEquipment	13703000	USD
	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	3959000	USD
	kos	Other Capital Expenditure Expense OtherCapitalExpenditureExpense	111000	USD
	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	318306000	USD
	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	263993000	USD

Files In Submission

Name	View Source	Status
0001509991-19-000107-index-headers.html	Edgar Link	pending
0001509991-19-000107-index.html	Edgar Link	pending
0001509991-19-000107.txt	Edgar Link	pending
0001509991-19-000107-xbrl.zip	Edgar Link	pending
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exhibit101-southafrica.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
kos-20190930.xsd	Edgar Link	pending
kos-20190930_cal.xml	Edgar Link	unprocessable
kos-20190930_def.xml	Edgar Link	unprocessable
kos-20190930_lab.xml	Edgar Link	unprocessable
kos-20190930_pre.xml	Edgar Link	unprocessable
kos-9302019x10q.htm	Edgar Link	pending
kos-9302019x10q_htm.xml	Edgar Link	completed
kos-9302019xex311.htm	Edgar Link	pending
kos-9302019xex312.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
southafricaeapicturea01.jpg	Edgar Link	pending

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$KOS
Kosmos Energy Ltd. Stock $kos

2019 Q4 Form 10-Q Financial Statement

#000150999119000107 Filed on November 04, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS Kosmos Energy Ltd. Stock $kos

2019 Q4 Form 10-Q Financial Statement

#000150999119000107 Filed on November 04, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KOS
Kosmos Energy Ltd. Stock $kos