Financial Instruments - Schedule of Contracted Volumes and Weighted Average Prices and will Receive Under the Terms of Derivative Contracts (Details)	12 Months Ended
Dec. 31, 2020 MMBTU $ / bbl $ / MMBTU bbl
Crude Oil \| WTI \| January 2021 – December 2021 \| Swaps
Derivative [Line Items]
Instrument Type	Swaps
Average Daily Volumes \| bbl	22,948
Weighted Average Swap Price \| $ / bbl	43.20
Crude Oil \| WTI \| January 2021 – December 2021 \| Collars
Derivative [Line Items]
Instrument Type	Collars
Average Daily Volumes \| bbl	1,000
Weighted Average Put Price \| $ / bbl	30.00
Weighted Average Call Price \| $ / bbl	40.00
Crude Oil \| WTI \| January 2022 – December 2022 \| Swaps
Derivative [Line Items]
Instrument Type	Swaps
Average Daily Volumes \| bbl	10,616
Weighted Average Swap Price \| $ / bbl	44.45
Crude Oil \| LLS \| January 2021 – December 2021 \| Swaps
Derivative [Line Items]
Instrument Type	Swaps
Average Daily Volumes \| bbl	3,000
Weighted Average Swap Price \| $ / bbl	38.83
Natural Gas \| January 2022 – December 2022 \| Swaps \| NYMEX Henry Hub
Derivative [Line Items]
Instrument Type	Swaps
Weighted Average Swap Price \| $ / MMBTU	2.60
Average Daily Volumes \| MMBTU	29,649
Natural Gas \| January 2021 – December 2021 \| Swaps \| NYMEX Henry Hub
Derivative [Line Items]
Instrument Type	Swaps
Weighted Average Swap Price \| $ / MMBTU	2.56
Average Daily Volumes \| MMBTU	58,907
Natural Gas \| January 2021 – December 2021 \| Collars \| NYMEX Henry Hub
Derivative [Line Items]
Instrument Type	Collars
Weighted Average Put Price \| $ / MMBTU	2.50
Weighted Average Call Price \| $ / MMBTU	3.10
Average Daily Volumes \| MMBTU	5,000
Natural Gas \| January 2023 – June 2023 \| Swaps \| NYMEX Henry Hub
Derivative [Line Items]
Instrument Type	Swaps
Weighted Average Swap Price \| $ / MMBTU	2.61
Average Daily Volumes \| MMBTU	5,000

Derivative Weighted Average Strike Price Call Options.

No definition available.

Name:	talo_DerivativeWeightedAverageStrikePriceCallOptions
Namespace Prefix:	talo_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Derivative Weighted Average Strike Price Put Options.

+ References

No definition available.

+ Details

Name:	talo_DerivativeWeightedAverageStrikePricePutOptions
Namespace Prefix:	talo_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

- Definition

Average variable price rate related to the group of price risk swap derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeSwapTypeAverageVariablePrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Description of the type of derivative instrument, such as a swap, forward, and option. Excludes the underlying risk of the instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579240-113959

+ Details

Name:	us-gaap_DerivativeTypeOfInstrument
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_EnergyAxis=srt_CrudeOilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=talo_WestTexasIntermediateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=talo_JanuaryTwoThousandTwentyOneToDecemberTwoThousandTwentyOneProductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_SwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=talo_CollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=talo_JanuaryTwoThousandAndTwentyTwoToDecemberTwoThousandTwentyTwoProductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=talo_LouisianaLightSweetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_EnergyAxis=srt_NaturalGasPerThousandCubicFeetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_EntityListingsExchangeAxis=talo_NYMEXHenryHubMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=talo_JanuaryTwoThousandAndTwentyOneToDecemberTwoThousandAndTwentyOneProductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=talo_JanuaryTwoThousandAndTwentyThreeToJuneTwoThousandTwentyThreeProductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: