Percentage of compounded annual returns attained covenant.

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Percentage of units to be vested covenant.

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Share based compensation arrangement by share based payment award equity instruments other than options conversion into common stock shares.

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Share based compensation arrangement by share based payment award equity instruments other than options conversion percentage in cash.

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Share based compensation arrangement by share based payment award equity instruments other than options conversion percentage in stock units.

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Share based compensation arrangement by share based payment award common stock issuable vesting of performance share units percent.

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Termination period.

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Amount of cash distribution paid to unit-holder of limited partnership (LP).

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Employee Benefits Plans and Share-Based Compensation - Additional information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock issuable upon vesting, percentage range of target number of PSUs granted	0.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock issuable upon vesting, percentage range of target number of PSUs granted	200.00%
Performance Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants, vesting period	3 years
Options conversion in common stock shares	1
Share-based compensation expense recognized period	1 year 6 months
Share-based compensation expense unrecognized	$ 7.4
Share-based compensation grant date fair value	$ 5.8	$ 7.4	$ 10.4
Performance Share Units \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock issuable upon vesting, percentage range of target number of PSUs granted	0.00%
Performance Share Units \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares of common stock issuable upon vesting, percentage range of target number of PSUs granted	200.00%
Executive Severance Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Termination period	12 months
Plan termination date	Jul. 11, 2019
Executive Severance Plan \| General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Severance Costs1		$ 0.2	$ 7.8
Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-Based Compensation authorized to grant	5,415,576
Long Term Incentive Plan \| Employees \| Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants, vesting period	3 years
Options conversion in common stock shares	1
Share-based compensation expense recognized period	1 year 9 months 18 days
Share-based compensation expense unrecognized	$ 14.3
Long Term Incentive Plan \| Non-employee Directors \| Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants, vesting period	1 year
Options conversion in common stock shares	1
Share-based compensation expense recognized period	2 months 12 days
Share-based compensation expense unrecognized	$ 0.1
Options conversion percentage in RSUs	60.00%
Options conversion percentage in cash	40.00%
Share-based compensation expense liabilities	$ 0.1
Talos Energy LLC Series B Units \| Series A Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense unrecognized	$ 3.4
Percentage of compounded annual returns attained covenant	8.00%
Talos Energy LLC Series B Units \| Series C Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Distribution paid	$ 0.0
New Talos Energy LLC Series B Units \| New Series B Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants, vesting period	4 years
Distribution paid	$ 102.0
Percentage of units to be vested covenant	80.00%
New Talos Energy LLC Series B Units \| New Series A Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense unrecognized	$ 1.0