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Employee Benefits Plans and Share-Based Compensation - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	May 21, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense		$ 1,000,000	$ 300,000	$ 2,500,000	$ 800,000
Capitalized costs, Oil and natural gas properties		$ 500,000	300,000	$ 3,000,000	800,000
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock issuable upon vesting, percentage range of PSUs granted				0.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock issuable upon vesting, percentage range of PSUs granted				200.00%
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants				139,411
Performance Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants		232,891		232,891
Share-based compensation grant date fair value		$ 10,400,000		$ 10,400,000
Options conversion in common stock shares		100.00%
Share-based compensation expense				$ 200,000
Share-based compensation expense recognized period				2 years 7 months 6 days
Share based compensation grants, vesting period				3 years
Capitalized costs, Oil and natural gas properties		$ 200,000		$ 200,000
Share-based compensation expense unrecognized		$ 10,000,000		$ 10,000,000
Performance Share Units \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock issuable upon vesting, percentage range of PSUs granted		0.00%
Performance Share Units \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of common stock issuable upon vesting, percentage range of PSUs granted		200.00%
Executive Severance Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Termination period				12 months
Compensation expense accrued		$ 1,700,000		$ 1,700,000
Executive Severance Plan \| General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense recognized		$ 0		$ 7,500,000
Long Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-Based Compensation authorized to grant		5,415,576		5,415,576
Long Term Incentive Plan \| Restricted Stock Units \| Non-employee Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants	22,963
Share-based compensation grant date fair value	$ 800,000
Options conversion percentage in RSUs				60.00%
Options conversion in common stock shares				100.00%
Options conversion percentage in cash				40.00%
Share-based compensation expense		$ 200,000		$ 300,000
Share-based compensation expense recognized period				7 months 6 days
Share-based compensation expense unrecognized		$ 500,000		$ 500,000
Share-based compensation expense liabilities				200,000
Long Term Incentive Plan \| Restricted Stock Units \| Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation grants		116,448
Share-based compensation grant date fair value		$ 3,900,000		3,900,000
Options conversion in common stock shares		100.00%
Share-based compensation expense				$ 100,000
Share-based compensation expense recognized period				2 years 7 months 6 days
Share-based compensation expense unrecognized		$ 3,700,000		$ 3,700,000
Share based compensation grants, vesting period				3 years
Capitalized costs, Oil and natural gas properties		100,000		$ 100,000
Talos Energy LLC Series B Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Capitalized costs, Oil and natural gas properties		100,000	300,000	$ 300,000	800,000
Talos Energy LLC Series B Units \| Series A Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
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				$ 25,000,000
Talos Energy LLC Series B Units \| Series B Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense recognized period				1 year 8 months 12 days
Share-based compensation expense unrecognized		2,700,000		$ 2,700,000
Unrecognized compensation expense to be recognized over remainder of requisite service period		500,000		$ 500,000
Requisite service period				4 years
Unrecognized compensation expense to be recognized upon recoganization of Series A payout		2,200,000		$ 2,200,000
Talos Energy LLC Series B Units \| General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense		400,000	300,000	600,000	800,000
New Talos Energy LLC Series B Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense unrecognized		2,300,000		2,300,000
Capitalized costs, Oil and natural gas properties		100,000	$ 0	2,400,000	$ 0
Unrecognized compensation expense to be recognized over remainder of requisite service period		200,000		$ 200,000
Requisite service period				4 years
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				$ 102,000,000
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 recognized period				11 months
Unrecognized compensation expense to be recognized upon recoganization of Series A payout		2,100,000		$ 2,100,000
New Talos Energy LLC Series B Units \| General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense		$ 100,000		$ 1,300,000