Derivative Financial Instruments (Details) bbl in Thousands, BTU in Billions	Jul. 29, 2021 $ / Barrels bbl	Jun. 30, 2021 BTU $ / Barrels $ / EnergyContent bbl
NYMEX Oil Swap Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		5,363
Derivative, Swap Type, Weighted-Average Contract Price		41.16
NYMEX Oil Swap Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		4,744
Derivative, Swap Type, Weighted-Average Contract Price		39.85
NYMEX Oil Swap Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		7,823
Derivative, Swap Type, Weighted-Average Contract Price		44.69
NYMEX Oil Swap Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,190
Derivative, Swap Type, Weighted-Average Contract Price		45.20
NYMEX Oil Collar Contract, Third Quarter 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Weighted-Average Floor Price		0
Derivative, Weighted-Average Ceiling Price		0
NYMEX Oil Collar Contract, Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Weighted-Average Floor Price		0
Derivative, Weighted-Average Ceiling Price		0
NYMEX Oil Collar Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,721
Derivative, Weighted-Average Floor Price		51.84
Derivative, Weighted-Average Ceiling Price		58.37
NYMEX Oil Collar Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Weighted-Average Floor Price		0
Derivative, Weighted-Average Ceiling Price		0
NYMEX Oil Calendar Month Average Roll Differential Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		4,326
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price		(0.18)
NYMEX Oil Calendar Month Average Roll Differential Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		3,831
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price		(0.16)
NYMEX Oil Calendar Month Average Roll Differential Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		11,278
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price		0.11
NYMEX Oil Calendar Month Average Roll Differential Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,832
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price		0.39
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		3,756
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		0.75
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		3,824
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		0.71
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		9,500
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		1.15
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		0
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		920
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		(7.86)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		920
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		(7.86)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		3,650
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		(7.78)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		0
WTI Houston MEH NYMEX WTI | Oil Basis Swap Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		356
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		0.60
WTI Houston MEH NYMEX WTI | Oil Basis Swap Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		466
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		0.60
WTI Houston MEH NYMEX WTI | Oil Basis Swap Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		1,329
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		1.25
WTI Houston MEH NYMEX WTI | Oil Basis Swap Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price		0
IF HSC [Member] | Gas Swaps Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		12,575
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		2.40
IF HSC [Member] | Gas Swaps Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		12,412
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		2.41
IF HSC [Member] | Gas Swaps Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		28,932
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		2.52
IF HSC [Member] | Gas Swaps Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		0
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		0
WAHA [Member] | Gas Swaps Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		8,086
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		1.88
WAHA [Member] | Gas Swaps Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		7,627
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		1.82
WAHA [Member] | Gas Swaps Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		14,087
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		2.32
WAHA [Member] | Gas Swaps Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		0
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		0
IF Tenn TX Z0 | Gas Swaps Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		0
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		0
IF Tenn TX Z0 | Gas Swaps Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		0
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		0
IF Tenn TX Z0 | Gas Swaps Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		513
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		3.22
IF Tenn TX Z0 | Gas Swaps Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		0
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		0
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		854
Derivative, Swap Type, Weighted-Average Contract Price		22.16
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		824
Derivative, Swap Type, Weighted-Average Contract Price		22.15
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		461
Derivative, Swap Type, Weighted-Average Contract Price		27.19
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Swap Type, Weighted-Average Contract Price		0
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Collar Contract, Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Weighted-Average Floor Price		0
Derivative, Weighted-Average Ceiling Price		0
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Collar Contract, Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Weighted-Average Floor Price		0
Derivative, Weighted-Average Ceiling Price		0
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Collar Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		627
Derivative, Weighted-Average Floor Price		23.83
Derivative, Weighted-Average Ceiling Price		29.19
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Collar Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Weighted-Average Floor Price		0
Derivative, Weighted-Average Ceiling Price		0
OPIS Normal Butane Mont Belvieu | NGL Swaps Contract Third Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		37
Derivative, Swap Type, Weighted-Average Contract Price		30.87
OPIS Normal Butane Mont Belvieu | NGL Swaps Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		36
Derivative, Swap Type, Weighted-Average Contract Price		30.87
OPIS Normal Butane Mont Belvieu | NGL Swaps Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Swap Type, Weighted-Average Contract Price		0
OPIS Normal Butane Mont Belvieu | NGL Swaps Contract, 2023
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl		0
Derivative, Swap Type, Weighted-Average Contract Price		0
IF WAHA [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps		70.00%
GD WAHA [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps		30.00%
Subsequent Event [Member] | NYMEX Oil Swap Contract Fourth Quarter, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl	400
Derivative, Swap Type, Weighted-Average Contract Price	70.09
Subsequent Event [Member] | OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume | bbl	100
Derivative, Swap Type, Weighted-Average Contract Price	35.70