Derivative Financial Instruments (Details) bbl in Thousands, BTU in Billions		Jul. 30, 2020 BTU $ / Barrels $ / EnergyContent bbl	Jun. 30, 2020 BTU $ / Barrels $ / EnergyContent bbl
NYMEX Oil Swap Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,361
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			56.43
NYMEX Oil Swap Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			4,397
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			57.03
NYMEX Oil Swap Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			13,467
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			39.65
NYMEX Oil Swap Contract, 2022
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			1,276
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			41.75
NYMEX Oil Swap Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			22,501
NYMEX Oil Collar Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			1,252
Derivative, Weighted-Average Floor Price | $ / Barrels			55.00
Derivative, Weighted-Average Ceiling Price | $ / Barrels			62.90
NYMEX Oil Collar Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			610
Derivative, Weighted-Average Floor Price | $ / Barrels			55.00
Derivative, Weighted-Average Ceiling Price | $ / Barrels			61.90
NYMEX Oil Collar Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			329
Derivative, Weighted-Average Floor Price | $ / Barrels			55.00
Derivative, Weighted-Average Ceiling Price | $ / Barrels			56.70
NYMEX Oil Collar Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			2,191
NYMEX Oil Calendar Month Average Roll Differential Contract Third Quarter, 2020
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,077
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price | $ / Barrels			(1.34)
NYMEX Oil Calendar Month Average Roll Differential Fourth Quarter, 2020
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			2,503
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price | $ / Barrels			(1.18)
NYMEX Oil Calendar Month Average Roll Differential Contract, 2021
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			4,002
Derivative, Roll Differential Swap Type, Weighted-Average Contract Price | $ / Barrels			(0.52)
NYMEX Oil Calendar Month Average Roll Differential Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			9,582
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,607
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		(0.62)
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			4,087
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		(0.38)
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			11,527
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		0.87
WTI Midland NYMEX WTI [Member] | Oil Basis Swap Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			9,500
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[1]		1.15
WTI Midland NYMEX WTI [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			28,721
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			920
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(8.01)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			920
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(8.01)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,650
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(7.86)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			3,650
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels	[2]		(7.78)
NYMEX WTI ICE Brent [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			9,140
IF HSC [Member] | Gas Swaps Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.41
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			4,493
IF HSC [Member] | Gas Swaps Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.39
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			9,327
IF HSC [Member] | Gas Swaps Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.38
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			41,736
IF HSC [Member] | Gas Swaps Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			2.23
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			6,104
IF HSC [Member] | Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU	[3]		61,660
WAHA [Member] | Gas Swaps Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			1.08
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			4,628
WAHA [Member] | Gas Swaps Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			1.21
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			4,872
WAHA [Member] | Gas Swaps Contract, 2021 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			1.52
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			20,676
WAHA [Member] | Gas Swaps Contract, 2022 [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent			1.90
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU			2,681
WAHA [Member] | Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU	[3]		32,857
IF WAHA [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps			71.00%
GD WAHA [Member]
Derivative Financial Instruments
Index percent of natural gas fixed swaps			29.00%
OPIS Propane Mont Belvieu Non-TET [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			875
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Third Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			409
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			22.33
OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contract Fourth Quarter, 2020 [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume			466
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels			22.29
Subsequent Event [Member] | NYMEX Oil Swap Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume		3,700
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels		43.29
Subsequent Event [Member] | WTI Midland NYMEX WTI [Member]
Derivative Financial Instruments
Derivative, Oil Basis Swap Type, Weighted-Average Contract Price | $ / Barrels		0.21
Subsequent Event [Member] | WTI Midland NYMEX WTI [Member] | Oil Basis Swap [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume		2,300
Subsequent Event [Member] | GD WAHA [Member] | Gas Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Swap Type, Weighted-Average Contract Price | $ / EnergyContent		1.99
Derivative, Nonmonetary Notional Amount, Energy Measure | BTU		920
Subsequent Event [Member] | OPIS Propane Mont Belvieu Non-TET [Member] | NGL Swaps Contracts [Member]
Derivative Financial Instruments
Derivative, Nonmonetary Notional Amount, Volume		400
Derivative, Swap Type, Weighted-Average Contract Price | $ / Barrels		19.74

[1] ⁽¹⁾ Represents the price differential between WTI Midland (Midland, Texas) and NYMEX WTI (Cushing, Oklahoma).

[2] ⁽²⁾ Represents the price differential between NYMEX WTI (Cushing, Oklahoma) and ICE Brent (North Sea).

[3] ⁽¹⁾ The Company has natural gas swaps in place that settle against Inside FERC Houston Ship Channel (“IF HSC”), Inside FERC West Texas (“IF WAHA”), and Platt’s Gas Daily West Texas (“GD WAHA”). As of June 30, 2020, WAHA volumes were comprised of 71 percent IF WAHA and 29 percent GD WAHA.