Derivatives and Risk Management (Schedule of Derivative Instruments Notional Amount, Weighted Average Contract Prices and Fair Value) (Details) bbl in Thousands, Mcf in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) $ / bbl $ / MMBTU bbl Mcf
Financial protection on production - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	938
Fair Value	$ (1,062)
Financial protection on production - 2023 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	2,349
Fair Value	$ (50)
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	504
Average price per MMBtu and Bbls | $ / MMBTU	3.08
Fair Value	$ (581)
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	1,081
Average price per MMBtu and Bbls | $ / bbl	60.05
Fair Value	$ (20)
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Ethane
Derivative [Line Items]
Volume | bbl	3,810
Average price per MMBtu and Bbls | $ / bbl	12.52
Fair Value	$ 3
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Propane
Derivative [Line Items]
Volume | bbl	3,100
Average price per MMBtu and Bbls | $ / bbl	35.95
Fair Value	$ 9
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Normal Butane
Derivative [Line Items]
Volume | bbl	347
Average price per MMBtu and Bbls | $ / bbl	41.24
Fair Value	$ 1
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Natural Gasoline
Derivative [Line Items]
Volume | bbl	359
Average price per MMBtu and Bbls | $ / bbl	66.00
Fair Value	$ 0
Two-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	219
Floor price per MMBtu and Bbls | $ / MMBTU	3.03
Cap price per MMBtu and Bbls | $ / MMBTU	3.55
Fair Value	$ (188)
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	215
Cap price per MMBtu and Bbls | $ / MMBTU	3.00
Fair Value	$ (293)
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas | Sold
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	2.09
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	2.54
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	1,268
Cap price per MMBtu and Bbls | $ / bbl	56.12
Fair Value	$ (30)
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil | Sold
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / bbl	33.97
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / bbl	45.51
Financial protection on production - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	378
Fair Value	$ (308)
Fixed Price Swaps - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	318
Average price per MMBtu and Bbls | $ / MMBTU	3.37
Fair Value	$ (253)
Fixed Price Swaps - 2024 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	913
Average price per MMBtu and Bbls | $ / bbl	70.66
Fair Value	$ (3)
Fixed Price Swaps - 2024 | Not Designated as Hedging Instrument | Ethane
Derivative [Line Items]
Volume | bbl	420
Average price per MMBtu and Bbls | $ / bbl	12.03
Fair Value	$ 1
Fixed Price Swaps - 2024 | Not Designated as Hedging Instrument | Propane
Derivative [Line Items]
Volume | bbl	566
Average price per MMBtu and Bbls | $ / bbl	35.94
Fair Value	$ 1
Two-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	49
Floor price per MMBtu and Bbls | $ / MMBTU	3.17
Cap price per MMBtu and Bbls | $ / MMBTU	3.91
Fair Value	$ (38)
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	11
Cap price per MMBtu and Bbls | $ / MMBTU	3.54
Fair Value	$ (17)
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas | Sold
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	2.25
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	2.80
Fixed price swaps - 2025 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	41
Average price per MMBtu and Bbls | $ / bbl	77.66
Fair Value	$ 0
Basis swaps | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	336
Fair Value	$ 11
Basis Swaps - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	281
Basis Differential | $ / MMBTU	(0.50)
Fair Value	$ (5)
Basis Swaps - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	46
Basis Differential | $ / MMBTU	(0.71)
Fair Value	$ 13
Basis Swaps - 2025 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	9
Basis Differential | $ / MMBTU	(0.64)
Fair Value	$ 3
Call options | Natural Gas
Derivative [Line Items]
Volume | Mcf	55
Fair Value	$ (88)
Call Option - 2023 | Natural Gas
Derivative [Line Items]
Volume | Mcf	46
Cap price per MMBtu and Bbls | $ / MMBTU	2.94
Fair Value	$ (70)
Call Option - 2024 | Natural Gas
Derivative [Line Items]
Volume | Mcf	9
Cap price per MMBtu and Bbls | $ / MMBTU	3.00
Fair Value	$ (18)
Put Option - 2024 | Natural Gas
Derivative [Line Items]
Volume | Mcf	5
Cap price per MMBtu and Bbls | $ / MMBTU	4.00
Fair Value	$ 4