Derivatives and Risk Management (Schedule of Derivative Instruments Notional Amount, Weighted Average Contract Prices and Fair Value) (Details) bbl in Thousands, Mcf in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) $ / bbl $ / MMBTU Mcf bbl
Financial protection on production - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	660,000
Fair Value	$ 505
Financial protection on production - 2023 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	2,175
Fair Value	$ 1
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	528,000
Average price per MMBtu and Bbls | $ / MMBTU	3.54
Fair Value	$ 448
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	1,571
Average price per MMBtu and Bbls | $ / bbl	71.06
Fair Value	$ (1)
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Ethane
Derivative [Line Items]
Volume | bbl	4,897
Average price per MMBtu and Bbls | $ / bbl	10.61
Fair Value	$ 9
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Propane
Derivative [Line Items]
Volume | bbl	4,008
Average price per MMBtu and Bbls | $ / bbl	31.38
Fair Value	$ 11
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Normal Butane
Derivative [Line Items]
Volume | bbl	329
Average price per MMBtu and Bbls | $ / bbl	40.74
Fair Value	$ 1
Fixed price swaps - 2023 | Not Designated as Hedging Instrument | Natural Gasoline
Derivative [Line Items]
Volume | bbl	329
Average price per MMBtu and Bbls | $ / bbl	64.37
Fair Value	$ 2
Two-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	44,000
Floor price per MMBtu and Bbls | $ / MMBTU	3.07
Cap price per MMBtu and Bbls | $ / MMBTU	3.53
Fair Value	$ 22
Two-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	512
Cap price per MMBtu and Bbls | $ / bbl	85.63
Fair Value	$ 2
Two-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / bbl	70.00
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	88,000
Cap price per MMBtu and Bbls | $ / MMBTU	4.09
Fair Value	$ 35
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas | Sold
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	2.47
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Natural Gas | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	3.20
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	92
Cap price per MMBtu and Bbls | $ / bbl	93.10
Fair Value	$ 0
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil | Sold
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / bbl	65.00
Three-way costless collars - 2023 | Not Designated as Hedging Instrument | Oil | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / bbl	75.00
Financial protection on production - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	234,000
Fair Value	$ 87
Financial protection on production - 2024 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	1,043
Fair Value	$ 2
Fixed Price Swaps - 2024 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	41
Average price per MMBtu and Bbls | $ / bbl	77.66
Fair Value	$ 0
Fixed Price Swaps - 2024 | Not Designated as Hedging Instrument | Propane
Derivative [Line Items]
Volume | bbl	63
Average price per MMBtu and Bbls | $ / bbl	26.46
Fair Value	$ 0
Two-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	73,000
Floor price per MMBtu and Bbls | $ / MMBTU	3.50
Cap price per MMBtu and Bbls | $ / MMBTU	5.40
Fair Value	$ 31
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	161,000
Cap price per MMBtu and Bbls | $ / MMBTU	5.88
Fair Value	$ 56
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas | Sold
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	2.59
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Natural Gas | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / MMBTU	3.66
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Oil
Derivative [Line Items]
Volume | bbl	1,002
Average price per MMBtu and Bbls | $ / bbl	0
Cap price per MMBtu and Bbls | $ / bbl	94.64
Fair Value	$ 2
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Oil | Sold
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / bbl	60.00
Three-way Costless-collars - 2024 | Not Designated as Hedging Instrument | Oil | Purchased
Derivative [Line Items]
Floor price per MMBtu and Bbls | $ / bbl	70.00
Basis swaps | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	91,000
Fair Value	$ 12
Basis Swaps - 2023 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	82,000
Basis Differential | $ / MMBTU	(0.72)
Fair Value	$ 8
Basis Swaps - 2024 | Not Designated as Hedging Instrument | Natural Gas
Derivative [Line Items]
Volume | Mcf	9,000
Basis Differential | $ / MMBTU	(0.64)
Fair Value	$ 4
Call options | Natural Gas
Derivative [Line Items]
Volume | Mcf	228,000
Fair Value	$ (18)
Call Option - 2023 | Natural Gas
Derivative [Line Items]
Volume | Mcf	82,000
Cap price per MMBtu and Bbls | $ / MMBTU	6.56
Fair Value	$ (1)
Call Option - 2024 | Natural Gas
Derivative [Line Items]
Volume | Mcf	73,000
Cap price per MMBtu and Bbls | $ / MMBTU	7.00
Fair Value	$ (6)
Call Option - 2024 | Natural Gas
Derivative [Line Items]
Volume | Mcf	73,000
Cap price per MMBtu and Bbls | $ / MMBTU	7.00
Fair Value	$ (11)