Derivatives and Risk Management (Schedule of Derivative Instruments Notional Amount, Weighted Average Contract Prices and Fair Value) (Details) - Not Designated as Hedging Instrument MBbls in Thousands, Bcf in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) $ / bbl $ / MMBTU MBbls Bcf
Financial protection on production- 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	521
Fair value	$ 67
Financial protection on production- 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	2,342
Fair value	$ (12)
Fixed Price Swaps - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	348
Weighted average price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.25
Fair value	$ 91
Fixed Price Swaps - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	1,466
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	67.34
Fair value	$ (4)
Fixed Price Swaps - 2023 | Ethane
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	4,499
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	11.01
Fair value	$ 4
Fixed Price Swaps - 2023 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	3,601
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	32.19
Fair value	$ 28
Fixed Price Swaps - 2023 | Normal Butane
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	396
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	40.96
Fair value	$ 5
Fixed Price Swaps - 2023 | Natural Gasoline
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	342
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	63.74
Fair value	$ 4
Two Way Costless Collars - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	78
Fair value	$ 4
Two Way Costless Collars - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	294
Fair value	$ 1
Two Way Costless Collars - 2023 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.21
Two Way Costless Collars - 2023 Sold Calls | Oil
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / bbl	80.58
Three Way Costless Collars - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	95
Fair value	$ (28)
Three Way Costless Collars - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	582
Fair value	$ (9)
Three Way Costless Collars - 2023 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.91
Three Way Costless Collars - 2023 Sold Calls | Oil
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / bbl	55.96
Financial protection on production - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	583
Fair value	$ (5)
Financial protection on production - 2024 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	1,717
Fair value	$ 3
Fixed Price Swaps - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	528
Weighted average price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.54
Fair value	$ 12
Fixed Price Swaps - 2024 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	1,571
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	71.06
Fair value	$ 3
Fixed Price Swaps - 2024 | Ethane
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	1,305
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	10.81
Fair value	$ 0
Fixed Price Swaps - 2024 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	1,460
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	33.29
Fair value	$ 11
Fixed Price Swaps - 2024 | Normal Butane
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	329
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	40.74
Fair value	$ 3
Fixed Price Swaps - 2024 | Natural Gasoline
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	329
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	64.37
Fair value	$ 3
Two Way Costless Collars - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	44
Fair value	$ (10)
Two Way Costless Collars - 2024 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	146
Fair value	$ 0
Two Way Costless Collars - 2024 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.53
Two Way Costless Collars - 2024 Sold Calls | Oil
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / bbl	78.25
Three Way Costless Collars - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	11
Fair value	$ (7)
Three Way Costless Collars - 2024 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.54
Financial protection on production - 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	179
Fair value	$ 25
Two Way Costless Collars - 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	73
Fair value	$ 10
Two Way Costless Collars - 2025 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	5.40
Three Way Costless Collars - 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	106
Fair value	$ 15
Three Way Costless Collars - 2025 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	5.69
Basis Swaps | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	201
Fair value	$ 79
Basis Swap - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	146
Basis differential per MMBtu | $ / MMBTU	(0.62)
Fair value	$ 68
Basis Swap - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	46
Basis differential per MMBtu | $ / MMBTU	(0.71)
Fair value	$ 8
Basis Swap - 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	9
Basis differential per MMBtu | $ / MMBTU	(0.64)
Fair value	$ 3
Call options | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	253
Fair value	$ (61)
Call Options - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	25
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.96
Fair value	$ (11)
Call Options - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	82
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	6.56
Fair value	$ (15)
Fixed Price Swaps - 2025 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	41
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	77.66
Fair value	$ 0
Call Options 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	73
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	7.00
Fair value	$ (15)
Call Options 2026 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Bcf	73
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	7.00
Fair value	$ (20)
Sold Puts | Three Way Costless Collars - 2023 Sold Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.08
Sold Puts | Three Way Costless Collars - 2023 Sold Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	34.36
Sold Puts | Three Way Costless Collars - 2024 Sold Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.25
Sold Puts | Three Way Costless Collars - 2025 Sold Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.50
Purchased Puts | Two Way Costless Collars - 2023 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.83
Purchased Puts | Two Way Costless Collars - 2023 Purchased Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	70.00
Purchased Puts | Three Way Costless Collars - 2023 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.50
Purchased Puts | Three Way Costless Collars - 2023 Purchased Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	46.05
Purchased Puts | Two Way Costless Collars - 2024 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.07
Purchased Puts | Two Way Costless Collars - 2024 Purchased Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	70.00
Purchased Puts | Three Way Costless Collars - 2024 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.80
Purchased Puts | Two Way Costless Collars - 2025 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.50
Purchased Puts | Three Way Costless Collars - 2025 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.75