Derivatives and Risk Management (Schedule of Derivative Instruments Notional Amount, Weighted Average Contract Prices and Fair Value) (Details) - Not Designated as Hedging Instrument bbl in Thousands, Mcf in Millions, MBbls in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) $ / bbl $ / MMBTU $ / barrel Mcf bbl MBbls
Financial protection on production- 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	714
Fair value	$ 168
Financial protection on production- 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	2,219
Fair value	$ (29)
Fixed Price Swaps - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	453
Weighted average price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.15
Fair value	$ 169
Fixed Price Swaps - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	999
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	62.61
Fair value	$ (11)
Fixed Price Swaps - 2023 | Ethane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	5,570
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	11.51
Fair value	$ 12
Fixed Price Swaps - 2023 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	3,592
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	36.31
Fair value	$ 9
Fixed Price Swaps - 2023 | Normal Butane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	591
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	40.96
Fair value	$ 1
Fixed Price Swaps - 2023 | Natural Gasoline
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	512
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	63.74
Fair value	$ 0
Two Way Costless Collars - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	116
Fair value	$ 30
Two Way Costless Collars - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	294
Fair value	$ 0
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) | Mcf	145
Fair value	$ (31)
Three Way Costless Collars - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	926
Fair value	$ (18)
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	56.07
Financial protection on production - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	583
Fair value	$ (65)
Financial protection on production - 2024 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,717
Fair value	$ 0
Fixed Price Swaps - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	528
Weighted average price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.54
Fair value	$ (42)
Fixed Price Swaps - 2024 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,571
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	71.06
Fair value	$ 0
Fixed Price Swaps - 2024 | Ethane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,305
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	10.81
Fair value	$ 1
Fixed Price Swaps - 2024 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,094
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	35.70
Fair value	$ 2
Fixed Price Swaps - 2024 | Normal Butane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	329
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	40.74
Fair value	$ 1
Fixed Price Swaps - 2024 | Natural Gasoline
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	329
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	64.37
Fair value	$ 1
Two Way Costless Collars - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	44
Fair value	$ (15)
Two Way Costless Collars - 2024 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	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) | Mcf	11
Fair value	$ (8)
Three Way Costless Collars - 2024 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.54
Fixed Price Swaps - 2025 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	41
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	77.66
Fair value	$ 0
Three Way Costless Collars - 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	99
Fair value	$ (8)
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) | Mcf	275
Fair value	$ (19)
Basis Swap - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	220
Basis differential per MMBtu | $ / MMBTU	(0.63)
Fair value	$ (26)
Basis Swap - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	46
Basis differential per MMBtu | $ / MMBTU	(0.71)
Fair value	$ 5
Basis Swap - 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	9
Basis differential per MMBtu | $ / MMBTU	(0.64)
Fair value	$ 2
Call options | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	45
Fair value	$ (27)
Call Options - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	36
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.95
Fair value	$ (16)
Call Options - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	9
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.00
Fair value	$ (11)
Put Options - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | MBbls	127
Cap price (in dollars per MMBtu, Bbl) | $ / barrel	73.50
Fair value	$ 0
Sold Puts | Three Way Costless Collars - 2023 Sold Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.07
Sold Puts | Three Way Costless Collars - 2023 Sold Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	34.09
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	2.86
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	2.49
Purchased Puts | Three Way Costless Collars - 2023 Purchased Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	45.68
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 | Three Way Costless Collars - 2025 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.75