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, $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) $ / bbl $ / MMBTU Mcf bbl
Financial protection on production - 2022 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	648
Fair value	$ (1,734)
Financial protection on production - 2022 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	2,313
Fair value	$ (102)
Financial protection on production - 2022 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	3,227
Fair value	$ (65)
Fixed Price Swaps - 2022 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	417
Weighted average price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.04
Fair value	$ (1,090)
Fixed Price Swaps - 2022 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,622
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	53.11
Fair value	$ (73)
Fixed Price Swaps - 2022 | Ethane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	2,782
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	11.35
Fair value	$ (29)
Fixed Price Swaps - 2022 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	3,073
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	31.22
Fair value	$ (62)
Fixed Price Swaps - 2022 | Normal Butane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	929
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	36.22
Fair value	$ (23)
Fixed Price Swaps - 2022 | Natural Gasoline
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,001
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	55.78
Fair value	$ (28)
Two Way Costless Collars - 2022 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	47
Fair value	$ (132)
Two Way Costless Collars - 2022 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.91
Three-Way Costless Collars - 2022 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	184
Fair value	$ (512)
Three-Way Costless Collars - 2022 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	691
Fair value	$ (29)
Three-Way Costless Collars - 2022 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	154
Fair value	$ (3)
Three-way Costless Collars - 2022 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.88
Three-way Costless Collars - 2022 Sold Calls | Oil
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / bbl	56.99
Three-way Costless Collars - 2022 Sold Calls | Propane
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / bbl	31.92
Financial protection on production- 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	938
Fair value	$ (1,450)
Financial protection on production- 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	2,183
Fair value	$ (65)
Fixed Price Swaps - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	504
Weighted average price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.08
Fair value	$ (788)
Fixed Price Swaps - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	915
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	58.11
Fair value	$ (25)
Fixed Price Swaps - 2023 | Ethane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,308
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	11.91
Fair value	$ (6)
Fixed Price Swaps - 2023 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,286
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	38.04
Fair value	$ (8)
Fixed Price Swaps - 2023 | Normal Butane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	347
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	41.24
Fair value	$ (3)
Fixed Price Swaps - 2023 | Natural Gasoline
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	359
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	66.00
Fair value	$ (5)
Two Way Costless Collars - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	219
Fair value	$ (269)
Two Way Costless Collars - 2023 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.55
Three Way Costless Collars - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	215
Fair value	$ (393)
Three Way Costless Collars - 2023 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	1,268
Fair value	$ (40)
Three Way Costless Collars - 2023 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.00
Three Way Costless Collars - 2023 Sold Calls | Oil
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / bbl	56.12
Financial protection on production - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	279
Fair value	$ (362)
Fixed Price Swaps - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	224
Weighted average price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.96
Fair value	$ (304)
Fixed Price Swaps - 2024 | Oil
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	749
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	70.63
Fair value	$ (5)
Fixed Price Swaps - 2024 | Propane
Derivative [Line Items]
Volume (Bcf, MBbls) | bbl	73
Weighted average price (in dollars per MMBtu, Bbl) | $ / bbl	42.32
Fair value	$ 0
Two Way Costless Collars - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	44
Fair value	$ (42)
Two Way Costless Collars - 2024 Sold Calls | Natural Gas
Derivative [Line Items]
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.53
Three Way Costless Collars - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	11
Fair value	$ (16)
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
Basis Swaps | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	518
Fair value	$ 76
Basis Swaps - 2022 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	182
Basis differential per MMBtu | $ / MMBTU	(0.53)
Fair value	$ 50
Basis Swap - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	281
Basis differential per MMBtu | $ / MMBTU	(0.50)
Fair value	$ 6
Basis Swap - 2024 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	46
Basis differential per MMBtu | $ / MMBTU	(0.71)
Fair value	$ 16
Basis Swap - 2025 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	9
Basis differential per MMBtu | $ / MMBTU	(0.64)
Fair value	$ 4
Call options | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	97
Fair value	$ (215)
Call Options - 2022 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	42
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.01
Fair value	$ (112)
Call Options - 2023 | Natural Gas
Derivative [Line Items]
Volume (Bcf, MBbls) | Mcf	46
Cap price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.94
Fair value	$ (85)
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	$ (18)
Sold Puts | Three-Way Costless Collars - 2022 Sold Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.03
Sold Puts | Three-Way Costless Collars - 2022 Sold Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	39.80
Sold Puts | Three-Way Costless Collars - 2022 Sold Puts | Propane
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	16.80
Sold Puts | Three Way Costless Collars - 2023 Sold Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.09
Sold Puts | Three Way Costless Collars - 2023 Sold Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	33.97
Sold Puts | Three Way Costless Collars - 2024 Sold Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.25
Purchased Puts | Two Way Costless Collars - 2022 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.52
Purchased Puts | Three Way Costless Collars - 2022 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.48
Purchased Puts | Three Way Costless Collars - 2022 Purchased Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	50.13
Purchased Puts | Three Way Costless Collars - 2022 Purchased Puts | Propane
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	21.00
Purchased Puts | Two Way Costless Collars - 2023 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	3.03
Purchased Puts | Three Way Costless Collars - 2023 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.54
Purchased Puts | Three Way Costless Collars - 2023 Purchased Puts | Oil
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / bbl	45.51
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 | Three Way Costless Collars - 2024 Purchased Puts | Natural Gas
Derivative [Line Items]
Floor price (in dollars per MMBtu, Bbl) | $ / MMBTU	2.80