Capital Stock - Narrative (Details)			1 Months Ended					3 Months Ended	12 Months Ended
	May 01, 2024 shares	Oct. 01, 2021 USD ($) shares	Feb. 28, 2022 USD ($) $ / shares	Nov. 30, 2021 $ / shares	Oct. 30, 2021 $ / shares	Apr. 30, 2021 $ / shares	Mar. 31, 2021 $ / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Nov. 03, 2021 $ / shares	Oct. 31, 2021 $ / shares	Oct. 15, 2021 $ / shares	Oct. 04, 2021 $ / shares	Sep. 29, 2021 shares	Sep. 28, 2021 shares	May 01, 2014 shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock, issued (in shares)								892,612,010	892,612,010	477,828,813
Common stock, authorized (in shares)								1,800,000,000	1,800,000,000	960,000,000						1,800,000,000	960,000,000
Cash dividends, per share (in dollars per share) | $ / shares				$ 0.125	$ 0.11	$ 0.11	$ 0.10		$ 1.12	$ 0.40	$ 0.35
Dividends payable (in dollars per share) | $ / shares															$ 0.50
Variable dividends (in dollars per share) | $ / shares												$ 0.30
Preferred stock dividends, per share (in dollars per share) | $ / shares								$ 20.3125
Additional awards granted (in shares)		1,577,554							1,577,554	0	0
Number of shares repurchased (in shares)									0	0	25,500,000
Cost of shares repurchased | $											$ 488,000,000
Cumulative number of shares repurchased under a share repurchase program (in shares)								99,000,000	99,000,000
Treasury stock, cumulative shares retired (in shares)								20,000,000	20,000,000
Cumulative cost of shares repurchased under a share repurchase program | $								$ 1,900,000,000	$ 1,900,000,000
Treasury stock reissued (in shares)									0
Treasury stock, number of shares authorized to be repurchased (in shares)								11,000,000	11,000,000
Cimarex redeemable preferred stock | $		$ 50,000,000
Shares withheld for taxes (in shares)									125,067
Value of shares withheld for taxes | $									$ 3,000,000
Shares held as treasury stock (in shares)								79,082,385	79,082,385	78,957,318
Cumulative cash dividends at the annual rate									8.125%
Liquidation preference ( in dollar per share) | $ / shares								$ 1,000	$ 1,000
Total liquidation preference | $								$ 28,000,000	$ 28,000,000
Preferred Stock at an initial conversion rate		34.1008						35.38530	35.38530
Payment of cash dividends to common shareholders | $									$ 780,000,000	$ 159,000,000	$ 146,000,000
Preferred stock cash per share | $ / shares								$ 471.3975	$ 471.3975					$ 471.3975
Preferred Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Dividends payable | $								$ 1,000,000	$ 1,000,000
Subsequent Event
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Cash dividends, per share (in dollars per share) | $ / shares			$ 0.15
Dividends payable (in dollars per share) | $ / shares			0.56
Variable dividends (in dollars per share) | $ / shares			$ 0.41
Repurchase program authorizes | $			$ 1,250,000,000
Cimarex Stockholders
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock, issued (in shares)		408,200,000						35,900,000	35,900,000
Restricted Stock Awards | Cimarex Stockholders
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock, issued (in shares)		3,400,000
2014 Incentive Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of shares reserved for issuance (in shares)																		18,000,000
Number of shares available for issuance (in shares)								10,500,000	10,500,000
2014 Incentive Plan | Stock Options | Maximum
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of shares reserved for issuance (in shares)																		10,000,000
Scenario Forecast | 2014 Incentive Plan
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Additional awards granted (in shares)	0
Redeemable Preferred Stock
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Preferred Stock, Par or Stated Value Per Share | $ / shares													$ 0.01