Capital Stock - Conversions of Stock (Details) - Common Stock - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Coterra common stock issued (in shares)	79,285	809,846
Cash paid for conversion (in millions)	$ 1	$ 10
Book value of preferred shares at conversion (in millions)	$ 3	$ 39
Redeemable Preferred Stock
Class of Stock [Line Items]
Preferred stock converted into Coterra common stock (in shares)	2,000	21,900