Earnings per Share (Weighted Average Shares Outstanding) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 13, 2019	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic and Diluted	70	1,004	70	70
Earnings Per Share, Basic and Diluted	$ (0.37)	$ 3.65	$ (6.43)	$ (27.44)
Net Income (Loss) Attributable to Weatherford	$ (26)	$ 3,661	$ (450)	$ (1,921)