Loss per Share (Weighted Average Shares Outstanding) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Loss Attributable to Weatherford	$ (581)	$ (316)	$ (1,547)	$ (797)
Weighted Average Shares Outstanding, Basic and Diluted (in shares)	70	1,004	70	1,003
Loss Per Share, Basic & Diluted (in dollars per share)	$ (8.30)	$ (0.31)	$ (22.10)	$ (0.79)