CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 13, 2019	Dec. 31, 2020	Dec. 31, 2018
Revenue from Contract with Customer, Including Assessed Tax	$ 261	$ 4,954	$ 3,685	$ 5,744
Revenues:
Total Revenues	261	4,954	3,685	5,744
Costs and Expenses:
Research and Development	7	136	97	139
Selling, General and Administrative	45	895	837	894
Asset Impairment Charges	0	1,104	1,236	2,155
Restructuring Charges	0	189	206	126
Prepetition Charges	0	86	0	0
Gain on Sale of Operational Assets	0	15	12	0
Gain on Sale of Businesses, Net	0	(112)	0	0
Total Costs and Expenses	260	6,136	5,171	7,828
Operating Income (Loss)	1	(1,182)	(1,486)	(2,084)
Other Income (Expense):
Reorganization Items	(4)	5,389	(9)	0
Interest Expense, Net	(12)	(362)	(266)	(614)
Other Expense, Net	0	(26)	(53)	(59)
Income (Loss) Before Income Taxes	(15)	3,819	(1,814)	(2,757)
Income Tax Provision	(9)	(135)	(85)	(34)
Net Income (Loss)	(24)	3,684	(1,899)	(2,791)
Net Income Attributable to Noncontrolling Interests	2	23	22	20
Net Income (Loss) Attributable to Weatherford	$ (26)	$ 3,661	$ (1,921)	$ (2,811)
Income (Loss) Per Share Attributable to Weatherford:
Earnings Per Share, Basic and Diluted	$ (0.37)	$ 3.65	$ (27.44)	$ (2.82)
Weighted Average Shares Outstanding:
Basic & Diluted (in shares)	70	1,004	70	997
Operating Segments [Member]
Costs and Expenses:
Operating Income (Loss)	$ 6	$ 188	$ 55	$ 327
Product
Revenue from Contract with Customer, Including Assessed Tax	111	1,819	1,435	2,051
Revenues:
Cost of Goods and Services Sold	100	1,685	1,257	1,887
Service
Revenue from Contract with Customer, Including Assessed Tax	150	3,135	2,250	3,693
Revenues:
Cost of Goods and Services Sold	$ 108	$ 2,168	$ 1,550	$ 2,627