Condensed Consolidating Financial Statements (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Condensed Income Statements, Captions [Line Items]
Revenues	$ 1,309		$ 1,448		$ 2,655	$ 2,871
Costs and Expenses	(1,427)		(1,521)		(3,074)	(2,983)
Operating Income (Loss)	(118)		(73)		(419)	(112)
Other Income (Expense):
Interest Expense, Net	(160)		(152)		(315)	(301)
Intercompany Charges, Net	0		0		0	0
Income (Loss) from Subsidiary	0		0		0	0
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	(1)		(8)		(10)	(30)
Loss Before Income Taxes	(279)		(233)		(744)	(443)
(Provision) Benefit for Income Taxes	(33)		(26)		(45)	(58)
Net Loss	(312)	$ (477)	(259)	$ (242)	(789)	(501)
Noncontrolling Interests	4		5		8	8
Net Income (Loss) Attributable to Weatherford	(316)		(264)		(797)	(509)
Comprehensive Income (Loss) Attributable to Weatherford	(286)		(429)		(734)	(669)
Other Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues	1,309		1,448
Costs and Expenses	(1,376)		(1,516)
Operating Income (Loss)	(67)		(68)		(359)	(109)
Other Income (Expense):
Interest Expense, Net	5		5
Intercompany Charges, Net	32		(81)
Income (Loss) from Subsidiary	0		0
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	(1)		(28)
Loss Before Income Taxes	(31)		(172)			(960)
(Provision) Benefit for Income Taxes	(33)		(26)
Net Loss	(64)		(198)			(1,018)
Noncontrolling Interests	4		5
Net Income (Loss) Attributable to Weatherford	(68)		(203)			(1,026)
Comprehensive Income (Loss) Attributable to Weatherford	(38)		(369)
Weatherford Ireland
Condensed Income Statements, Captions [Line Items]
Revenues	0		0
Costs and Expenses	(49)		(5)
Operating Income (Loss)	(49)		(5)		(58)	(3)
Other Income (Expense):
Interest Expense, Net	0		0
Intercompany Charges, Net	0		3
Income (Loss) from Subsidiary	(267)		(272)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	0		10
Loss Before Income Taxes	(316)		(264)			(509)
(Provision) Benefit for Income Taxes	0		0
Net Loss	(316)		(264)			(509)
Noncontrolling Interests	0		0
Net Income (Loss) Attributable to Weatherford	(316)		(264)			(509)
Comprehensive Income (Loss) Attributable to Weatherford	(286)		(429)
Weatherford Bermuda
Condensed Income Statements, Captions [Line Items]
Revenues	0		0
Costs and Expenses	(2)		0
Operating Income (Loss)	(2)		0		(2)	0
Other Income (Expense):
Interest Expense, Net	(145)		(137)
Intercompany Charges, Net	7		5
Income (Loss) from Subsidiary	98		28
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	0		10
Loss Before Income Taxes	(42)		(94)			(501)
(Provision) Benefit for Income Taxes	0		0
Net Loss	(42)		(94)			(501)
Noncontrolling Interests	0		0
Net Income (Loss) Attributable to Weatherford	(42)		(94)			(501)
Comprehensive Income (Loss) Attributable to Weatherford	(67)		(126)
Weatherford Delaware
Condensed Income Statements, Captions [Line Items]
Revenues	0		0
Costs and Expenses	0		0
Operating Income (Loss)	0		0		0	0
Other Income (Expense):
Interest Expense, Net	(26)		(25)
Intercompany Charges, Net	(39)		(40)
Income (Loss) from Subsidiary	66		(23)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	0		11
Loss Before Income Taxes	1		(77)			(91)
(Provision) Benefit for Income Taxes	0		0
Net Loss	1		(77)			(91)
Noncontrolling Interests	0		0
Net Income (Loss) Attributable to Weatherford	1		(77)			(91)
Comprehensive Income (Loss) Attributable to Weatherford	(7)		(55)
Reportable Legal Entities [Member] | Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Revenues					0	0
Costs and Expenses					(58)	(3)
Other Income (Expense):
Interest Expense, Net					0	0
Intercompany Charges, Net					0	(15)
Income (Loss) from Subsidiary					(739)	(547)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation					0	56
Loss Before Income Taxes					(797)
(Provision) Benefit for Income Taxes					0	0
Net Loss					(797)	(509)
Noncontrolling Interests					0	0
Net Income (Loss) Attributable to Weatherford					(797)
Comprehensive Income (Loss) Attributable to Weatherford					(734)	(669)
Reportable Legal Entities [Member] | Other Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues					2,655	2,871
Costs and Expenses					(3,014)	(2,980)
Other Income (Expense):
Interest Expense, Net					12	9
Intercompany Charges, Net					(10)	(675)
Income (Loss) from Subsidiary					0	0
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation					(13)	(185)
Loss Before Income Taxes					(370)
(Provision) Benefit for Income Taxes					(45)	(58)
Net Loss					(415)	(1,018)
Noncontrolling Interests					8	8
Net Income (Loss) Attributable to Weatherford					(423)
Comprehensive Income (Loss) Attributable to Weatherford					(360)	(1,187)
Reportable Legal Entities [Member] | Weatherford Bermuda | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues					0	0
Costs and Expenses					(2)	0
Other Income (Expense):
Interest Expense, Net					(288)	(281)
Intercompany Charges, Net					8	2
Income (Loss) from Subsidiary					(63)	(322)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation					4	100
Loss Before Income Taxes					(341)
(Provision) Benefit for Income Taxes					0	0
Net Loss					(341)	(501)
Noncontrolling Interests					0	0
Net Income (Loss) Attributable to Weatherford					(341)
Comprehensive Income (Loss) Attributable to Weatherford					(372)	(527)
Reportable Legal Entities [Member] | Weatherford Delaware | Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues					0	0
Costs and Expenses					0	0
Other Income (Expense):
Interest Expense, Net					(51)	(39)
Intercompany Charges, Net					(43)	(29)
Income (Loss) from Subsidiary					(120)	(156)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation					(1)	133
Loss Before Income Taxes					(215)
(Provision) Benefit for Income Taxes					0	0
Net Loss					(215)	(91)
Noncontrolling Interests					0	0
Net Income (Loss) Attributable to Weatherford					(215)
Comprehensive Income (Loss) Attributable to Weatherford					(225)	(57)
Eliminations
Condensed Income Statements, Captions [Line Items]
Revenues	0		0		0	0
Costs and Expenses	0		0		0	0
Operating Income (Loss)	0		0		0	0
Other Income (Expense):
Interest Expense, Net	6		5		12	10
Intercompany Charges, Net	0		(113)		45	717
Income (Loss) from Subsidiary	103		267		922	1,025
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	0		(11)		0	(134)
Loss Before Income Taxes	109		374		979	1,618
(Provision) Benefit for Income Taxes	0		0		0	0
Net Loss	109		374		979	1,618
Noncontrolling Interests	0		0		0	0
Net Income (Loss) Attributable to Weatherford	109		374		979	1,618
Comprehensive Income (Loss) Attributable to Weatherford	$ 112		$ 550		$ 957	$ 1,771