Condensed Consolidating Financial Statements (Condensed Consolidating Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Income Statements, Captions [Line Items]
Revenues	$ 1,346	$ 1,423
Costs and Expenses	(1,647)	(1,462)
Operating Income (Loss)	(301)	(39)
Other Income (Expense):
Interest Expense, Net	(155)	(149)
Intercompany Charges, Net	0	0
Income (Loss) from Subsidiary	0	0
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	(9)	(22)
Loss Before Income Taxes	(465)	(210)
(Provision) Benefit for Income Taxes	(12)	(32)
Net Loss	(477)	(242)
Noncontrolling Interests	4	3
Net Income (Loss) Attributable to Weatherford	(481)	(245)
Comprehensive Income (Loss) Attributable to Weatherford	(448)	(240)
Other Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues	1,346	1,423
Costs and Expenses	(1,638)	(1,464)
Operating Income (Loss)	(292)	(41)
Other Income (Expense):
Interest Expense, Net	7	4
Intercompany Charges, Net	(42)	(594)
Income (Loss) from Subsidiary	0	0
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	(12)	(157)
Loss Before Income Taxes	(339)	(788)
(Provision) Benefit for Income Taxes	(12)	(32)
Net Loss	(351)	(820)
Noncontrolling Interests	4	3
Net Income (Loss) Attributable to Weatherford	(355)	(823)
Comprehensive Income (Loss) Attributable to Weatherford	(322)	(818)
Weatherford Ireland
Condensed Income Statements, Captions [Line Items]
Revenues	0	0
Costs and Expenses	(9)	2
Operating Income (Loss)	(9)	2
Other Income (Expense):
Interest Expense, Net	0	0
Intercompany Charges, Net	0	(18)
Income (Loss) from Subsidiary	(472)	(275)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	0	46
Loss Before Income Taxes	(481)	(245)
(Provision) Benefit for Income Taxes	0	0
Net Loss	(481)	(245)
Noncontrolling Interests	0	0
Net Income (Loss) Attributable to Weatherford	(481)	(245)
Comprehensive Income (Loss) Attributable to Weatherford	(448)	(240)
Weatherford Bermuda
Condensed Income Statements, Captions [Line Items]
Revenues	0	0
Costs and Expenses	0	0
Operating Income (Loss)	0	0
Other Income (Expense):
Interest Expense, Net	(143)	(144)
Intercompany Charges, Net	1	(3)
Income (Loss) from Subsidiary	(161)	(350)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	4	90
Loss Before Income Taxes	(299)	(407)
(Provision) Benefit for Income Taxes	0	0
Net Loss	(299)	(407)
Noncontrolling Interests	0	0
Net Income (Loss) Attributable to Weatherford	(299)	(407)
Comprehensive Income (Loss) Attributable to Weatherford	(305)	(401)
Weatherford Delaware
Condensed Income Statements, Captions [Line Items]
Revenues	0	0
Costs and Expenses	0	0
Operating Income (Loss)	0	0
Other Income (Expense):
Interest Expense, Net	(25)	(14)
Intercompany Charges, Net	(4)	11
Income (Loss) from Subsidiary	(186)	(133)
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	(1)	122
Loss Before Income Taxes	(216)	(14)
(Provision) Benefit for Income Taxes	0	0
Net Loss	(216)	(14)
Noncontrolling Interests	0	0
Net Income (Loss) Attributable to Weatherford	(216)	(14)
Comprehensive Income (Loss) Attributable to Weatherford	(218)	(2)
Eliminations
Condensed Income Statements, Captions [Line Items]
Revenues	0	0
Costs and Expenses	0	0
Operating Income (Loss)	0	0
Other Income (Expense):
Interest Expense, Net	6	5
Intercompany Charges, Net	(45)	(604)
Income (Loss) from Subsidiary	819	758
Other Nonoperating Income (Expense), Including Foreign Currency Devaluation	0	(123)
Loss Before Income Taxes	870	1,244
(Provision) Benefit for Income Taxes	0	0
Net Loss	870	1,244
Noncontrolling Interests	0	0
Net Income (Loss) Attributable to Weatherford	870	1,244
Comprehensive Income (Loss) Attributable to Weatherford	$ 845	$ 1,221