Long-term Debt Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 12, 2019	Sep. 30, 2019	Jun. 15, 2019	Dec. 31, 2018	Mar. 31, 2018	Feb. 28, 2018	Jun. 26, 2017
Debt Instrument [Line Items]
Total	$ 2,161				$ 7,662
Less: Amounts Due in One Year	10				57
Long-term Debt	2,151				7,605
Term Loan Agreement
Debt Instrument [Line Items]
Total	0				308
Senior Notes [Member] | Exit Notes, 11.00 Percent Due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		11.00%
Total		$ 2,097			0
Senior Notes [Member] | Senior Notes, 6.00% due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						6.00%
Senior Notes [Member] | Senior Notes, 9.625% due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							9.625%
Senior Notes [Member] | Senior Notes, 5.125% due 2020
Debt Instrument [Line Items]
Total	0				364
Senior Notes [Member] | Exchangeable Senior Notes, 5.875 Percent due 2021
Debt Instrument [Line Items]
Total	0				1,194
Senior Notes [Member] | Senior Notes, 7.75 Percent due 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				7.75%
Total	0				743
Senior Notes [Member] | Senior Notes, 4.50% due 2022
Debt Instrument [Line Items]
Total	0				644
Senior Notes [Member] | Senior Notes, 9.875 Percent due 2024
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage								9.875%
Total	0				781
Senior Notes [Member] | Senior Notes, 9.875 Percent due 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage							9.875%
Total	0				588
Senior Notes [Member] | Senior Notes, 8.25 Percent due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				8.25%
Total	0				742
Senior Notes [Member] | Senior Notes, 6.50% due 2036
Debt Instrument [Line Items]
Total	0				447
Senior Notes [Member] | Senior Notes, 6.80% due 2037
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				6.80%
Total	0				255
Senior Notes [Member] | Senior Notes, 7.00% due 2038
Debt Instrument [Line Items]
Total	0				456
Senior Notes [Member] | Senior Notes, 9.875% due 2039
Debt Instrument [Line Items]
Total	0				245
Senior Notes [Member] | Senior Notes, 6.75% due 2040
Debt Instrument [Line Items]
Total	0				457
Senior Notes [Member] | Senior Notes, 5.95% due 2042
Debt Instrument [Line Items]
Total	0				369
Capital and Other Lease Obligations [Member]
Debt Instrument [Line Items]
Total	$ 64				$ 69
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 6.00% due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.00%				6.00%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 9.625% due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.625%				9.625%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 5.125% due 2020
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.125%		5.125%
Weatherford Delaware [Member] | Senior Notes [Member] | Exchangeable Senior Notes, 5.875 Percent due 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.875%		5.875%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 7.75 Percent due 2021
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			7.75%		7.75%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 4.50% due 2022
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.50%		4.50%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 9.875 Percent due 2024
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			9.875%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 8.25 Percent due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			8.25%		8.25%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 6.50% due 2036
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.50%		6.50%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 7.00% due 2038
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			7.00%		7.00%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 9.875% due 2039
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					9.875%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 6.75% due 2040
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			6.75%		6.75%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 5.95% due 2042
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.95%		5.95%