Long-term Debt Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2018	Mar. 31, 2018	Feb. 28, 2018	Dec. 31, 2017	Jun. 26, 2017	Jul. 01, 2016
Debt Instrument [Line Items]
Total	$ 7,662			$ 7,678
Less: Amounts Due in One Year	57			137
Long-term Debt	7,605			$ 7,541
Senior Notes, 6.35% due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						6.35%
Senior Notes, 6.00% due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						6.00%
Senior Notes, 9.625% due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						9.625%
Senior Notes, 5.125% due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						5.125%
Senior Notes, 8.25 Percent due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				8.25%
Term Loan Agreement [Member]
Debt Instrument [Line Items]
Total	308			$ 372
Senior Notes [Member] | Senior Notes, 6.00% due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		6.00%
Total	0			66
Senior Notes [Member] | Senior Notes, 9.625% due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			9.625%
Total	0			488
Senior Notes [Member] | Senior Notes, 5.125% due 2020 [Member]
Debt Instrument [Line Items]
Total	364			364
Senior Notes [Member] | Exchangeable Senior Notes, 5.875 Percent due 2021 [Member]
Debt Instrument [Line Items]
Total	1,194			1,170
Senior Notes [Member] | Senior Notes, 7.75 Percent due 2021 [Member]
Debt Instrument [Line Items]
Total	743			741
Senior Notes [Member] | Senior Notes, 4.50% due 2022 [Member]
Debt Instrument [Line Items]
Total	644			643
Senior Notes [Member] | Senior Notes, 9.875% due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					9.875%
Total	781			780
Senior Notes [Member] | Senior Notes, 9.875 Percent due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			9.875%
Total	588			0
Senior Notes [Member] | Senior Notes, 8.25 Percent due 2023 [Member]
Debt Instrument [Line Items]
Total	742			739
Senior Notes [Member] | Senior Notes, 6.50% due 2036 [Member]
Debt Instrument [Line Items]
Total	447			447
Senior Notes [Member] | Senior Notes, 6.80% due 2037 [Member]
Debt Instrument [Line Items]
Total	255			255
Senior Notes [Member] | Senior Notes, 7.00% due 2038 [Member]
Debt Instrument [Line Items]
Total	456			456
Senior Notes [Member] | Senior Notes, 9.875% due 2039 [Member]
Debt Instrument [Line Items]
Total	245			245
Senior Notes [Member] | Senior Notes, 6.75% due 2040 [Member]
Debt Instrument [Line Items]
Total	457			456
Senior Notes [Member] | Senior Notes, 5.95% due 2042 [Member]
Debt Instrument [Line Items]
Total	$ 369			$ 368
Secured Borrowings [Member] | Secured Borrowing, 4.82% [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.82%			4.82%
Capital and Other Lease Obligations [Member]
Debt Instrument [Line Items]
Total	$ 69			$ 86
Other Long-term Debt [Member]
Debt Instrument [Line Items]
Total	$ 0			$ 2
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 [Member]
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 [Member]
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 [Member]
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 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.50%			4.50%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 9.875% due 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.875%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 9.875 Percent due 2025 [Member]
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 [Member]
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 [Member]
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 [Member]
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 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	9.875%			9.875%
Weatherford Delaware [Member] | Senior Notes [Member] | Senior Notes, 6.75% due 2040 [Member]
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 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.95%			5.95%