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Long-term Debt Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			3 Months Ended	12 Months Ended
	Feb. 28, 2018	Jun. 17, 2016	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2018	Jun. 30, 2017	Jun. 26, 2017	Nov. 21, 2016	Jul. 01, 2016	Jun. 07, 2016
Debt Instrument [Line Items]
Debt Instrument, Increase, Accrued Interest				$ 140.0	$ 145.0
Debt and Capital Lease Obligations				7,662.0	7,678.0
Debt Instrument, Face Amount			$ 2.0
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities				502.0	69.0	$ 1,963.0
Capital in Excess of Par Value				6,711.0	6,655.0					$ 271.0
Long-term Debt and Capital Lease Obligations				7,605.0	7,541.0
Bond Tender and Call Premium				(34.0)	0.0	$ (78.0)
Term Loan Borrowings before Debt Issuance Cost [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				310.0
Term Loan Agreement [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				308.0	$ 372.0
Debt Instrument, Periodic Payment, Principal				12.5
Senior Notes, 5.125% due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt											5.125%
Senior Notes, 9.875% due 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt								$ 540.0	$ 250.0
Senior Notes, 8.25 Percent due 2023 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt					8.25%
Senior Notes, 6.35% due 2017 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt											6.35%
Senior Notes, 6.00% due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt											6.00%
Senior Notes, 9.875 Percent due 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 600.0
Senior Notes, 9.625% due 2019 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt											9.625%
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities	475.0
Interest Payable	20.0
Long-term Debt	$ 425.0
Senior Notes, 9.87 Percent due 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt					9.875%
Exchangeable Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount												$ 1,265.0
Stated interest rate on debt												5.875%
Debt Instrument, Convertible, Conversion Price												$ 7.74
Debt Instrument, Convertible, Shares												163.4
Capital in Excess of Par Value												$ 97.0
Long-term Debt and Capital Lease Obligations				1,194.0
Debt Issuance Costs, Net				71.0
Debt Instrument, Interest Rate, Effective Percentage												8.40%
Interest Expense, Debt				99.0
Interest Expense, Debt, Excluding Amortization				74.0
Amortization of Debt Discount (Premium)				25.0
Senior Notes [Member] \| Senior Notes, 4.50% due 2022 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				644.0	$ 643.0
Senior Notes [Member] \| Senior Notes, 5.125% due 2020 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				364.0	364.0
Senior Notes [Member] \| Senior Notes, 5.95% due 2042 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				369.0	368.0
Senior Notes [Member] \| Senior Notes, 6.50% due 2036 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				447.0	447.0
Senior Notes [Member] \| Senior Notes, 6.75% due 2040 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				457.0	456.0
Senior Notes [Member] \| Senior Notes, 6.80% due 2037 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				255.0	255.0
Senior Notes [Member] \| Senior Notes, 7.00% due 2038 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				456.0	456.0
Senior Notes [Member] \| Senior Notes, 9.875% due 2024 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				781.0	780.0
Stated interest rate on debt									9.875%
Senior Notes [Member] \| Senior Notes, 7.75 Percent due 2021 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				743.0	741.0
Senior Notes [Member] \| Senior Notes, 8.25 Percent due 2023 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				742.0	739.0
Senior Notes [Member] \| Senior Notes, 6.00% due 2018 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				0.0	66.0
Stated interest rate on debt							6.00%
Senior Notes [Member] \| Senior Notes, 9.875 Percent due 2025 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				588.0	0.0
Stated interest rate on debt	9.875%
Senior Notes [Member] \| Senior Notes, 9.625% due 2019 [Member]
Debt Instrument [Line Items]
Debt and Capital Lease Obligations				$ 0.0	$ 488.0
Stated interest rate on debt	9.625%
Senior Notes [Member]
Debt Instrument [Line Items]
Repayments of Debt		$ 1,972.0
Debt Instrument, Repurchased Face Amount		$ 1,870.0
Interest Payable			27.0
Bond Tender and Call Premium			$ 78.0
London Interbank Offered Rate (LIBOR) [Member] \| Term Loan Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.30%
London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member] \| Term Loan Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.425%
London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member] \| Term Loan Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.20%
Base Rate [Member] \| Minimum [Member] \| Term Loan Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.425%
Base Rate [Member] \| Maximum [Member] \| Term Loan Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				2.20%
Weatherford Bermuda [Member] \| Senior Notes [Member] \| Senior Notes, 6.80% due 2037 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				6.80%	6.80%
Weatherford Bermuda [Member] \| Senior Notes [Member] \| Senior Notes, 6.35% due 2017 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt					6.35%			6.35%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 4.50% due 2022 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				4.50%	4.50%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 5.125% due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				5.125%	5.125%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 5.95% due 2042 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				5.95%	5.95%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 6.50% due 2036 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				6.50%	6.50%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 6.75% due 2040 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				6.75%	6.75%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 7.00% due 2038 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				7.00%	7.00%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 9.875% due 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				9.875%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 7.75 Percent due 2021 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				7.75%	7.75%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 8.25 Percent due 2023 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				8.25%	8.25%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 6.00% due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				6.00%	6.00%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 9.875 Percent due 2025 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				9.875%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 9.625% due 2019 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt				9.625%	9.625%
Weatherford Delaware [Member] \| Senior Notes [Member] \| Senior Notes, 9.87 Percent due 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate on debt					9.875%