Condensed Consolidating Financial Statements (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and Cash Equivalents	$ 598	$ 602	$ 459	$ 613
Other Current Assets	2,808	2,848
Total Current Assets	3,406	3,450
Equity Investments in Affiliates	0	0
Intercompany Receivables, Net	0	0
Other Assets	3,113	3,151
Total Assets	6,519	6,601
Current Liabilities
Short-term Borrowings and Current Portion of Long-Term Debt	612	383
Accounts Payable and Other Current Liabilities	1,892	1,917
Total Current Liabilities	2,504	2,300
Long-term Debt	7,606	7,605
Intercompany Payables, Net	0	0
Other Long-term Liabilities	515	362
Total Liabilities	10,625	10,267
Weatherford Shareholders’ Equity	(4,145)	(3,705)
Noncontrolling Interests	39	39
Total Liabilities and Shareholders’ Deficiency	6,519	6,601
Other Subsidiaries
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	9,445	9,657
Weatherford Ireland
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	(4,122)	(3,693)
Weatherford Bermuda
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	7,829	7,933
Weatherford Delaware
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	7,527	7,861
Eliminations
Current Assets
Cash and Cash Equivalents	0	0	0	0
Other Current Assets	(523)	(694)
Total Current Assets	(523)	(694)
Equity Investments in Affiliates	(10,558)	(11,394)
Intercompany Receivables, Net	(3,079)	(3,069)
Other Assets	0	0
Total Assets	(14,160)	(15,157)
Current Liabilities
Short-term Borrowings and Current Portion of Long-Term Debt	0	0
Accounts Payable and Other Current Liabilities	(523)	(694)
Total Current Liabilities	(523)	(694)
Long-term Debt	62	68
Intercompany Payables, Net	(3,079)	(3,069)
Other Long-term Liabilities	(8)	(7)
Total Liabilities	(3,548)	(3,702)
Weatherford Shareholders’ Equity	(10,612)	(11,455)
Noncontrolling Interests	0	0
Total Liabilities and Shareholders’ Deficiency	(14,160)	(15,157)
Reportable Legal Entities [Member] | Other Subsidiaries
Current Assets
Cash and Cash Equivalents	354	318	353	418
Other Current Assets	2,842	2,887
Total Current Assets	3,196	3,205
Equity Investments in Affiliates	407	354
Intercompany Receivables, Net	2,875	2,966
Other Assets	2,967	3,132
Total Assets	9,445	9,657
Current Liabilities
Short-term Borrowings and Current Portion of Long-Term Debt	13	10
Accounts Payable and Other Current Liabilities	2,262	2,428
Total Current Liabilities	2,275	2,438
Long-term Debt	128	130
Intercompany Payables, Net	0	0
Other Long-term Liabilities	516	362
Total Liabilities	2,919	2,930
Weatherford Shareholders’ Equity	6,487	6,688
Noncontrolling Interests	39	39
Reportable Legal Entities [Member] | Parent Company [Member]
Current Assets
Cash and Cash Equivalents	0	0	0	0
Other Current Assets	4	1
Total Current Assets	4	1
Equity Investments in Affiliates	(4,126)	(3,694)
Intercompany Receivables, Net	0	0
Other Assets	0	0
Total Assets	(4,122)	(3,693)
Current Liabilities
Short-term Borrowings and Current Portion of Long-Term Debt	0	0
Accounts Payable and Other Current Liabilities	13	9
Total Current Liabilities	13	9
Long-term Debt	0	0
Intercompany Payables, Net	10	3
Other Long-term Liabilities	0	0
Total Liabilities	23	12
Weatherford Shareholders’ Equity	(4,145)	(3,705)
Noncontrolling Interests	0	0
Reportable Legal Entities [Member] | Weatherford Bermuda | Guarantor Subsidiaries [Member]
Current Assets
Cash and Cash Equivalents	244	284	106	195
Other Current Assets	0	0
Total Current Assets	244	284
Equity Investments in Affiliates	7,370	7,531
Intercompany Receivables, Net	204	103
Other Assets	11	15
Total Assets	7,829	7,933
Current Liabilities
Short-term Borrowings and Current Portion of Long-Term Debt	599	373
Accounts Payable and Other Current Liabilities	140	174
Total Current Liabilities	739	547
Long-term Debt	6,634	6,632
Intercompany Payables, Net	0	0
Other Long-term Liabilities	7	7
Total Liabilities	7,380	7,186
Weatherford Shareholders’ Equity	449	747
Noncontrolling Interests	0	0
Reportable Legal Entities [Member] | Weatherford Delaware | Guarantor Subsidiaries [Member]
Current Assets
Cash and Cash Equivalents	0	0	$ 0	$ 0
Other Current Assets	485	654
Total Current Assets	485	654
Equity Investments in Affiliates	6,907	7,203
Intercompany Receivables, Net	0	0
Other Assets	135	4
Total Assets	7,527	7,861
Current Liabilities
Short-term Borrowings and Current Portion of Long-Term Debt	0	0
Accounts Payable and Other Current Liabilities	0	0
Total Current Liabilities	0	0
Long-term Debt	782	775
Intercompany Payables, Net	3,069	3,066
Other Long-term Liabilities	0	0
Total Liabilities	3,851	3,841
Weatherford Shareholders’ Equity	3,676	4,020
Noncontrolling Interests	$ 0	$ 0