Condensed Consolidating Financial Statements (Condensed Consolidating Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current Assets
Cash and Cash Equivalents	$ 676	$ 602
Restricted Cash, Current	374	0
Other Current Assets	2,874	2,848
Total Current Assets	3,924	3,450
Equity Investments in Affiliates	0	0
Intercompany Receivables, Net	0	0
Other Assets	2,400	3,151
Total Assets	6,324	6,601
Current Liabilities
Debtor in Possession Financing, Short-term Borrowings and Current Portion of Long-term Debt	1,706	383
Short-term Borrowings and Current Portion of Long-term Debt	320	383
Accounts Payable and Other Current Liabilities	1,674	1,917
Total Current Liabilities	3,380	2,300
Long-term Debt	59	7,605
Intercompany Payables, Net	0	0
Other Long-term Liabilities	475	362
Total Liabilities Not Subject to Compromise	3,914	10,267
Liabilities Subject to Compromise	7,634	0
Weatherford Shareholders’ Equity	(5,262)	(3,705)
Noncontrolling Interests	38	39
Total Liabilities and Shareholders’ Deficiency	6,324	6,601
Other Subsidiaries
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	8,066	9,657
Weatherford Ireland
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	(5,226)	(3,693)
Weatherford Bermuda
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	8,266	7,933
Weatherford Delaware
Current Liabilities
Total Liabilities and Shareholders’ Deficiency	7,550	7,861
Eliminations
Current Assets
Cash and Cash Equivalents	0	0
Restricted Cash, Current	0
Other Current Assets	(517)	(694)
Total Current Assets	(517)	(694)
Equity Investments in Affiliates	(8,913)	(11,394)
Intercompany Receivables, Net	(2,902)	(3,069)
Other Assets	0	0
Total Assets	(12,332)	(15,157)
Current Liabilities
Debtor in Possession Financing, Short-term Borrowings and Current Portion of Long-term Debt	0	0
Accounts Payable and Other Current Liabilities	(517)	(694)
Total Current Liabilities	(517)	(694)
Long-term Debt	0	68
Intercompany Payables, Net	(2,902)	(3,069)
Other Long-term Liabilities	(7)	(7)
Total Liabilities Not Subject to Compromise	(3,426)	(3,702)
Liabilities Subject to Compromise	0
Weatherford Shareholders’ Equity	(8,906)	(11,455)
Noncontrolling Interests	0	0
Total Liabilities and Shareholders’ Deficiency	(12,332)	(15,157)
Reportable Legal Entities [Member] | Other Subsidiaries
Current Assets
Cash and Cash Equivalents	523	318
Restricted Cash, Current	228
Other Current Assets	2,862	2,887
Total Current Assets	3,613	3,205
Equity Investments in Affiliates	374	354
Intercompany Receivables, Net	1,685	2,966
Other Assets	2,394	3,132
Total Assets	8,066	9,657
Current Liabilities
Debtor in Possession Financing, Short-term Borrowings and Current Portion of Long-term Debt	10	10
Accounts Payable and Other Current Liabilities	2,127	2,428
Total Current Liabilities	2,137	2,438
Long-term Debt	59	130
Intercompany Payables, Net	0	0
Other Long-term Liabilities	475	362
Total Liabilities Not Subject to Compromise	2,671	2,930
Liabilities Subject to Compromise	0
Weatherford Shareholders’ Equity	5,357	6,688
Noncontrolling Interests	38	39
Reportable Legal Entities [Member] | Parent Company [Member]
Current Assets
Cash and Cash Equivalents	0	0
Restricted Cash, Current	0
Other Current Assets	9	1
Total Current Assets	9	1
Equity Investments in Affiliates	(5,904)	(3,694)
Intercompany Receivables, Net	669	0
Other Assets	0	0
Total Assets	(5,226)	(3,693)
Current Liabilities
Debtor in Possession Financing, Short-term Borrowings and Current Portion of Long-term Debt	0	0
Accounts Payable and Other Current Liabilities	36	9
Total Current Liabilities	36	9
Long-term Debt	0	0
Intercompany Payables, Net	0	3
Other Long-term Liabilities	0	0
Total Liabilities Not Subject to Compromise	36	12
Liabilities Subject to Compromise	0
Weatherford Shareholders’ Equity	(5,262)	(3,705)
Noncontrolling Interests	0	0
Reportable Legal Entities [Member] | Weatherford Bermuda | Guarantor Subsidiaries [Member]
Current Assets
Cash and Cash Equivalents	121	284
Restricted Cash, Current	146
Other Current Assets	3	0
Total Current Assets	270	284
Equity Investments in Affiliates	7,443	7,531
Intercompany Receivables, Net	548	103
Other Assets	5	15
Total Assets	8,266	7,933
Current Liabilities
Debtor in Possession Financing, Short-term Borrowings and Current Portion of Long-term Debt	1,396	373
Accounts Payable and Other Current Liabilities	26	174
Total Current Liabilities	1,422	547
Long-term Debt	0	6,632
Intercompany Payables, Net	0	0
Other Long-term Liabilities	7	7
Total Liabilities Not Subject to Compromise	1,429	7,186
Liabilities Subject to Compromise	6,756
Weatherford Shareholders’ Equity	81	747
Noncontrolling Interests	0	0
Reportable Legal Entities [Member] | Weatherford Delaware | Guarantor Subsidiaries [Member]
Current Assets
Cash and Cash Equivalents	32	0
Restricted Cash, Current	0
Other Current Assets	517	654
Total Current Assets	549	654
Equity Investments in Affiliates	7,000	7,203
Intercompany Receivables, Net	0	0
Other Assets	1	4
Total Assets	7,550	7,861
Current Liabilities
Debtor in Possession Financing, Short-term Borrowings and Current Portion of Long-term Debt	300
Short-term Borrowings and Current Portion of Long-term Debt		0
Accounts Payable and Other Current Liabilities	2	0
Total Current Liabilities	302	0
Long-term Debt	0	775
Intercompany Payables, Net	2,902	3,066
Other Long-term Liabilities	0	0
Total Liabilities Not Subject to Compromise	3,204	3,841
Liabilities Subject to Compromise	878
Weatherford Shareholders’ Equity	3,468	4,020
Noncontrolling Interests	$ 0	$ 0