Disputes, Litigation and Contingencies (Details) - USD ($) $ in Millions			3 Months Ended	6 Months Ended
	Nov. 04, 2015	Jun. 30, 2015	Mar. 31, 2016	Mar. 31, 2016
Loss Contingencies [Line Items]
Recorded Unconditional Purchase Obligation			$ 156	$ 156
Freedman v. Weatherford International Ltd., et al. [Member] [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Amount		$ 120
Payments for legal settlements	$ 120
Insurance Settlements Receivable			4	19
Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Recorded Unconditional Purchase Obligation			63	63
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Recorded Unconditional Purchase Obligation			93	93
Oil-for-Food Program and Foreign Corrupt Practices Act [Member] | U.S. District Court for the Southern District of Texas v. Weatherford International Ltd. [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			65	65
Fair Value Guarantee [Member] | Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			68	68
Fair Value Guarantee [Member] | Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual			$ 28	$ 28