Disputes, Litigation and Contingencies (Details) - USD ($) $ in Millions				3 Months Ended		6 Months Ended	9 Months Ended
	May 26, 2016	Nov. 04, 2015	Jun. 30, 2015	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2016
Loss Contingencies [Line Items]
Litigation Settlement, Amount	$ 150				$ (112)	$ (112)
Recorded Unconditional Purchase Obligation							$ 135
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							29
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Recorded Unconditional Purchase Obligation							106
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			140
Fair Value Guarantee [Member] | Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual							$ 28