Foreign Translation, Currency Devaluation, Percentage

No definition available.

Name:	wft_ForeignTranslationCurrencyDevaluationPercentage
Namespace Prefix:	wft_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

General Devaluation (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
General Devaluation (Details) - USD ($) $ in Millions	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Foreign Exchange Related Charges	$ 0		$ (16)		$ (31)	$ (42)
Angola, Kwanza
Foreign Exchange Related Charges		$ (31)
Foreign Translation, Currency Devaluation, Percentage			11.00%
Venezuelan bolívar fuerte
Foreign Exchange Related Charges				$ (26)