KBR Separation (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
KBR Separation [Abstract]
KBR indemnities and guarantees	$ 210	$ 201

The estimate of the remaining obligation for other indemnities and guarantees provided to our former subsidiary upon separation.

No definition available.

Name:	hal_FormerSubsidiaryIndemnitiesGuaranteesExcludingAmountsRelatedToDepartmentOfJusticeSecuritiesExchangeCommissionSettlements
Namespace Prefix:	hal_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant